Palm Recognition Device

Abstract

This application relates to a palm recognition device, which belongs to the technical field of electronic devices. The palm recognition device includes a housing (1), a PCB (2), and a camera (3). Both the PCB (2) and the camera (3) are located inside the housing (1). The housing (1) has a photographing window (120), and the projection of the camera (3) on the photographing window (120) is offset downward with respect to the center point (o) of the photographing window (120).

Description

[Technical field]

[0001] This disclosure claims priority to a Chinese patent application filed on March 24, 2022, bearing application number 202220658952.2 and titled "Palm Recognition Device," the entire contents of which are incorporated herein by reference.

[0002] The present disclosure relates to the technical field of electronic devices, and in particular to palm recognition devices. [Background technology]

[0003] A palm recognition device is a device that takes an image of the palm of a hand with a camera and recognizes the image of the palm.

[0004] For palm recognition devices, a key technical challenge is how to improve the quality of the palm images captured by the palm recognition device. Summary of the Invention [Problem to be solved by the invention]

[0005] The present disclosure provides a palm recognition device. [Means for solving the problem]

[0006] The palm recognition device comprises a housing, a printed circuit board (PCB), and a camera, the housing has a transparent shooting window, the PCB is electrically connected to the camera, both the PCB and the camera are located inside the housing, the camera faces the shooting window, and the projection of the camera on the shooting window is offset downward with respect to the center point of the shooting window. [Brief description of the drawings]

[0007] [Figure 1] FIG. 2 is a schematic diagram of a palm provided in an embodiment of the present disclosure. [Diagram 2] FIG. 2 is a schematic diagram of a palm recognition device provided in an embodiment of the present disclosure. [Diagram 3] FIG. 2 is a schematic diagram of a shooting window of a palm recognition device provided in an embodiment of the present disclosure. [Figure 4] FIG. 2 is a schematic diagram of a shooting window of a palm recognition device provided in an embodiment of the present disclosure. [Diagram 5] 1 is an exploded view of a palm recognition device provided in an embodiment of the present disclosure. [Figure 6] 1 is an exploded view of a palm recognition device provided in an embodiment of the present disclosure. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] In order to more clearly illustrate the objectives, configurations, and advantages of the present disclosure, embodiments of the present disclosure will be described in more detail below with reference to the drawings.

[0009] The terms used in the embodiment part of this disclosure are used only to interpret the examples of this disclosure and are not intended to limit this disclosure. Unless otherwise defined, technical or scientific terms used in the embodiments of this disclosure should have the ordinary meaning understood by a person skilled in the art. The use of similar words such as "one" or "one" in the specification and claims of this disclosure does not represent a limitation of quantity, but represents the presence of at least one. The use of similar words such as "comprise" or "include" means that the element or item appearing first in the sentence covers the elements or items listed before "comprise" or "include", and their equivalents, but does not exclude other elements or items. The use of similar words such as "connection" or "connection" is not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The terms "upper", "lower", "left", "right", etc. are used only to represent relative positional relationships, and the relative positional relationships may change depending on the absolute position of the object being described. Unless otherwise expressly limited, "plurality" refers to two or more.

[0010] A palm recognition device is a device that captures an image of a palm with a camera and recognizes the image of the palm. For a palm recognition device, improving the quality of the palm image captured by the palm recognition device is a prerequisite for improving the recognition speed and recognition accuracy of the palm recognition device.

[0011] Experiments have shown that the quality of palm images captured by a palm recognition device is high when the user points point B, which is the actual center point of the palm, toward the camera of the palm recognition device, as shown in Figure 1. When holding up their palm, users generally consider point A on the palm to be the center point of the palm and point point A toward the center point of the shooting window of the palm recognition device.

[0012] Because the cameras of palm recognition devices in the related art all face the center point of the shooting window, palm images captured by these palm recognition devices are all palm images captured when the cameras are directly facing point A on the palm. The quality of these palm images is low, which affects the recognition speed and recognition accuracy of the palm recognition device, so that when using the palm recognition device, users feel that the recognition is not sensitive and sometimes need to move the palm up and down for recognition.

[0013] In view of the above technical problems, an embodiment of the present disclosure provides a palm recognition device, which captures a palm image with high quality, and is advantageous in improving the recognition speed and recognition accuracy of the palm recognition device.

[0014] Next, a palm recognition device provided in an embodiment of the present disclosure will be described.

[0015] 2, 5, and 6, the palm recognition device includes a housing 1, a printed circuit board (PCB) 2, and a camera 3. The housing 1 has a transparent imaging window 120. The PCB 2 is electrically connected to the camera 3, and both the PCB 2 and the camera 3 are located inside the housing 1. The camera 3 faces the imaging window 120, and the projection of the camera 3 on the imaging window 120 is shifted downward with respect to the center point o of the imaging window 120.

[0016] Here, the embodiments of the present disclosure are not limited to specific applications of the palm recognition device. In some examples, the palm recognition device is used for payment, and in some other examples, the palm recognition device is used as a part of an access control device.

[0017] The housing 1 is a component of the palm recognition device, and is used to support and fix the remaining components of the palm recognition device.

[0018] PCB2 is equipped with electronic modules such as a processor, chips and interfaces, and can recognize the palm image collected by camera 3 and can also control camera 3.

[0019] The camera 3 is used to capture an image of the palm. The embodiments of the present disclosure do not limit the type of the camera 3. In some examples, the camera 3 includes at least one of a two-dimensional camera and a three-dimensional camera. In addition, to improve the quality of the image of the palm captured by the camera 3, the camera 3 may include at least one of an infrared light module and a depth map module.

[0020] The projection of the camera 3 on the photographing window 120 is a projection along the central axis direction of the camera 3, where the central axis of the camera 3 is the main optical axis of the camera 3. The projection of the camera 3 on the photographing window 120 being shifted downward with respect to the center point o of the photographing window 120 may be understood as the intersection of the main optical axis of the camera 3 and the photographing window 120 being shifted downward with respect to the center point o of the photographing window 120.

[0021] According to the configuration provided in the embodiment of the present disclosure, the projection of the camera 3 in the photographing window 120 is shifted downward with respect to the center point o of the photographing window 120, so that when the user points point A on the palm toward the center point o of the photographing window 120, the point on the palm directly facing the camera 3 is located below point A, for example, point B, or a point between points A and B. This improves the quality of the captured image of the palm of the palm recognition device, which is advantageous for improving the recognition speed and recognition accuracy of the palm recognition device. Furthermore, the palm recognition device provided in the embodiment of the present disclosure does not require the user to change their existing habits when holding their palm over the palm recognition device.

[0022] Since the field of view of camera 3 is a cone radiation type, in actual use, even if camera 3 does not directly face point B, a high-quality image of the palm can be obtained.

[0023] In some examples, h is smaller than H. That is, the point directly facing camera 3 is located between points A and B.

[0024] In this way, for users who know that the actual center point of the palm is point B, when they point point B toward center point o of the imaging window 120, the point of the palm directly facing camera 3 will not shift too far away from point A relative to point B, reducing the possibility of a low-quality image of the palm being captured.

[0025] The embodiments of the present disclosure do not limit the distance by which the projection is shifted downward from the center point o. In some examples, as shown in FIG. 3 and FIG. 4, the distance h by which the projection of the camera 3 in the shooting window 120 is shifted downward from the center point o is 5 mm or more and 25 mm or less. By setting 5 mm≦h≦25 mm, it is possible to realize that the above-mentioned h is smaller than H. In other words, by setting 5 mm≦h≦25 mm, the palm recognition device can obtain a high-quality palm image both when recognizing the palm of a user who considers point A to be the center point of the palm and when recognizing the palm of a user who considers point B to be the center point of the palm.

[0026] The distance by which the projection of the camera 3 on the photographing window 120 is shifted downward from the center point o is equivalent to the distance by which the intersection of the main optical axis of the camera 3 and the photographing window 120 is shifted downward from the center point o of the photographing window 120.

[0027] The embodiments of the present disclosure do not limit the number of cameras 3. In some examples, as shown in Figures 2 and 3, there is one camera 3, and the projection of the camera 3 on the shooting window 120 is located on the central axis I of the shooting window 120.

[0028] In some other examples, as shown in FIG. 4, there are two cameras 3, and the projections of the two cameras 3 on the shooting window 120 are symmetrical with respect to the central axis I of the shooting window 120.

[0029] The embodiment of the present disclosure does not limit the shape of the photographing window 120. In some examples, as shown in Figures 2 to 4, the photographing window 120 is circular. Of course, the photographing window 120 may be oval, rectangular, or the like.

[0030] Next, the housing 1 will be described in more detail by way of example.

[0031] 2, 5, and 6, the housing 1 includes a bottom housing 11 and a panel 12. The bottom housing 11 has a storage groove 110, and the panel 12 closes the opening of the storage groove 110 and has a shooting window 120.

[0032] Here, the panel 12 can protect the elements in the storage groove 110 by closing the storage groove 110 of the bottom housing 11. The embodiments of the present disclosure do not limit the type of the panel 12. In some examples, the panel 12 has a touch function and is electrically connected to the PCB 2. This allows a user to send a command to the palm recognition device via the touch panel 12. In some other examples, the panel 12 may not have a touch function. The embodiments of the present disclosure do not limit the material of the panel 12. In some examples, the panel 12 is a glass panel.

[0033] The embodiments of the present disclosure do not limit the application scenario of the palm recognition device. In some examples, the palm recognition device is a desktop device for use on a supporting surface such as a table surface, as shown in Fig. 2. In this case, the panel 12 may be disposed at an angle to the horizontal plane.

[0034] In some other examples, the palm device may be a wall-mounted device for use on a wall, in which case the panel 12 may be arranged vertically.

[0035] In order to improve the interaction experience between a user and the palm recognition device, in some examples, as shown in FIG. 2 , the palm recognition device further includes a lighting member 4, which is located inside the housing 1, surrounds the camera 3, and faces the shooting window 120.

[0036] According to the configuration provided in the embodiment of the present disclosure, by providing the lighting member 4, the palm recognition device can convey information to the user via the lighting member 4.

[0037] For example, when the palm recognition device is used for payment, the lighting member 4 transmits information about the payment to the user. For example, when the user successfully completes the payment, the lighting member 4 emits a green light to indicate the success of the payment.

[0038] 2, the lighting member 4 is annular, for example, circular or rectangular, etc. Exemplarily, the lighting member 4 is annular with a common center point with the photographing window 120.

[0039] In this way, when the lighting member 4 emits light, a ring of light is formed around the camera 3, making the palm recognition device look more beautiful.

[0040] In some examples, the lighting element 4 can emit multiple colors of light, and different colors of light can convey different information, for example, a green light indicates a successful payment, a red light indicates a failed payment, etc.

[0041] In some examples, the lighting member 4 has multiple types of light emission modes, such as flashing light and constant light, and different light emission modes can also convey different information.

[0042] Next, an embodiment of the lighting member 4 will be described by way of example.

[0043] 5 and 6, the lighting member 4 includes a light emitting member 41 and a light guiding ring 42, and the light emitting member 41 is fixed to the PCB 2 and electrically connected to the PCB 2. The light guiding ring 42 surrounds the camera 3 and is located between the shooting window 120 and the light emitting member 41.

[0044] In some examples, the light emitting member 41 can emit light of multiple colors.

[0045] The embodiments of the present disclosure do not limit the principle of the light emitting member 41 emitting light of different colors. In some examples, the lamp bead of the light emitting member 41 may be selected and used as a variable color lamp bead. The embodiments of the present disclosure do not limit the principle of the variable color lamp bead. In some examples, the variable color lamp bead can change the emission color according to the magnitude of the current. In some other examples, the color-changing lamp bead includes three sub-lamp beads of red, green, and blue, and the lighting and extinguishing of the three sub-lamp beads can be controlled to realize the emission of multiple colors.

[0046] The embodiments of the present disclosure do not limit the form of the light emitting member 41. In some examples, the light emitting member 41 is an annular lamp. In other examples, the light emitting member 41 has a plurality of lamp beads, and the plurality of lamp beads are arranged in a circular ring shape.

[0047] The light guide ring 42 serves to uniformly disperse the light emitted from the light emitting member 41 and make the brightness of the formed ring of light uniform.

[0048] In some examples, as shown in FIGS. 5 and 6, the palm recognition device further includes a speaker 5, which is located inside the housing 1 and electrically connected to the PCB 2.

[0049] Here, the speaker 5 may be equipped with one or more speaker elements.

[0050] According to the configuration provided in the embodiment of the present disclosure, the palm recognition device can also convey information to the user through voice by providing the speaker 5. For example, when the user succeeds in payment, the speaker 5 emits a sound indicating that the payment has been successful.

[0051] In some examples, as shown in Figures 5 and 6, the bottom housing 11 has a speaker hole 111, and since the speaker hole 111 faces the speaker 5, sound emitted from the speaker 5 can easily propagate to the outside through the bottom housing 11.

[0052] In some examples, as shown in FIG. 2 , the palm recognition device further includes an electric wire 6, one end of which is inserted inside the housing 1 and electrically connected to the PCB 2, and the other end of which is used for electrically connecting to an external power source.

[0053] In some examples, if there is no battery inside the palm recognition device, the palm recognition device cannot be used normally unless the electric wire 6 is connected to a power source. In this case, the electric wire 6 may be connected to the housing 1 in an undetachable manner.

[0054] In some other examples, if there is a battery inside the palm recognition device, the palm recognition device can be used normally until the battery runs out, even if the electric wire 6 is not connected to a power source. In this case, the electric wire 6 may be detachably connected to the housing 1 and the PCB 2, and the electric wire 6 has plugs on both ends.

[0055] The above are only optional examples of the present disclosure, and do not limit the present disclosure. Various modifications, equivalent replacements, improvements, etc. made within the principle of the present disclosure should all be included within the protection scope of the present disclosure. [Explanation of symbols]

[0056] 1 housing, 11 bottom housing, 110 storage groove, 111 speaker hole, 12 panel, 120 shooting window, o center point, I central axis 2. PCB 3. Camera 4 Lighting member, 41 Light-emitting member, 42 Light-guiding ring 5 Speakers 6 electric wire

Claims

1. A palm recognition device comprising a housing (1), a printed circuit board (PCB) (2), and a camera (3), The housing (1) has a transparent photographing window (120), The PCB (2) is electrically connected to the camera (3), and both the PCB (2) and the camera (3) are located inside the housing (1); The camera (3) faces the imaging window (120), and the projection of the camera (3) in the imaging window (120) is offset downward with respect to the center point (o) of the imaging window (120). Palm recognition device.

2. The projection of the camera (3) in the shooting window (120) is shifted downward from the center point (o) by a distance of 5 mm or more and 25 mm or less. The palm recognition device of claim 1 .

3. The camera (3) is one, and the projection of the camera (3) on the shooting window (120) is located on the central axis (I) of the shooting window (120). The palm recognition device according to claim 1 or 2.

4. The number of cameras (3) is two, and the projections of the two cameras (3) on the shooting window (120) are symmetrical with respect to a central axis (I) of the shooting window (120). The palm recognition device according to claim 1 or 2.

5. The imaging window (120) is circular. The palm recognition device according to claim 1 or 2.

6. The housing (1) includes a bottom housing (11) and a panel (12), The bottom housing (11) has a storage groove (110), The panel (12) closes the opening of the storage groove (110) and has the photographing window (120). The palm recognition device according to claim 1 or 2.

7. The panel (12) is disposed obliquely relative to a horizontal plane. The palm recognition device according to claim 6.

8. Further comprising a lighting member (4), The lighting member (4) is located inside the housing (1), surrounds the camera (3), and faces the photographing window (120). The palm recognition device according to claim 1 or 2.

9. The lighting member (4) includes a light emitting member (41) and a light guiding ring (42), The light emitting member (41) is fixed to the PCB (2) and is electrically connected to the PCB (2); The light guide ring (42) surrounds the camera (3) and is located between the photographing window (120) and the light emitting member (41). The palm recognition device according to claim 8.

10. Further comprising a speaker (5); The speaker (5) is located inside the housing (1) and is electrically connected to the PCB (2). The palm recognition device according to claim 1 or 2.

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