CN-224232205-U - Spherical brush palm module

CN224232205UCN 224232205 UCN224232205 UCN 224232205UCN-224232205-U

Abstract

A spherical brush palm module is characterized by comprising at least one group of LED light source assemblies, a photoelectric receiver, a spherical mask and an optical structure, wherein each group of LED light source assemblies comprises a plurality of LED light emitting units which are distributed in a ring shape and can emit light in an independent control mode, the LED light source assemblies are used for projecting light rays with different types, different intensities and/or different distribution modes to a space in front of the module, the photoelectric receiver is positioned in the center of an area surrounded by the LED light source assemblies and is used for receiving light ray signals reflected by hands and converting the light ray signals into electric signals, the spherical mask is arranged in front of the LED light source assemblies and the photoelectric receiver, the spherical mask is composed of a transparent matrix and an optical structure attached to the transparent matrix, the optical structure is used for homogenizing light rays emitted by the LED light source assemblies so as to uniformly irradiate the hands, and the center area of the spherical mask is a transparent area so as to ensure that part of light rays can penetrate through and irradiate the photoelectric receiver in an unobstructed manner. The utility model can carry out more uniform irradiation on the palm.

Inventors

ZHANG YONG
LV FANGLU
ZHU LI
WANG BO

Assignees

深圳市光鉴科技有限公司
重庆光鉴傲深科技有限公司

Dates

Publication Date: 20260512
Application Date: 20250401

Claims (10)

1. The utility model provides a sphere brush palm module which characterized in that includes: At least one group of LED light source assemblies, wherein each group of LED light source assemblies comprises a plurality of LED light emitting units which are distributed in a ring shape and can independently control light emission, and the LED light source assemblies are used for projecting light rays with different types, different intensities and/or different distribution modes to the space in front of the module; The photoelectric receiver is positioned at the center of the area surrounded by the LED light source assembly, and is used for receiving the light ray signals reflected by the palm and converting the light ray signals into electric signals; The spherical mask is arranged in front of the LED light source assembly and the photoelectric receiver; The spherical cover consists of a transparent matrix and an optical structure attached to the transparent matrix, and the optical structure is used for homogenizing light rays emitted by the LED light source assembly so as to uniformly irradiate the palm; The central region of the spherical mask is a transparent region to ensure that a portion of the light can pass through and impinge on the photo-receiver unimpeded.
2. The spherical brush head module according to claim 1, wherein the number of the LED light emitting units in each group of the LED light source assemblies is not less than 3, and the LED light emitting units are uniformly distributed at equal intervals around the photoelectric receiver.
3. The spherical palm brushing module according to claim 2, wherein the number of the groups of the LED light source assemblies is 2, the two groups of the LED light source assemblies are distributed up and down on a plane perpendicular to the central axis of the photoelectric receiver, and the emitting angles or positions of the LED light emitting units in each group are different from the emitting angles or positions of the light emitting units in the other group corresponding to the positions.
4. The spherical brush head module according to claim 1, wherein the LED light emitting unit is capable of emitting at least two different types of light of infrared light, visible light and ultraviolet light.
5. The spherical brush head module according to claim 4, wherein the LED light emitting unit emits light in different modes of pulse, continuous or alternate according to a preset program or an external control command.
6. The spherical brush head module according to claim 4, wherein the optical structure on the spherical cover comprises at least two different types of fluorescent powder areas, and the different types of fluorescent powder emit fluorescent light with specific colors and/or intensities under the excitation of different types of light rays respectively.
7. The spherical brush head module according to claim 6, wherein the different types of fluorescent powder areas form regular or irregular patterns on the spherical cover, and the patterns correspond to the placement positions of the palm or specific identification areas.
8. The spherical brush head module according to claim 1, further comprising a signal processing circuit electrically connected to the photoelectric receiver for amplifying, filtering, digitizing and extracting the electrical signal output from the photoelectric receiver.
9. The spherical brush head module according to claim 1, wherein the transparent substrate is made of polymethyl methacrylate material, and the optical structure is formed on the surface of the transparent substrate by micro-nano processing technology.
10. The spherical brush head module according to claim 1, wherein the LED light source assembly and the photoelectric receiver are mounted on a printed circuit board, and the printed circuit board is of a multi-layer structure.

Description

Spherical brush palm module Technical Field The utility model relates to the technical field of palm brushing modules, in particular to a spherical palm brushing module. Background Palm recognition is used as an emerging biological recognition technology, and is gradually applied to the fields of access control systems, payment terminals, attendance management and the like due to the advantages of non-contact, convenience, sanitation and the like. The traditional brush palm recognition module generally adopts a planar structure and consists of a common LED light source, a common receiver and a common plane mask. Such planar structures have certain limitations in practical applications. The LED light sources of the traditional palm brushing module are simpler in distribution mode, are generally fixedly arranged and are difficult to independently control the luminous state of each light source. This results in poor uniformity of the light projection, and may result in inconsistent illumination intensity at different parts of the palm. For example, the palm edge portion may be under-illuminated and the center portion is under-illuminated, thereby affecting the quality of the reflected light signal and reducing the accuracy and stability of the identification. Most conventional modules emit only a single type of light, such as visible or infrared light. The palm characteristic information which can be obtained by the single type of light is limited, and for special situations, such as stains, grease or palms with different complexion on the surface of the palms, the palms can not be accurately identified, so that the identification rate is reduced. The conventional plane cover has weak homogenizing ability for light, and cannot uniformly irradiate light on the palm effectively. Uneven light irradiation can cause deviation of light signals reflected by the palm, increase difficulty of subsequent signal processing and easily cause erroneous judgment. Due to the design limitations of the conventional module, it is more sensitive to interference of ambient light. Under different illumination conditions, such as strong light direct irradiation or weak light environment, the performance of the module can be greatly influenced, and the stable and reliable recognition effect can not be ensured. The foregoing background is only for the purpose of providing an understanding of the inventive concepts and technical aspects of the present utility model and is not necessarily prior art to the present application and is not intended to be used as an aid in the evaluation of the novelty and creativity of the present utility model in the event that no clear evidence indicates that such is already disclosed at the date of filing of the present application. Disclosure of utility model Therefore, the utility model adopts at least one group of LED light source components to emit light, the spherical cover processes the light path, so that the light path is more matched with palm surface characteristics, the palm can be irradiated more uniformly, meanwhile, the center of the spherical cover is transparent, the environment interference can be reduced, and the anti-interference capability is obviously enhanced by matching with the palm. The utility model provides a spherical brush palm module, which is characterized by comprising the following components: At least one group of LED light source assemblies, wherein each group of LED light source assemblies comprises a plurality of LED light emitting units which are distributed in a ring shape and can independently control light emission, and the LED light source assemblies are used for projecting light rays with different types, different intensities and/or different distribution modes to the space in front of the module; The photoelectric receiver is positioned at the center of the area surrounded by the LED light source assembly, and is used for receiving the light ray signals reflected by the palm and converting the light ray signals into electric signals; The spherical mask is arranged in front of the LED light source assembly and the photoelectric receiver; The spherical cover consists of a transparent matrix and an optical structure attached to the transparent matrix, and the optical structure is used for homogenizing light rays emitted by the LED light source assembly so as to uniformly irradiate the palm; The central region of the spherical mask is a transparent region to ensure that a portion of the light can pass through and impinge on the photo-receiver unimpeded. Optionally, the spherical palm brushing module is characterized in that the number of the LED light emitting units in each group of the LED light source assemblies is not less than 3, and the LED light emitting units are uniformly distributed around the photoelectric receiver at equal intervals. Optionally, the number of the groups of the LED light source assemblies is 2, the two groups of the LED light source assem