Feature recognition assembly and device

Abstract

The invention provides a feature recognition assembly and device, and the feature recognition assembly specifically comprises an assembly main body which is provided with a working surface and a bottom surface opposite to the working surface, and the working surface is provided with a cambered surface region which is bent inwards in a first direction; the flexible sensor is arranged in the cambered surface area; and the at least one group of first light sources are arranged on the working surface, are positioned at two ends of the cambered surface area along the first direction, and are configured to emit light to one side, far away from the bottom surface, of the working surface so as to provide a light source for the flexible sensor.

Description

Technical Field

[0001] The present application relates to the field of image recognition technology, and in particular to a feature recognition component and device. Background Art

[0002] Finger vein recognition technology is a biometric recognition technology that is currently widely used in the field of identity authentication. In related technologies, finger vein recognition devices usually adopt a top light source transmission solution, that is, an infrared light source is placed above the finger, and an optical lens and CMOS / CCD and other imaging modules are placed under the finger to receive the near-infrared light that passes through the finger. This solution makes it difficult to reduce the thickness of the module, affecting the practicality and aesthetics of the device, and it has become increasingly difficult to meet the corresponding needs in specific fields.

[0003] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present disclosure, and therefore may include information that does not constitute the prior art known to those skilled in the art. Summary of the invention

[0004] In view of this, the present application proposes a feature recognition component and device to solve or partially solve the above problems.

[0005] Based on the above objectives, in a first aspect, the present application provides a feature recognition component, including:

[0006] The component body is provided with a working surface and a bottom surface opposite to the working surface, and the working surface is provided with a curved surface area that bends inward in a first direction;

[0007] A flexible sensor is arranged on the arc surface area;

[0008] At least one group of first light sources is arranged on the working surface, located at two ends of the arc surface area along the first direction, and is configured to emit light to a side of the working surface away from the bottom surface to provide light source for the flexible sensor.

[0009] In some exemplary embodiments, the arc angle of the arc surface area is 50° to 70°, and the arc length is 30 mm to 50 mm.

[0010] In some exemplary embodiments, the arc angle of the arc surface area is 60° and the arc length is 43.2 mm.

[0011] In some exemplary embodiments, the angle between the at least one group of first light sources and the working surface is 20° to 90°, and the vertical distance between the at least one group of first light sources and the middle of the curved surface of the curved surface area is 20 mm to 30 mm.

[0012] In some exemplary embodiments, the angle between the at least one group of first light sources and the working surface is 60°, and the vertical distance between the at least one group of first light sources and the middle of the curved surface of the curved surface area is 25.7 mm.

[0013] In some exemplary embodiments, the feature recognition component further includes:

[0014] At least one second light source is disposed at two ends of the arc surface area along a second direction; wherein the second direction and the first direction are perpendicular to each other on the plane where the working surface is located;

[0015] at least one light detector disposed adjacent to the at least one second light source;

[0016] The at least one second light source and the at least one light detector are configured to receive light from the at least one second light source through the at least one light detector to determine whether the at least one group of first light sources starts to emit light.

[0017] In some exemplary embodiments, the at least one group of first light sources is connected in series with the at least one second light source.

[0018] In some exemplary embodiments, the at least one light detector is further configured to control the light intensity of the at least one group of first light sources according to the received light intensity of the at least one second light source.

[0019] In some exemplary embodiments, the at least one group of first light sources is symmetrically arranged at two ends of the arc surface area along the first direction.

[0020] Based on the same concept, in a second aspect, the present application also provides a feature recognition device, comprising the feature recognition component as described in the first aspect above.

[0021] As can be seen from the above, the present application provides a feature recognition component and device, the feature recognition component specifically includes: a component body, provided with a working surface and a bottom surface opposite to the working surface, the working surface is provided with a curved surface area that bends inward in a first direction; a flexible sensor, arranged in the curved surface area; at least one group of first light sources, arranged on the working surface, located at both ends of the curved surface area along the first direction, configured to emit light to the side of the working surface away from the bottom surface, and provide light source for the flexible sensor. The present application designs the curved surface area so that when the detected object such as the user's finger or other finger-like structure is placed in the area, it can better fit with the flexible sensor arranged on the curved surface area, thereby improving the detection accuracy; then, at least one group of first light sources are arranged at both ends of the curved surface area along the bending direction to provide detection light, when the detected object is placed in the area, the light source is provided by at least one group of first light sources, and the light is reflected after passing through the detected object, and then detected by the flexible sensor, thereby completing the detection of the detected object. From this, it can be seen that the present application first increases the contact area between the sensor and the object to be detected by using the curved surface area of ​​the curved surface design, and then uses the light source on the same side to provide detection light, so that the detection instrument emits light from the opposite side to penetrate and illuminate the object to be detected, and adjusts it to emit light from the same side to detect the object to be detected using the reflection principle. This greatly reduces the thickness of the feature recognition component, making the feature recognition component more streamlined and miniaturized, providing a larger design space for the corresponding equipment, and improving the practicability and aesthetics of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the related technologies, the drawings required for use in the embodiments or the related technical descriptions are briefly introduced below. Obviously, the drawings described below are only embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 A schematic diagram of the cross-sectional structure of an exemplary feature recognition component provided in an embodiment of the present application.

[0024] Figure 2 A schematic diagram of the top view of the exemplary feature recognition component provided in an embodiment of the present application.

[0025] Figure 3 A schematic diagram of a configuration method of the curved surface area provided in an embodiment of the present application.

[0026] Figure 4 A schematic diagram of a configuration method of the first light source provided in an embodiment of the present application.

[0027] Figure 5A schematic diagram of the effect of ray tracing of the first light source provided in an embodiment of the present application.

[0028] Figure 6 A schematic diagram of the effect of radiation illumination detection obtained by a finger provided in an embodiment of the present application.

[0029] Figure 7 A schematic diagram of the effect of illumination uniformity obtained on a finger provided in an embodiment of the present application.

[0030] Figure 8 A schematic diagram of a circuit in which a first light source and a second light source are connected in series according to an embodiment of the present application. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solutions and advantages of this specification more clear, this specification is further described in detail below in combination with specific embodiments and with reference to the accompanying drawings.

[0032] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present application should be understood by people with ordinary skills in the field to which the present application belongs. The "first", "second" and similar words used in the embodiments of the present application do not represent any order, quantity or importance, but are only used to distinguish different components. "Including" or "comprising" and similar words mean that the elements, objects or method steps appearing before the word cover the elements, objects or method steps listed after the word and their equivalents, without excluding other elements, objects or method steps. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0033] As described in the background technology section, in some specific application scenarios, finger vein recognition technology is a biometric recognition technology that is widely used in the field of identity authentication. Its technical principle is to use the fact that hemoglobin in blood vessels has a certain absorption effect on near-infrared light with a wavelength between 700 and 1000nm. Therefore, a near-infrared light source is used to illuminate the finger, and an image sensor is used to collect the near-infrared light from the finger. Since there is less near-infrared light from the vein area, a clear image of the vein pattern is formed on the image sensor.

[0034] In the related art, current finger or other finger-like structure detection instruments or feature recognition instruments generally use a light source set on the top of the detection instrument to transmit light to the object to be detected placed in the detection instrument, and then use a sensor located on the bottom of the object to be detected to sense it, so as to detect the object to be detected, such as forming a vein pattern image through an image sensor. This top transmission detection solution is bound to surround the object to be detected, and its thickness is difficult to reduce. With the development of technology, it has already had an impact on some fields, making it difficult to meet the corresponding needs, and has limited the practicality and aesthetics of the equipment.

[0035] Combined with the above actual situation, the embodiment of the present application provides a feature recognition component. The present application designs a curved surface area so that when the detected object such as the user's finger or other finger-like structures is placed in the area, it can better fit with the flexible sensor set on the curved surface area, thereby improving the detection accuracy; then, at least one group of first light sources are set at both ends of the curved surface area along the bending direction to provide detection light. When the detected object is placed in the area, at least one group of first light sources is used to provide light. After passing through the detected object, the light is reflected and then detected by the flexible sensor, thereby completing the detection of the detected object. It can be seen from this that the present application first increases the contact area between the sensor and the detected object through the curved surface area designed by the curved surface, and then uses the light source on the same side to provide detection light, so that the detection instrument emits light from the opposite side to penetrate and irradiate the detected object, and adjusts it to emit light from the same side to detect the detected object using the reflection principle, thereby greatly reducing the thickness of the feature recognition component, making the feature recognition component more streamlined and miniaturized, providing a larger design space for the corresponding equipment, and improving the practicality and aesthetics of the equipment.

[0036] Figure 1 A schematic cross-sectional structure diagram of an exemplary feature recognition component provided in an embodiment of the present application is shown; Figure 2 A schematic diagram of the top view of an exemplary feature recognition component provided in an embodiment of the present application is shown.

[0037] Combination Figure 1 and Figure 2 As shown, a feature recognition component 100 of an embodiment of the present application may specifically include: a component body 110, provided with a working surface 111 and a bottom surface 112 opposite to the working surface 111, the working surface 111 is provided with an arc surface area 113 bent inwardly in a first direction X; a flexible sensor 120, arranged in the arc surface area 113; at least one group of first light sources 130, arranged on the working surface 111, located at both ends of the arc surface area 113 along the first direction X, and configured to emit light to a side of the working surface 111 away from the bottom surface 112, so as to provide a light source for the flexible sensor 120.

[0038] In this embodiment, the component body 110 can be used to carry other structures in the feature recognition component 100. The component body 110 may include a working surface 111. The feature recognition component 100 mainly uses the working surface 111 to perform feature recognition work on the object placed on the feature recognition component 100. The side opposite to the working surface 111 is generally the bottom surface 112 of the feature recognition component 100. A curved surface area 113 that is curved inward in the first direction X is provided on the working surface 111. Figure 1 And attached Figure 2 It can be seen that the arc surface area 113 is bent in one direction, that is, in the first direction X, but is not further bent in the second direction Y perpendicular to the first direction X. The whole is similar to a section of the cylindrical side. For the arc surface area 113, in a specific application scenario, adaptive adjustment can be made according to the specific structure to be detected, for example, the curvature, arc length and other properties of the arc surface area 113 can be adjusted according to the structural characteristics of the finger.

[0039] In some embodiments, the feature recognition component 100 can be used to detect and identify features of structures such as fingers. Of course, in some specific scenarios, it can also detect finger-like structures, such as human toes, hooves, claws, fingers and other structures of some animals. There is no specific limitation on this. In this embodiment and subsequent embodiments, finger detection is used as an example for illustrative explanation.

[0040] In this embodiment, the flexible sensor 120 is mainly used for signal reception, and in this embodiment, it is mainly used for receiving optical signals. It can be applied on the curved surface area 113 to partially cover or fully cover the entire curved surface area 113.

[0041] In this embodiment, at least one group of first light sources 130 is further arranged on the working surface 111, and is located at both ends of the arc surface area 113 along the first direction X. The first light source 130 here can be a strip light strip or a Figure 2Point-shaped light sources are shown. Afterwards, a group of first light sources 130 may include only one first light source 130, or two first light sources 130 arranged opposite to each other, or first light sources 130 located on the same side, without specific limitation. The first light source 130 may be arranged at both ends of the arc surface area 113 along the first direction X in any manner, and may be arranged asymmetrically, for example, each first light source 130 may be arranged alternately left and right; and considering the uniformity of light, the first light source 130 may also be arranged symmetrically at both ends of the arc surface area 113 along the first direction X. That is, in some embodiments, the at least one group of first light sources 130 is symmetrically arranged at both ends of the arc surface area 113 along the first direction X. In a more specific application scenario, the first light source 130 and the second light source 140 in the subsequent embodiments may be specifically an LED light source, or an EEL (edge-emitting laser diode) light source or a VCSEL (vertical cavity surface-emitting laser diode) light source, etc.

[0042] In specific applications, when a detected object such as a finger is placed on the feature recognition component 100, the arc surface area 113 can be used to increase the contact area between the detected object and the flexible sensor 120, which can be beneficial for obtaining more data information and improving the recognition accuracy of the flexible sensor 120. Then, at least one group of first light sources 130 can be used to irradiate the detected object with detection light, and then the detection light is reflected back to the arc surface area 113 by the principle of reflection, and is detected by the flexible sensor 120 disposed in the arc surface area 113, and then the flexible sensor 120 can recognize the corresponding features according to the light intensity and the like.

[0043] In a more specific application scenario, at least one group of first light sources 130 may be a near-infrared light source, and the near-infrared light emitted by the light source enters the finger from the side of the finger, and part of the light is scattered by the skin tissue and emitted from the bottom of the finger, and is detected by a TFT array flat panel detector (i.e., a flexible sensor 120) with infrared response. If the light path passes through a vein, this part of the light will be absorbed, and a shadow will appear on the flat panel detector, forming a clear image of the vein pattern.

[0044] In some embodiments, for the feature recognition component 100, the key is that the intensity of the reflected light must be sufficient for detection, so that the coverage area, shape, etc. of the flexible sensor 120 can be set specifically. Here, since the flexible sensor 120 is set on the curved surface area 113, the curved surface area 113 can be further limited. Figure 3As shown, considering the bendability and lighting efficiency of the flexible sensor 120, the arc angle α corresponding to the arc surface of the arc surface area 113 can be set between 50° and 70°, and the arc length can be set between 30 mm and 50 mm during design. That is, in some embodiments, the arc angle of the arc surface area 113 is 50° to 70°, and the arc length is 30 mm to 50 mm.

[0045] Furthermore, based on the above embodiments, in order to further improve the performance, the arc angle α of the arc surface area 113 is set to 60° and the arc length is set to 43.2 mm, so as to further improve the detection efficiency. That is, in some embodiments, the arc angle of the arc surface area is 60° and the arc length is 43.2 mm.

[0046] In some embodiments, for the same or similar reasons as in the above embodiments, the location and light emitting angle of at least one set of first light sources 130 may be set while adjusting the curved surface area 113, so as to achieve better optical intensity during detection and enable the flexible sensor 120 to better receive information. Figure 4 As shown, the angle θ between at least one group of first light sources 130 and the plane where the working surface 111 is located can be set to be between 20° and 90°, and the vertical distance d between at least one group of first light sources 130 and the middle of the arc surface of the arc surface area 113 is 20mm to 30mm. The middle of the arc surface area here is generally the lowest point position or the center position of the arc surface area, such as Figure 4 As shown, the position where the arc is the lowest in the relatively regular arc region. That is, in some embodiments, the angle θ between the at least one group of first light sources 130 and the working surface 111 is 20° to 90°, and the vertical distance d between the at least one group of first light sources 130 and the middle of the arc of the arc region 113 is 20 mm to 30 mm.

[0047] Furthermore, in order to improve the image clarity, it is necessary to ensure that the detected object such as the finger has the highest radiant illumination and illumination uniformity. Here, the optimal position of at least one group of first light sources 130 can be further determined by optical simulation. In a corresponding manner, the angle θ between at least one group of first light sources 130 and the working surface 111 can be set to 60°, and the vertical distance d between at least one group of first light sources 130 and the middle of the arc surface of the arc surface area 113 can be set to 25.7 mm, so as to further improve the detection effect.

[0048] In more specific application scenarios, such as Figure 5 As shown, it is a schematic diagram of the effect of ray tracing of at least one group of first light sources 130; Figure 6 As shown in FIG. 1 , it is a schematic diagram of the effect of the radiation illumination detection obtained by the finger; Figure 7As shown in FIG. 1 , it is a schematic diagram of the effect of illumination uniformity obtained by the finger. It can be seen from the above figures that the highest irradiance and good illumination uniformity can be achieved by setting the angle θ between at least one group of first light sources 130 and the working surface 111 to 60°. Figure 7 The coordinates in the range of 0 to 1 are used to indicate the position of the finger, except that they indicate different directions. The coordinates in the range of 0 to 0.0002 are used to indicate optical intensity.

[0049] In some embodiments, in order to make a determination as to when to perform feature recognition, such as Figure 1 and Figure 2 As shown, at least one second light source 140 and at least one light detector 150 can be further arranged on the feature recognition component 100. Both can be mainly used to detect whether there is an object to be detected (such as a finger, etc.) placed in the arc surface area 113. At least one second light source 140 emits light for detection. When a finger, etc. is placed, a reflection will be formed, and then received by at least one light detector 150. In this way, it can be determined that the feature recognition component 100 needs to start feature recognition, and then at least one group of first light sources 130 is started, and the flexible sensor 120 is used for detection. In a specific scenario, in order to facilitate detection, at least one second light source 140 and at least one light detector 150 can also be arranged in the arc surface area 113, but their arrangement positions are at the two ends of the second direction Y that is perpendicular to the first direction X (the second direction Y and the first direction X are perpendicular to each other on the plane where the working surface 111 is located), so that when the object to be detected, such as a finger, is extended or placed, it can be detected in time. Afterwards, at least one second light source 140 and at least one light detector 150 can be arranged in only one group, or as shown in FIG. Figure 2 As shown, a group is set at each end of the second direction Y of the arc surface area 113. That is, in some embodiments, the feature recognition component 100 further includes: at least one second light source 140, which is set at both ends of the arc surface area 113 along the second direction Y; wherein the second direction Y and the first direction X are perpendicular to each other on the plane where the working surface 111 is located; at least one light detector 150, which is set adjacent to the at least one second light source 140; the at least one second light source 140 and the at least one light detector 150 are configured to receive the light of the at least one second light source 140 through the at least one light detector 150, and determine whether the at least one group of first light sources 130 starts to emit light.

[0050] Later, in some application scenarios, when performing feature detection, there will often be corresponding differences in light reflection due to individual differences. For example, fingers of different sizes and obesity will inevitably have certain differences in reflection. In some scenarios, multiple images will be required to obtain the best image clarity, which increases the response time of the sensor and reduces efficiency. Specifically, the feature recognition component 100 such as the finger vein sensor generally uses an infrared LED light source (first light source 130) for fill light to obtain a clear vein image. However, due to differences between biological individuals, such as skin color, hemoglobin content and finger size, these factors will affect the absorption and reflection intensity of infrared light, resulting in the failure to obtain a sufficiently clear vein image at the preset light intensity of the first light source 130.

[0051] Furthermore, for at least one second light source 140, based on the functions of the aforementioned embodiments, it can be allowed to continue to illuminate the placed object to be detected, and the at least one light detector 150 can be used to continuously determine the intensity of light reflection, and then the light output intensity of at least one group of first light sources 130 can be adjusted according to the magnitude of the light reflection intensity. That is, in some embodiments, the at least one light detector 150 is also configured to control the light intensity of the at least one group of first light sources 130 according to the light intensity of the at least one second light source 140 received.

[0052] Furthermore, in order to simplify the circuit and ensure the consistency of the driving current, as Figure 8 As shown, at least one group of first light sources 130 and at least one second light source 140 may be arranged in series to ensure that the driving current is the same.

[0053] In more specific application scenarios, such as Figure 8 As shown, two groups of eight first light sources 130 and two second light sources 140 are taken as an example for explanation. First, it can be assumed that the radiation intensity of all light sources is the same, switches SK1 and SK2 are always disconnected, switches SK3 and SK4 are controlled by at least one light detector 150, and when the feature recognition component 100 is powered on and no finger is placed, switches SK3 and SK4 are closed, at least one group of first light sources 130 are all off, and at least one second light source 140 is turned on and emits pulsed near-infrared light at a specific frequency. Since there is no reflection from a finger, it cannot reach the light detector 150 and is judged as "no finger". After placing the finger, the light detector 150 can receive the reflected light from at least one second light source 140 passing through the finger and generate a photocurrent I 2 , it is judged as "there is a finger", the control switches SK3 and SK4 are disconnected, and at least one group of first light sources 130 are all turned on to collect vein images.

[0054] Afterwards, the light path is divided into two parts, wherein the first light path is the light emitted by at least one group of first light sources 130, which is absorbed and scattered by the finger epidermis, blood vessels and other tissues, and then passes through the infrared filter layer and the collimating film layer to reach the flexible sensor 120 (such as a TFT flat panel detector), and the first light path is the light emitted by at least one second light source 140, which is absorbed and scattered by the finger epidermis, blood vessels and other tissues, and then passes through the filter layer to reach the light detector 150. The radiation power of the first light source 130 and the second light source 140 can be set to P, and the loss coefficient of the first light path (including film absorption, shielding, etc.) is k 1 , the loss coefficient of the second optical path is k 2 (Due to different light paths, the loss coefficients are different, but they are all fixed values), the finger reflectivity is r (related to the skin color, hemoglobin content and finger size of the individual finger), and the responsivity of the flexible sensor 120 is R 1 , the photodetector 150 responsivity is R 2 , then the photocurrent I generated by the flexible sensor 120 1 and the photocurrent I generated by the photodetector 150 2 The following relations are satisfied:

[0055]

[0056] The clarity of the vein image depends on the output I of the flexible sensor 120. 1 , which is affected by the reflectivity r of different biological individual fingers. The I output by the light detector 150 2 The size of is used to determine the finger reflectivity r. When the r value is large, the driving current of the first light source 130 and the second light source 140 can be reduced to reduce the radiation power P; when the r value is small, the driving current of the first light source 130 and the second light source 140 can be increased to increase the radiation power P, thereby ensuring that sufficiently clear vein images can be obtained for different fingers.

[0057] Furthermore, in specific applications, by adding an additional detection optical path (composed of a second light source 140 and a light detector 150), which has both triggering and driving current adjustment functions, the driving current adjustment of the first light source 130 is completed before the flexible sensor 120 takes pictures, and the radiation power of the first light source 130 is adaptively controlled. There is no need to take pictures multiple times to screen for the appropriate image clarity, which greatly reduces the sensor response time.

[0058] As can be seen from the above, the feature recognition component provided by the present application specifically includes: a component body, provided with a working surface and a bottom surface opposite to the working surface, the working surface is provided with a curved surface area that bends inward in a first direction; a flexible sensor, provided in the curved surface area; at least one group of first light sources, provided on the working surface, located at both ends of the curved surface area along the first direction, configured to emit light to the side of the working surface away from the bottom surface, and provide light source for the flexible sensor. The present application designs the curved surface area so that when the detected object such as the user's finger or other finger-like structure is placed in the area, it can better fit with the flexible sensor set on the curved surface area, thereby improving the detection accuracy; then, at least one group of first light sources is provided at both ends of the curved surface area along the bending direction to provide detection light, and when the detected object is placed in the area, the light source is provided by at least one group of first light sources, and the light is reflected after passing through the detected object, and then detected by the flexible sensor, thereby completing the detection of the detected object. From this, it can be seen that the present application first increases the contact area between the sensor and the object to be detected by using the curved surface area of ​​the curved surface design, and then uses the light source on the same side to provide detection light, so that the detection instrument emits light from the opposite side to penetrate and illuminate the object to be detected, and adjusts it to emit light from the same side to detect the object to be detected using the reflection principle. This greatly reduces the thickness of the feature recognition component, making the feature recognition component more streamlined and miniaturized, providing a larger design space for the corresponding equipment, and improving the practicability and aesthetics of the equipment.

[0059] Based on the same concept, the present application also provides a feature recognition device, including a feature recognition component as described in any of the aforementioned embodiments.

[0060] The feature recognition device of the above embodiment is used to apply the corresponding feature recognition component in the above embodiment, and has the beneficial effects of the embodiment of the corresponding feature recognition component, which will not be described in detail here.

[0061] It can be understood that the feature recognition device is a product with feature recognition function, and it is generally driven by multiple driving circuits. For example, it can be: finger vein recognition sensor, corresponding medical use device, detection use device, access control system, financial payment device, identity confirmation device, etc.

[0062] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present application (including the claims) is limited to these examples. In line with the concept of the present application, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the embodiments of the present application as described above, which are not provided in detail for the sake of simplicity.

[0063] In addition, to simplify the description and discussion, and in order not to make the embodiments of the present application difficult to understand, the known power supply / ground connection with the integrated circuit (IC) chip and other components may or may not be shown in the provided drawings. In addition, the device can be shown in the form of a block diagram to avoid making the embodiments of the present application difficult to understand, and this also takes into account the fact that the details of the implementation of these block diagram devices are highly dependent on the platform to be implemented in the embodiments of the present application (that is, these details should be fully within the scope of understanding of those skilled in the art). In the case of elaborating specific details (e.g., circuits) to describe exemplary embodiments of the present application, it is obvious to those skilled in the art that the embodiments of the present application can be implemented without these specific details or when these specific details are changed. Therefore, these descriptions should be considered to be illustrative rather than restrictive.

[0064] Although the present application has been described in conjunction with specific embodiments of the present application, many replacements, modifications and variations of these embodiments will be apparent to those skilled in the art from the foregoing description. For example, other memory architectures (e.g., dynamic RAM (DRAM)) may use the embodiments discussed.

[0065] The embodiments of the present application are intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the embodiments of the present application should be included in the scope of protection of the present application.

Claims

1. A feature recognition component, characterized in that: include: The component body is provided with a working surface and a bottom surface opposite to the working surface, and the working surface is provided with a curved surface area that bends inward in a first direction; A flexible sensor is arranged on the arc surface area; At least one group of first light sources is arranged on the working surface, located at two ends of the arc surface area along the first direction, and is configured to emit light to a side of the working surface away from the bottom surface to provide light source for the flexible sensor.

2. The feature recognition component according to claim 1, characterized in that: The arc angle of the arc surface area is 50° to 70°, and the arc length is 30mm to 50mm.

3. The feature recognition component according to claim 2, characterized in that: The arc angle of the arc surface area is 60°, and the arc length is 43.2 mm.

4. The feature recognition component according to claim 1, characterized in that: The included angle between the at least one group of first light sources and the working surface is 20° to 90°, and the vertical distance between the at least one group of first light sources and the middle of the curved surface of the curved surface area is 20 mm to 30 mm.

5. The feature recognition component according to claim 4, characterized in that: The included angle between the at least one group of first light sources and the working surface is 60°, and the vertical distance between the at least one group of first light sources and the middle of the curved surface of the curved surface area is 25.7 mm.

6. The feature recognition component according to claim 1, characterized in that: Also includes: At least one second light source is disposed at two ends of the arc surface area along a second direction; wherein the second direction and the first direction are perpendicular to each other on the plane where the working surface is located; at least one light detector disposed adjacent to the at least one second light source; The at least one second light source and the at least one light detector are configured to receive light from the at least one second light source through the at least one light detector to determine whether the at least one group of first light sources starts to emit light.

7. The feature recognition component according to claim 6, characterized in that: The at least one group of first light sources is connected in series with the at least one second light source.

8. The feature recognition component according to claim 6, characterized in that: The at least one light detector is further configured to control the light intensity of the at least one group of first light sources according to the received light intensity of the at least one second light source.

9. The feature recognition component according to claim 1, characterized in that: The at least one group of first light sources is symmetrically arranged at two ends of the arc surface area along the first direction.

10. A feature recognition device, characterized in that: include: A feature recognition component as claimed in any one of claims 1 to 9.

Images