A brush palm module with light supplement

Abstract

A brush palm module with light supplementing, characterized by comprising: a shell; an array light source located inside the shell and facing the outside of the shell for emitting light to irradiate the palm; a light homogenizing plate located above the array light source to make the light emitted by the array light source uniformly exit; a sensor having the same orientation as the array light source for receiving the reflection signal of the palm. The utility model adopts the array light source to supplement light, and adopts the light homogenizing plate to make the light of the array light source more uniform, and has higher light efficiency and energy utilization.

Description

Technical Field

[0001] This utility model relates to the field of palm recognition technology, specifically to a palm-scanning module with supplementary lighting. Background Technology

[0002] The supplementary lighting design of the palm-scanning module is a crucial aspect of palm-scanning devices, as it directly affects the quality of palm image acquisition and recognition accuracy during palm scanning.

[0003] The supplementary lighting for the palm-scanning module is mainly achieved through a supplementary light. The supplementary light and the camera are usually facing the same side to ensure that the light can be evenly distributed on the palm. The light emitted by the supplementary light is reflected by the palm and captured by the camera, thus forming a clear image of the palm.

[0004] There are generally two types of supplementary lighting: static supplementary lighting and dynamic supplementary lighting.

[0005] Static supplementary lighting: The supplementary light illuminates the palm at a fixed brightness and angle, suitable for palm recognition in most normal environments.

[0006] Dynamic lighting: With technological advancements, some advanced palm-swiping devices have adopted dynamic lighting technology. This technology uses a controller to monitor the distance between the palm and the device in real time, and adjusts the brightness and angle of the lighting accordingly to achieve a more precise lighting effect.

[0007] Static supplemental lighting provides weak information under certain conditions, resulting in poor recognition performance. Dynamic supplemental lighting, on the other hand, requires real-time adjustment of the brightness and angle of the supplemental lights, which is more costly.

[0008] The above background information is provided only to aid in understanding the inventive concept and technical solution of this utility model. It does not necessarily belong to the prior art of this patent application. In the absence of clear evidence that the above information was disclosed on the filing date of this patent application, the above background information should not be used to evaluate the novelty and inventiveness of this application. Utility Model Content

[0009] Therefore, this invention uses an array of light sources for supplementary lighting and employs a light-diffusing plate to make the light from the array of light sources more uniform, resulting in higher light efficiency and energy utilization.

[0010] This utility model provides a palm brush module with supplementary lighting, characterized in that it includes:

[0011] case;

[0012] An array of light sources, located inside the housing and facing outwards, is used to emit light to illuminate the palm;

[0013] A light-diffusing plate is located above the array light source to ensure that the light emitted by the array light source is emitted uniformly.

[0014] A sensor, having the same orientation as the array light source, is used to receive reflected signals from the palm.

[0015] Optionally, the aforementioned palm brush module with supplementary lighting is characterized in that the array light source comprises multiple sub-light sources;

[0016] The sub-light sources are centrally symmetrically distributed.

[0017] Optionally, the brush module with supplementary lighting is characterized in that the range of adjacent sub-light sources illuminating the light-diffusing plate overlaps.

[0018] Optionally, the brush module with supplementary lighting is characterized in that the sub-light source is fixed on a substrate, and the surface of the substrate is a high-reflectivity surface to reflect light.

[0019] Optionally, the brush module with supplemental lighting is characterized in that the edge of the upper surface of the light-diffusing plate is higher than the center position, so that the light converges towards the center of the light-diffusing plate.

[0020] Optionally, the aforementioned palm brush module with supplementary lighting is characterized in that the array light source includes at least a first light source, a second light source, and a third light source; the first light source, the second light source, and the third light source are each controlled by different independent switches.

[0021] Optionally, the palm brush module with supplemental lighting is characterized in that the brightness of the first light source, the second light source, and the third light source are different.

[0022] Optionally, the aforementioned palm brush module with supplemental lighting is characterized in that the first light source is near the center, the third light source is near the edge, and the second light source is located between the first light source and the third light source; the light-diffusing plate above the first light source is a first light-diffusing plate, the light-diffusing plate above the second light source is a second light-diffusing plate, and the light-diffusing plate above the third light source is a third light-diffusing plate; the upper surface of the third light-diffusing plate is higher than the upper surface of the second light-diffusing plate; and the upper surface of the second light-diffusing plate is higher than the upper surface of the first light-diffusing plate.

[0023] Optionally, the aforementioned brush palm module with supplemental lighting is characterized in that it further includes a transparent cover plate located above the light-diffusing plate for protection.

[0024] Optionally, the brush module with supplemental lighting is characterized in that the shell includes a first step and a second step; the first step is fixedly connected to the transparent cover plate, and the second step is fixedly connected to the light-diffusing plate; the first step is higher than the second step, and the first step is farther from the center of the light-diffusing plate than the second step.

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

[0026] The array light source of this invention shines directly onto the light-diffusing plate. After being modulated by the light-diffusing plate, the light path is more uniform and the light is softer, which is conducive to obtaining better quality palm images. At the same time, using an array light source for supplementary lighting allows for more diverse layout of the supplementary light source intensity, making the light source more concentrated in the core area for palm-swiping applications. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort. Other features, objects, and advantages of this utility model will become more apparent by reading the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0028] Figure 1 This is a schematic diagram of the structure of a palm brush module with supplementary lighting in an embodiment of this utility model;

[0029] Figure 2 This is a schematic diagram of an optical path in an embodiment of the present invention;

[0030] Figure 3 This is a schematic diagram of the sub-light source arrangement in an embodiment of the present invention;

[0031] Figure 4 This is a schematic diagram of the structure of a transparent cover plate in an embodiment of this utility model.

[0032] 1-Shell;

[0033] 2-Sensors;

[0034] 3-Array light source;

[0035] 4-Light homogenizer;

[0036] 5-sub-light source;

[0037] 6-Substrate;

[0038] 7-High reflectivity surfaces;

[0039] 8-First light source;

[0040] 9-Second light source;

[0041] 10-Third light source;

[0042] 11-Transparent cover;

[0043] 12 - First step;

[0044] 13 - Second Step; Detailed Implementation

[0045] The present invention will now be described in detail with reference to specific embodiments. These embodiments will help those skilled in the art to further understand the present invention, but do not limit the present invention in any way. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention. These all fall within the protection scope of the present invention.

[0046] The terms "first," "second," "third," "fourth," etc. (if present) in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that embodiments of the utility model described herein can be implemented, for example, in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0047] This utility model provides a palm brush module with supplementary lighting, which aims to solve the problems existing in the prior art.

[0048] The technical solutions of this utility model and this application solve the above-mentioned technical problems in detail below with specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments. The embodiments of this utility model will now be described with reference to the accompanying drawings.

[0049] This invention uses an array of light sources for supplementary lighting and employs a light-diffusing plate to make the light from the array of light sources more uniform, resulting in higher light efficiency and energy utilization.

[0050] Figure 1This is a schematic diagram of the structure of a brush palm module with supplementary lighting according to an embodiment of this utility model. Figure 1 As shown, an embodiment of this utility model includes a palm brush module with supplementary lighting, comprising:

[0051] Shell 1.

[0052] Specifically, housing 1 is used to house and protect internal components such as transmitters, sensors, and array light sources. The housing can be of various shapes, such as cuboids or cylinders. One surface of the housing has an opening for light to pass through and capture palm images. The housing is generally made of robust and durable materials, such as metal or high-strength plastics, to resist external impacts and prevent damage to internal components. The housing design should take into account heat dissipation requirements to ensure the stability of the module during long-term operation.

[0053] Emitter 2 is used to emit active light to illuminate the palm.

[0054] Specifically, transmitter 2 can be an infrared emitter, a visible light source, or another type of light source to provide sufficient light for sensor 2 to capture an image of the palm. The transmitter typically includes components such as a light source and a lens, capable of generating pre-designed light. The transmitter can be an infrared emitter or a visible light emitter. The active light source can be floodlight or structured light, etc. The specific light type can be set according to implementation requirements. The number of transmitters can be one, two, three, or more. When there are two or more transmitters, the types of transmitters can be different; for example, one can be an infrared emitter and another a visible light emitter.

[0055] Sensor 2 is used to receive the reflected signal from the palm to generate a palm image.

[0056] Specifically, the sensor can be an infrared sensor or other types of optical sensor used to capture reflected light from the palm and convert it into a digital image. This is one of the core components of palm recognition technology. The sensor typically employs a high-sensitivity image sensor, such as CMOS or CCD. When sensor 2 is a visible light sensor, it can acquire the texture features of the palm surface; when sensor 2 is an infrared sensor, it can acquire the vascular features of the palm epidermis. Both the texture and vascular features of the palm can be used for liveness detection and authentication. The type and number of sensors need to match the transmitter. When transmitter 2 is a visible light transmitter, sensor 2 is a visible light sensor. When transmitter 2 is an infrared transmitter, sensor 2 is an infrared sensor. When there are two or more transmitters of different types, there are two or more sensors of different types. It should be noted that the number of transmitters 2 and the number of sensors 2 are not always the same.

[0057] In some embodiments, the number of sensors 2 is greater than the number of transmitters 2. For example, if there is one transmitter 2 and two sensors 2, the two sensors can obtain images from different angles, forming a binocular system for obtaining depth data.

[0058] An array of light sources 3 is distributed around the emitter to illuminate the palm.

[0059] Specifically, the array light source consists of multiple LEDs or other light sources arranged in a specific pattern around the emitter. These light sources can be controlled independently to achieve different lighting effects. The array light source 3 helps improve recognition accuracy in low-light environments by providing supplemental lighting.

[0060] A light-diffusing plate 4 is located above the array light source to ensure that the light emitted by the array light source is emitted uniformly.

[0061] Specifically, a light-diffusing plate is used to diffuse and homogenize the light emitted from an array of light sources, helping to eliminate shadows and reflections caused by uneven lighting and improving image quality. Light-diffusing plates are generally made of special optical materials with good light transmittance and uniformity. They diffuse and homogenize the light emitted from the array of light sources, resulting in more even and softer lighting on the palm surface. For example... Figure 2 As shown, the light emitted by the array light source becomes more uniform and softer after passing through the light homogenizing plate 4.

[0062] In some embodiments, the array light source 3 includes multiple sub-light sources 5. The multiple sub-light sources 5 are centrally symmetrically distributed. For example... Figure 1 As shown, multiple sub-light sources are distributed in a matrix array. These sub-light sources can also be centrally symmetrically distributed around the center of the light-diffusing plate, ensuring uniform light distribution in all directions. This centrally symmetrical layout also optimizes light utilization efficiency and the module's space utilization. By precisely controlling the illumination angle and intensity of each sub-light source, the brightness and contrast of the palm image can be further adjusted to adapt to different environmental conditions and usage requirements. This design enables the palm-brush module with supplementary lighting to exhibit good performance and reliability in various application scenarios.

[0063] In some embodiments, the areas illuminated by adjacent sub-light sources overlap on the light-diffusing plate. By designing the illumination ranges of adjacent sub-light sources to partially overlap, a more uniform illumination distribution can be achieved. This is because the edges of each sub-light source tend to be less bright than the center, and the overlapping area can compensate for this brightness difference, thereby ensuring that the entire illumination area receives sufficient light. This is particularly important for palm recognition technology, as uneven illumination can cause some areas of the palm image to be too bright or too dark, affecting recognition accuracy. The effective field of view (FOV) of a sub-light source is typically between 30 and 50 degrees. For example, when the effective FOV of a sub-light source is 40 degrees, the light intensity outside 40 degrees is significantly reduced. In this case, overlapping the areas outside 40 degrees of different sub-light sources can make the light intensity on the light-diffusing plate more uniform and improve energy utilization efficiency.

[0064] In some embodiments, the sub-light source 5 is fixed to a substrate 6, the surface of which is a high-reflectivity surface 7 to reflect light. The use of a high-reflectivity substrate surface ensures that the emitted light is utilized to the maximum extent possible, rather than being absorbed or lost. When light emitted from the sub-light source strikes the surface of the substrate, it is effectively reflected due to the substrate's high reflectivity, thereby further evenly distributing the light to the area requiring illumination in conjunction with a light diffuser. The high-reflectivity surface can be made of any of the following materials: tin, silver plating, gold plating, copper plating, or other unlisted materials that meet the requirements. This design not only optimizes the lighting effect but also improves energy efficiency, as the light is fully utilized, reducing energy waste.

[0065] In some embodiments, the edge of the upper surface of the light-diffusing plate is positioned higher than the center, causing the light rays to converge towards the center of the plate. Because the upper surface of the light-diffusing plate is concave, when light passes through it, it is deflected towards the center due to the concave shape. This deflection enhances the illumination intensity in the central area, helping to more clearly capture the texture and features of the palm's center. Simultaneously, light from the edges is also guided towards the center, reducing shadows caused by insufficient light at the edges. This is significant for improving the overall clarity and recognition rate of the palm image. While the light converges towards the center, the design of the concave light-diffusing plate also considers light diffusion and uniform distribution. By adjusting the curvature of the concave surface and the material of the light-diffusing plate, it can be ensured that the light maintains a certain degree of diffusion while converging, allowing all areas of the palm surface to receive relatively uniform illumination.

[0066] In some embodiments, the array light source includes at least a first light source 8, a second light source 9, and a third light source 10; the first light source, the second light source, and the third light source are each controlled by different independent switches. Figure 3As shown, the first, second, and third light sources are distributed sequentially. The brightness of the first, second, and third light sources differs. Independent control of the different light sources allows the lighting module to better adapt to different application scenarios. For example, in situations requiring high brightness, all light sources can be turned on simultaneously; while in situations where low brightness is sufficient, only some light sources can be turned on. This adaptability allows the device to perform optimally in various environments. The first, second, and third light sources can have different brightness levels to achieve more brightness adjustment methods and meet the supplementary lighting needs of more usage scenarios.

[0067] In some embodiments, the first light source is located near the center, the third light source is located near the edge, and the second light source is located between the first and third light sources. The light-diffusing plate above the first light source is a first light-diffusing plate, the light-diffusing plate above the second light source is a second light-diffusing plate, and the light-diffusing plate above the third light source is a third light-diffusing plate. The upper surface of the third light-diffusing plate is higher than the upper surface of the second light-diffusing plate; the upper surface of the second light-diffusing plate is higher than the upper surface of the first light-diffusing plate. The first light source, located near the center, typically serves as the main light source, providing strong illumination to the central area of ​​the palm. Since the center of the palm often contains many recognizable features (such as palm prints and palm veins), the brightness and stability of the first light source are crucial for recognition accuracy. The third light source, located near the edge, supplements the illumination of the edge areas, reducing shadows caused by the palm edges or gaps between fingers. The arrangement of the third light source helps ensure the overall clarity and integrity of the palm image. The second light source, located between the first and third light sources, acts as a transition and coordinator. It can adjust its brightness and angle as needed to balance the illumination intensity between the central and edge areas, improving illumination uniformity. The upper surface of the third light-diffusing plate is higher than that of the second light-diffusing plate, which in turn is higher than that of the first light-diffusing plate. This design utilizes the principles of light refraction and reflection, causing light to be deflected and diffused to varying degrees as it passes through light-diffusing plates at different heights. Specifically, the third light-diffusing plate at the edge, being higher, allows light to converge more easily towards the center; while the first light-diffusing plate in the center is responsible for evenly diffusing the light outwards. By adjusting the height differences of the light-diffusing plates, precise control of the light path can be achieved, thereby optimizing the illumination effect on the palm surface. Light in the edge area is guided towards the center, reducing shadows and reflections; while light in the center area is evenly diffused, ensuring clear capture of the palm's central features. The optimized illumination effect helps to more clearly capture the texture and feature information of the palm surface, thereby improving the accuracy and precision of palm recognition. This embodiment allows the palm recognition module to adapt to palms of different sizes, shapes, and placement methods, improving the system's adaptability and flexibility. By finely controlling the light source and light-diffusing plates, energy consumption can be reduced while meeting illumination requirements, improving energy efficiency.

[0068] In some embodiments, the first, second, and third light sources illuminate the same area on the homogenizing plate. These light sources are designed to have similar spot sizes or beam divergence angles to ensure that their respective illuminated areas occupy similar spatial extents on the homogenizing plate. When all light sources illuminate the same area on the homogenizing plate, the plate can receive and disperse light more evenly. This helps reduce illumination differences caused by uneven light source distribution, thereby improving the uniformity of illumination on the palm surface. Although the illumination area is the same, the power and brightness of different light sources may vary. By adjusting the power of the light sources or selecting appropriate light-emitting elements (such as LEDs, lasers, etc.), the light intensity and spectral distribution can be adjusted as needed while maintaining a consistent illumination area.

[0069] In some embodiments, a transparent cover plate 11 is also included, positioned above the light-diffusing plate, to provide protection. The transparent cover plate prevents physical damage and scratches. It needs to have good light transmittance to ensure light can pass smoothly through and illuminate the palm surface. High-quality transparent materials minimize light attenuation and scattering, maintaining the intensity and uniformity of illumination. To avoid reflection interference from the transparent cover plate itself, its surface is typically treated with special methods (such as an anti-reflective coating) to reduce reflectivity. This helps reduce glare in the palm image and improves image quality.

[0070] In some embodiments, the housing includes a first step 12 and a second step 13; the first step is fixedly connected to the transparent cover plate, and the second step is fixedly connected to the light-diffusing plate; the first step is higher than the second step, and the first step is farther from the center of the light-diffusing plate than the second step. Figure 4 As shown, the first step is located at the top of the housing and is fixedly connected to the transparent cover. Since the first step is higher than the second step and farther from the center of the light-diffusing plate, it primarily provides a stable support platform for the transparent cover. This design helps ensure a certain distance between the transparent cover and the light-diffusing plate, preventing wear or pressure that might occur from direct contact from being transmitted to the light-diffusing plate. The second step is located below the first step and is fixedly connected to the light-diffusing plate. The second step directly supports the light-diffusing plate, ensuring its stability and positional accuracy. Because the second step is closer to the center of the light-diffusing plate than the first step, it can more effectively transmit light from the array light source, reducing light loss and scattering during transmission. The first step's greater distance from the center of the light-diffusing plate compared to the second step helps to better control light propagation. For example, in applications where it is necessary to avoid direct central light shining onto the transparent cover causing reflections or glare, this design can effectively guide light to scatter in all directions, thereby reducing unwanted light effects.

[0071] The various embodiments described in this specification are presented in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. The above description of the disclosed embodiments enables those skilled in the art to implement or use this invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this invention. Therefore, this invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0072] The specific embodiments of this utility model have been described above. It should be understood that this utility model is not limited to the specific embodiments described above, and those skilled in the art can make various modifications or variations within the scope of the claims, which do not affect the substantive content of this utility model.

Claims

1. A palm brush module with supplemental lighting, characterized in that, include: case; An array of light sources, located inside the housing and facing outwards, is used to emit light to illuminate the palm; A light-diffusing plate is located above the array light source to ensure that the light emitted by the array light source is emitted uniformly. A sensor, having the same orientation as the array light source, is used to receive reflected signals from the palm.

2. The palm brush module with supplementary lighting according to claim 1, characterized in that, The array light source comprises multiple sub-light sources; The sub-light sources are centrally symmetrically distributed.

3. A palm brush module with supplementary lighting according to claim 2, characterized in that, The areas illuminated by adjacent sub-light sources on the homogenizing plate overlap.

4. A palm brush module with supplementary lighting according to claim 2, characterized in that, The sub-light source is fixed on a substrate, the surface of which is a highly reflective surface to reflect light.

5. A palm brush module with supplementary lighting according to claim 1, characterized in that, The edge of the upper surface of the light-diffusing plate is positioned higher than the center, so that the light rays converge toward the center of the light-diffusing plate.

6. A palm brush module with supplementary lighting according to claim 1, characterized in that, The array light source includes at least a first light source, a second light source, and a third light source; the first light source, the second light source, and the third light source are each controlled by different independent switches.

7. A palm brush module with supplementary lighting according to claim 6, characterized in that, The brightness of the first light source, the second light source, and the third light source are different.

8. A palm brush module with supplementary lighting according to claim 6, characterized in that, The first light source is near the center, the third light source is near the edge, and the second light source is located between the first light source and the third light source; the light-diffusing plate above the first light source is the first light-diffusing plate, the light-diffusing plate above the second light source is the second light-diffusing plate, and the light-diffusing plate above the third light source is the third light-diffusing plate; the upper surface of the third light-diffusing plate is higher than the upper surface of the second light-diffusing plate; the upper surface of the second light-diffusing plate is higher than the upper surface of the first light-diffusing plate.

9. A palm brush module with supplementary lighting according to claim 1, characterized in that, It also includes a transparent cover plate located above the light-diffusing plate to provide protection.

10. A palm brush module with supplementary lighting according to claim 9, characterized in that, The housing includes a first step and a second step; the first step is fixedly connected to the transparent cover plate, and the second step is fixedly connected to the light-diffusing plate; the first step is higher than the second step, and the first step is farther from the center of the light-diffusing plate than the second step.

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