CN107390853B - Electronic device - Google Patents
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- CN107390853B CN107390853B CN201710495961.8A CN201710495961A CN107390853B CN 107390853 B CN107390853 B CN 107390853B CN 201710495961 A CN201710495961 A CN 201710495961A CN 107390853 B CN107390853 B CN 107390853B
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- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/26—Power supply means, e.g. regulation thereof
- G06F1/32—Means for saving power
- G06F1/3203—Power management, i.e. event-based initiation of a power-saving mode
- G06F1/3234—Power saving characterised by the action undertaken
- G06F1/325—Power saving in peripheral device
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
- G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
- G06V40/18—Eye characteristics, e.g. of the iris
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Abstract
The electronic device disclosed by the invention comprises an iris identification module, a ranging sensor and a processor. The iris identification module comprises an infrared light source, and the infrared light source is used for transmitting distance measurement infrared light. The iris identification module and the distance measuring sensor are arranged independently, and the distance measuring sensor is used for receiving distance measuring infrared light reflected by an object to be identified. The processor is used for calculating the current acquisition distance between the iris recognition module and the object to be recognized according to the time difference between the transmitted distance measurement infrared ray and the reflected distance measurement infrared ray, judging whether the current acquisition distance is within a preset distance range, and controlling the iris recognition module to acquire the iris image of the object to be recognized if the current acquisition distance is within the preset range. The electronic device prevents the iris recognition module from collecting the iris image of the object to be recognized all the time, thereby reducing the power consumption of the electronic device.
Description
Technical Field
The present invention relates to the field of consumer electronics technologies, and in particular, to an iris acquisition method and an electronic device.
Background
When the iris identification module carries out iris identification, the iris camera is always in an open state, so that the power consumption of the electronic device is higher.
Disclosure of Invention
The embodiment of the invention provides an electronic device.
An electronic device according to an embodiment of the present invention includes:
the iris identification module comprises an infrared light source, and the infrared light source is used for emitting distance measurement infrared light;
the iris recognition module and the ranging sensor are arranged independently, and the ranging sensor is used for receiving ranging infrared light reflected by an object to be recognized;
and the processor is used for calculating the current acquisition distance between the iris recognition module and the object to be recognized according to the time difference between the transmitted distance measurement infrared ray and the reflected distance measurement infrared ray, judging whether the current acquisition distance is within a preset distance range, and controlling the iris recognition module to acquire the iris image of the object to be recognized if the current acquisition distance is within the preset range.
In some embodiments, the infrared light source comprises a vertical cavity surface emitting laser and the ranging sensor is a receiver of a time-of-flight sensor.
In some embodiments, the iris recognition module further comprises an infrared camera, the infrared light source is further configured to emit an iris recognition infrared light, and the infrared camera is configured to acquire and process the iris recognition infrared light reflected from the object to be recognized so as to acquire an iris image of the object to be recognized.
In some embodiments, the infrared light source emits iris recognition infrared light and the ranging infrared light each have a wavelength of 920nm to 960 nm.
In some embodiments, the electronic device further includes a driver connected to both the infrared light source and the processor, wherein when the infrared camera operates, the processor controls the driver to provide a stable operating current to the infrared light source, and when the distance measuring sensor operates, the processor controls the driver to provide a pulsed operating current to the infrared light source.
In some embodiments, the pulsed operating current comprises a rectangular pulsed current, and the driver is configured to control a time of a rising edge of the rectangular pulsed current to within 2 ns.
In some embodiments, the infrared light source emits ranging infrared light at a first power and the infrared light source emits iris recognition infrared light at a second power, the first power being less than the second power.
In some embodiments, the electronic device further comprises a proximity detection receiver disposed independently of the iris recognition module and the ranging sensor;
the infrared light source is also used for emitting proximity detection infrared light;
the proximity detection receiver is used for receiving the reflected proximity detection infrared light;
and when the proximity detection receiver receives the reflected proximity detection infrared light, the infrared light source is also used for transmitting distance measurement infrared light.
In some embodiments, the distance between the infrared camera and the infrared light source is 20-45mm, the distance between the proximity detection receiver and the infrared light source is 1-15mm, and the distance between the distance measurement sensor and the infrared light source is 1-100 mm.
In some embodiments, the infrared light source emits a proximity detection infrared light at a first power, the infrared light source emits a ranging infrared light at a second power, the infrared light source emits an iris recognition infrared light at a third power, and the second power is greater than the first power and less than the third power.
In some embodiments, under the same voltage, the current range corresponding to the first power is 50-150mA, the current range corresponding to the second power is 100-200mA, and the current range corresponding to the third power is 300-500 mA.
In some embodiments, the operation modes of the electronic device include a first operation mode, a second operation mode and a third operation mode;
when the electronic device is operating in the first operating mode, the infrared light source emits a proximity detection infrared light at the first power, and the proximity detection receiver is configured to receive the reflected proximity detection infrared light;
when the electronic device operates in the second working mode, the infrared light source emits distance measurement infrared light rays at the second power, and the distance measurement sensor is used for receiving distance measurement infrared light rays reflected from an object to be identified;
when the electronic device operates in the third working mode, the infrared light source emits iris recognition infrared light with the third power, and the infrared camera is used for acquiring and processing the iris recognition infrared light reflected from the object to be recognized so as to acquire an iris image of the object to be recognized.
The electronic device of the embodiment of the invention starts the iris recognition module to collect the iris image of the object to be recognized only when the distance between the object to be recognized and the iris recognition module is within the preset distance range (the object to be recognized is positioned in the high-definition acquisition area), so that the iris recognition module is prevented from collecting the iris image of the object to be recognized all the time (when the object to be recognized does not exist in the high-definition acquisition area of the iris recognition module and when the object to be recognized exists in the high-definition acquisition area of the iris recognition module), and the power consumption of the infrared receiver during working is smaller than that of the iris recognition module during collecting the iris image of the object to be recognized, thereby reducing the power consumption of the electronic device.
Additional aspects and advantages of embodiments of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of embodiments of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic plan view of an electronic device according to some embodiments of the invention;
FIG. 2 is a schematic diagram of iris recognition by an electronic device according to some embodiments of the invention;
FIG. 3 is a schematic diagram of iris recognition by an electronic device according to some embodiments of the invention;
FIG. 4 is a schematic diagram of iris recognition by an electronic device in accordance with certain embodiments of the present invention;
FIG. 5 is a schematic diagram of iris recognition by an electronic device according to some embodiments of the invention; and
fig. 6 is a schematic diagram of iris recognition of an electronic device according to some embodiments of the invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
The following disclosure provides many different embodiments or examples for implementing different features of the invention. To simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. Furthermore, the present invention may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, the present invention provides examples of various specific processes and materials, but one of ordinary skill in the art may recognize applications of other processes and/or uses of other materials.
Referring to fig. 1, an electronic device 100 according to an embodiment of the invention includes an iris recognition module 10, a distance measuring sensor 40, and a processor 30. The iris recognition module 10 and the distance measuring sensor 40 are independently installed. The iris identification module 10 comprises an infrared light source 12, and the infrared light source 12 is used for emitting distance measurement infrared light. The ranging sensor 40 is used to receive ranging infrared light reflected from an object to be identified. The processor 30 is configured to calculate a current collecting distance between the iris recognition module 10 and the object to be recognized according to a time difference between the transmitted ranging infrared light and the reflected ranging infrared light, determine whether the current collecting distance is within a preset distance range, and control the iris recognition module 10 to collect an iris image of the object to be recognized if the current collecting distance is within the preset range.
The electronic device 100 includes any one of a mobile phone, a tablet computer, a notebook computer, an intelligent watch, an intelligent bracelet, intelligent glasses, and an intelligent helmet, and may also be an integrated module including the iris recognition module 10 and the distance measuring sensor 40, where the integrated module is used to be installed in electronic devices such as a mobile phone, a tablet computer, a notebook computer, an intelligent watch, an intelligent bracelet, intelligent glasses, or an intelligent helmet. In an embodiment of the invention, the electronic device 100 is a mobile phone. The infrared light source 12 may be a transmitter of a Time of Flight (TOF) sensor, for example, the infrared light source 12 may be a controllable Vertical Cavity Surface Emitting Laser (VCSEL), and the ranging sensor 40 may be a receiver of the TOF sensor.
Referring to fig. 2, when the iris recognition module 10 is in operation, the infrared light source 12 emits an iris recognition infrared light at an angle α, the iris recognition module 10 can collect an iris image of an object to be recognized (here, only human eyes are taken as an example for illustration), and a light area where the iris image is a valid iris image is defined as a valid collection area 102, for example, an area covered by the iris recognition infrared light which is located at a distance of (15-45) cm from the iris recognition module 10.
Wherein, the effective iris image means: (1) the iris image is clear enough, and the clear iris image is beneficial to extracting the characteristic information of the subsequent iris; (2) the iris part in the iris image is complete, and the complete iris image is the premise of obtaining complete iris characteristic information; (3) the ratio of the pixels of the iris part in the iris image to all the pixels of the whole iris image is large enough, and the extraction of the iris characteristic information is facilitated due to the large ratio. And if and only if the iris image simultaneously meets the three conditions, the iris image is considered as a valid iris image. And if one condition is not met, the iris image is not considered as a valid iris image. If the detected iris image is not a valid iris image, the iris may not be completely acquired, or the iris part in the acquired iris image may be smaller.
Referring to fig. 3-4, the infrared light source 12, the distance measuring sensor 40 and the processor 30 work together to collect the distance between the object to be recognized and the iris recognition module 10. When the range sensor 40 is in operation, the infrared light source 12 emits a range infrared light at an angle β, with β < α. The effective acquisition area 102 completely covers the preset distance range. The preset distance range is a range in which the iris recognition module 10 can more accurately capture an iris image of an object to be recognized (hereinafter, referred to as a high-definition capture region 104 of the iris recognition module 10).
That is, the processor 30 calculates the current collecting distance between the iris recognition module 10 and the object to be recognized and the preset distance range according to the time difference between the emitted ranging infrared light and the reflected ranging infrared light, and can determine whether the object to be recognized exists in the high-definition collecting region 104 of the iris recognition module 10. When the current acquisition distance is out of the preset distance range, the object to be identified does not exist in the high-definition acquisition region 104 of the iris identification module 10; when the current collecting distance is within the preset distance range, the object to be recognized exists in the high-definition collecting area 104 of the iris recognition module 10. When the distance between the object to be recognized and the iris recognition module 10 is within the preset distance range, the definition of the iris image of the object to be recognized, which is acquired by the iris recognition module 10, is higher than that of the iris image of the object to be recognized, which is acquired by the iris recognition module 10 when the distance between the object to be recognized and the iris recognition module 10 is outside the preset distance range. Or, when the object to be recognized is located in the high definition capturing region 104, the definition of the iris image of the object to be recognized captured by the iris recognition module 10 is higher than that of the iris image of the object to be recognized captured by the iris recognition module 10 when the object to be recognized is located outside the high definition capturing region 104. The object to be recognized may be an object capable of reflecting infrared light, including any one of a part of a human body, an iris template, and the like.
The effective acquisition region 102 completely covers the high-definition acquisition region 104, that is, the intensity of the received infrared rays of the object to be recognized in the high-definition acquisition region 104 (shown in fig. 4) is stronger than that in the region (shown in fig. 3) of the effective acquisition region 102 other than the high-definition acquisition region 104, so that the iris image of the object to be recognized in the high-definition acquisition region 104 (shown in fig. 4) is clearer than that in the region (shown in fig. 3) of the effective acquisition region 102 other than the high-definition acquisition region 104.
Generally, since the angle β of the ranging infrared light emitted from the infrared light source 12 is smaller than the angle α of the iris recognition infrared light, the power of the infrared light source 12 when operating with the ranging sensor 40 is much smaller than that when operating as part of the iris recognition module 20. That is, the power consumption of the infrared light source 12, the distance measuring sensor 40 and the processor 30 working together is less than the power consumption of the iris recognition module 10 when the iris recognition module 10 collects the iris image, and the electronic device 100 needs to perform operations including iris image comparison, storage and the like on the iris image when the iris recognition module 10 collects the iris image, so that the power consumption of the electronic device 100 when the distance measuring sensor 40 is working and the iris recognition module 10 does not perform image collection is less than the power consumption of the electronic device 100 when the distance measuring sensor 40 is not working and the iris recognition module 10 collects the iris image of the object to be recognized.
The electronic device 100 of the embodiment of the invention starts the iris recognition module 10 to collect the iris image of the object to be recognized only when the distance between the object to be recognized and the iris recognition module 10 is within the preset distance range (the object to be recognized is located in the high-definition acquisition region 104), so as to prevent the iris recognition module 10 from collecting the iris image of the object to be recognized all the time (including when the object to be recognized does not exist in the high-definition acquisition region 104 of the iris recognition module 10 and when the object to be recognized exists in the high-definition acquisition region 104 of the iris recognition module 10), and because the power consumption of the distance measurement sensor 40 during working is smaller than that of the iris recognition module 10 during collecting the iris image of the object to be recognized, the power consumption of the electronic device 100 is reduced.
In some embodiments, the iris recognition module 10 includes an infrared light source 12 and an infrared camera 14, wherein the infrared light source 12 is configured to emit infrared rays for iris recognition. The infrared camera 14 is used for acquiring and processing the iris recognition infrared light reflected from the object to be recognized so as to acquire an iris image of the object to be recognized.
When there is no object to be identified in the high definition capturing area 104 of the iris recognition module 10 (see fig. 3), the infrared light source 12 may be used to emit a ranging infrared light, so that the ranging sensor 40 and the processor 30 can determine that there is an object to be identified in the high definition capturing area 104 when the object to be identified enters the high definition capturing area 104. Referring to fig. 4, when an object to be recognized exists in the high definition capturing area 104 of the iris recognition module 10, the infrared light source 12 may emit infrared rays for iris recognition so that when the object to be recognized can reflect the infrared rays for iris recognition and be captured and processed by the infrared camera 14.
The infrared light source 12 in the iris recognition module 10 of the present embodiment can be used as a light source of the distance measuring sensor 40, and can also be used as a light source for the infrared camera 14 to collect an iris image of an object to be recognized, so that electronic components required by the electronic device 100 are saved, and the cost of the electronic device 100 is saved.
Generally, the infrared light source 12 emits the ranging infrared light and the iris recognition infrared light at the same wavelength, and the infrared light source 12 emits the iris recognition infrared light at a wavelength of 920nm to 960nm, for example, the iris recognition infrared light may have a wavelength of any one of 920nm, 925nm, 930nm, 935nm, 940nm, 945nm, 950nm, 955nm, and 960nm, and preferably, the iris recognition infrared light has a wavelength of 940 nm. Because the natural light contains less infrared rays with the wavelength of 940nm, when the wavelength of the infrared rays for iris recognition emitted by the infrared light source 12 is 940nm, the infrared camera 14 filters the rays except for 940nm by arranging the optical filter, so that only the infrared rays with the wavelength of 940nm can be collected by the infrared camera 14, the influence of the infrared rays which directly enter the infrared camera 14 without being reflected by the iris of the object to be recognized in the natural light on the collection of the iris image is reduced, and the definition of the iris image is further improved.
In some embodiments, the iris recognition module 10 includes an infrared light source 12 and an infrared camera 14, the infrared light source 12 emits a distance measurement infrared light at a first power, and the infrared light source 12 emits an iris recognition infrared light at a second power, wherein the first power is less than the second power.
The electronic device 100 of the present embodiment prevents the infrared light source 12 from emitting the infrared light for iris recognition at the second power all the time (including when there is no object to be recognized in the high definition capturing region 104 of the iris recognition module 10, and when there is an object to be recognized in the high definition capturing region 104 of the iris recognition module 10), thereby further reducing the power consumption of the electronic device 100.
Referring to fig. 1, in some embodiments, the electronic device 100 further includes a proximity detection receiver 20 disposed independently of the iris recognition module 10 and the distance measuring sensor 40. The infrared light source 12 is also used to emit proximity detection infrared light. The proximity detection receiver 20 is for receiving the reflected proximity detection infrared light. The infrared light source 12 is also arranged to emit a ranging infrared light when said reflected proximity detection infrared light is received by the proximity detection receiver 20. After the infrared light source 12 emits the ranging infrared light, the ranging sensor 40 receives the ranging infrared light reflected from the object to be recognized. The processor 30 is configured to calculate a current collecting distance between the iris recognition module 10 and the object to be recognized according to a time difference between the transmitted ranging infrared light and the reflected ranging infrared light, determine whether the current collecting distance is within a preset distance range, and control the iris recognition module 10 to collect an iris image of the object to be recognized if the current collecting distance is within the preset range.
Referring to fig. 4-5, specifically, the range in which the proximity detection receiver 20 can detect the object to be recognized is the preliminary detection range 106, the preliminary detection range 106 completely covers the high-definition acquisition region 104, and the preliminary detection range 106 may be greater than, less than, or equal to the effective acquisition region 102, which is exemplified by the preliminary detection range 106 completely covering the effective acquisition region 102 in the present embodiment (as shown in fig. 5). The infrared light source 12, working in conjunction with the proximity detection receiver 20, is capable of detecting the presence of an object to be identified within the preliminary detection range 106. That is, it is possible to determine whether or not the object to be recognized exists within the preliminary detection range 106, depending on whether or not the proximity detection receiver 20 receives the proximity detection infrared light reflected by the object to be recognized. When the proximity detection receiver 20 does not receive the proximity detection infrared light reflected by the object to be recognized, the object to be recognized does not exist within the preliminary detection range 106 (as shown in fig. 5); when the proximity detection receiver 20 receives the proximity detection infrared light reflected by the object to be recognized, the object to be recognized exists within the preliminary detection range 106 (as shown in fig. 6). When the object to be recognized does not exist in the preliminary detection range 106, it is indicated that the object to be recognized is farther from the high-definition acquisition region 104. When the object to be recognized exists in the initial detection range 106, it is indicated that the object to be recognized is already close to the high definition acquisition region 104 or the object to be recognized is located in the high definition acquisition region 104.
Generally, the infrared light source 12 and the proximity detection receiver 20 work together to determine whether an object to be identified exists within the preliminary detection range 106, and the infrared light source 12, the distance measurement sensor 40 and the processor 30 work together to determine whether an object to be identified exists in the high-precision acquisition region 104. Since the proximity detection receiver 20 only needs to detect whether or not the proximity detection infrared light is reflected back to determine whether or not the object to be recognized exists within the preliminary detection range 106, and the distance measurement sensor 40 needs to receive the distance measurement infrared light reflected from the object to be recognized, the concentration of the distance measurement infrared light emitted from the infrared light source 12 exceeds the proximity detection infrared light emitted from the infrared light source 12, that is, the power of the infrared light source 12 when operating together with the proximity detection sensor 20 is smaller than the power when operating together with the distance measurement sensor 40. Moreover, when the distance measuring sensor 40 is in operation, the processor 30 further needs to calculate the current collecting distance between the iris recognition module 10 and the object to be recognized according to the time difference between the emitted distance measuring infrared ray and the reflected distance measuring infrared ray. Thus, the power consumption of the electronic device 100 when the proximity detection receiver 20 operates is less than the power consumption of the electronic device 100 when the ranging sensor 40 operates.
Referring to fig. 1, in some embodiments, an electronic device 100 includes an iris recognition module 10, a distance measuring sensor 40, and a proximity detection receiver 20, wherein the iris recognition module 10 includes an infrared light source 12 and an infrared camera 14. The distance between the infrared camera 14 and the infrared light source 12 is 20-45mm, and the distance between the infrared camera 14 and the infrared light source 12 may be any one of 20mm, 25mm, 30mm, 35mm, 40mm and 45 mm. The distance between the infrared camera 14 and the infrared light source 12 can be understood as follows: (1) the distance from the center of the infrared camera 14 to the center of the infrared light source 12; (2) distance from the edge of the infrared camera 14 to the center of the infrared light source 12; (3) distance from the center of the infrared camera 14 to the edge of the infrared light source 12; (4) distance from the edge of infrared camera 14 to the edge of infrared light source 12. The distance between the proximity detection receiver 20 and the infrared light source 12 is 1-15mm, wherein the distance between the proximity detection receiver 20 and the infrared light source 12 may be any one of 1mm, 2mm, 5mm, 8mm, 10mm, 12mm, and 15 mm. The distance between the proximity detection receiver 20 and the infrared light source 12 can be understood as: (1) the distance from the center of the infrared camera 14 to the center of the infrared light source 12; (2) the distance from the edge of the proximity detection receiver 20 to the center of the infrared light source 12; (3) the distance from the center of the proximity detection receiver 20 to the edge of the infrared light source 12; (4) the distance from the edge of the proximity detection receiver 20 to the edge of the infrared light source 12. The distance between the distance measuring sensor 40 and the infrared light source 20 is 1-100mm, wherein the distance between the distance measuring sensor 40 and the infrared light source 2 can be any one of 1mm, 10mm, 20mm, 30mm, 40mm, 50mm, 60mm, 70mm, 80mm, 90mm and 100 mm. The distance between the distance measuring sensor 40 and the infrared light source 12 can be understood as follows: (1) the distance from the center of the ranging sensor 40 to the center of the infrared light source 12; (2) the distance from the edge of the ranging sensor 40 to the center of the infrared light source 12; (3) the distance from the center of the ranging sensor 40 to the edge of the infrared light source 12; (4) the distance from the edge of the distance sensor 40 to the edge of the infrared light source 12.
Specifically, a connecting line between the center of the distance measuring sensor 40, the center of the proximity detection receiver 20, the center of the infrared light source 12 and the center of the infrared camera 14 may be a straight line, a triangle, or a quadrangle, or the center of the iris recognition module 10, the center of the distance measuring sensor 40 and the center of the infrared camera 14 form a circle or a triangle around the infrared light source 12.
In some embodiments, infrared light source 12 emits the proximity detection infrared light at a first power, infrared light source 12 emits the ranging infrared light at a second power, and infrared light source 12 emits the iris recognition infrared light at a third power, the second power being greater than the first power and less than the third power.
The electronic device 100 of the present embodiment prevents the infrared light source 12 from emitting the infrared light for iris recognition at the third power all the time (including when there is no object to be recognized within the preliminary detection range 106 of the iris recognition module 10, when there is an object to be recognized within the preliminary detection range 106 of the iris recognition module 10 and outside the high definition capturing area 104, and when there is an object to be recognized within the high definition capturing area 104 of the iris recognition module 10), thereby enabling further reduction of power consumption of the electronic device 100.
In some embodiments, infrared light source 12 emits the proximity detection infrared light at a first power, infrared light source 12 emits the ranging infrared light at a second power, and infrared light source 12 emits the iris recognition infrared light at a third power, the second power being greater than the first power and less than the third power. Under the same voltage, the current range corresponding to the first power is 50-150mA, wherein the current corresponding to the first power can be any one of 50mA, 60mA, 70mA, 80mA, 90mA, 100mA, 110mA, 120mA, 130mA, 140mA and 150 mA; the current range corresponding to the second power is 100-200mA, wherein the current corresponding to the second power can be any one of 100mA, 110mA, 120mA, 130mA, 140mA, 150mA, 160mA, 170mA, 180mA, 190mA and 200 mA; the current range corresponding to the third power is 300-500mA, wherein the current corresponding to the third power can be any one of 300mA, 320mA, 340mA, 360mA, 380mA, 400mA, 420mA, 440mA, 460mA, 480mA and 500 mA. For example: the current corresponding to the first power may be 50mA, correspondingly, the current corresponding to the second power may be 100mA, and the current corresponding to the third power may be 300mA, as long as the first power is less than the second power, and the second power is less than the third power.
The electronic device 100 of the present embodiment prevents the infrared light source 12 from emitting the infrared light for iris recognition at the same current all the time under the same voltage (including when there is no object to be recognized within the preliminary detection range 106 of the iris recognition module 10, when there is an object to be recognized within the preliminary detection range 106 of the iris recognition module 10 and outside the high definition capturing area 104, and when there is an object to be recognized within the high definition capturing area 104 of the iris recognition module 10), thereby enabling further reduction of power consumption of the electronic device 100.
Referring to fig. 1, specifically, the electronic device 100 further includes a driver 60 connected to both the infrared light source 12 and the processor 30, and the driver 60 is used for controlling the operating current of the infrared light source 12. When infrared camera 14 during operation, processor 30 control driver 60 provides stable operating current for infrared light source 12 to make infrared light source 12 send stable iris discernment infrared light, thereby be convenient for infrared camera 14 to gather the stable iris discernment infrared light of treating the discernment object reflection, and then promote the iris image's that infrared camera 14 gathered definition. When the distance measuring sensor 40 works, the processor 30 controls the driver 60 to provide the infrared light source 12 with the pulse-varying working current, so that the infrared light source 12 emits the distance measuring infrared light at intervals, thereby facilitating the processor 30 to obtain the time difference between the emitted distance measuring infrared light and the reflected distance measuring infrared light, and calculating the current collecting distance between the iris recognition module 10 and the object to be recognized according to the time difference. The pulsed operating current may be a rectangular pulse current. When the driver 60 supplies the rectangular pulse current to the infrared light source 12, the driver 60 controls the rising edge time of the rectangular pulse current within 2ns, so that the problem that the processor 30 obtains a large error in the time difference between the emitted distance measurement infrared light and the reflected distance measurement infrared light is solved, and the accuracy of the obtained current acquisition distance is improved.
In some embodiments, the operation modes of the electronic device 100 include a first operation mode, a second operation mode, and a third operation mode. When the electronic device 100 is operating in the first mode of operation, the infrared light source 12 emits a proximity detection infrared light at a first power and the proximity detection receiver 20 is operating. When the electronic device 100 operates in the second operating mode, the infrared light source 12 emits the ranging infrared light at the second power, and the ranging sensor 40 operates. When the electronic device 100 operates in the second operating mode, the infrared light source 12 emits an iris recognition infrared light with a third power, and the infrared camera 14 collects an iris image of an object to be recognized.
The power consumption of the electronic device 100 operating in the second operating mode is greater than the power consumption of the electronic device 100 operating in the first operating mode, and the power consumption of the electronic device 100 operating in the second operating mode is less than the power consumption of the electronic device 100 operating in the third operating mode. The iris acquisition method controls the power consumption of the electronic device 100 operating in the first working mode, the second working mode and the third working mode in sequence to be less than the power consumption of the electronic device 100 operating in the third working mode all the time.
Referring to fig. 1, in some embodiments, the electronic device 100 further includes a visible light camera 50, and the infrared camera 14 can assist the visible light camera 50 to capture images. For example, the depth image may be acquired by using a binocular stereo vision ranging method based on the infrared camera 14 and the visible light camera 50. There is a certain distance between the infrared camera 14 and the visible light camera 50, and the depth information of the object to be shot can be calculated through the parallax between the images respectively obtained by the two cameras. For another example, in a low-light environment, the infrared camera 14 may assist the visible light camera 50 in capturing a clear image, and so on.
Specifically, the embodiments of the present invention may satisfy only one of the above embodiments or a plurality of the above embodiments at the same time, that is, embodiments in which one or more of the above embodiments are combined also belong to the scope of the embodiments of the present invention.
In the description of the specification, reference to the terms "certain embodiments," "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and those skilled in the art can make changes, modifications, substitutions and alterations to the above embodiments within the scope of the present invention, which is defined by the claims and their equivalents.
Claims (9)
1. An electronic device, comprising:
the iris identification module comprises an infrared light source, the infrared light source is used for emitting approaching detection infrared light rays with first power, emitting distance measurement infrared light rays with second power and emitting iris identification infrared light rays with third power, and the second power is larger than the first power and smaller than the third power;
the iris recognition module and the ranging sensor are arranged independently, and the ranging sensor is used for receiving ranging infrared light reflected by an object to be recognized;
the proximity detection receiver is arranged independently of the iris identification module and the distance measurement sensor, and is used for receiving the reflected proximity detection infrared light, and when the proximity detection receiver receives the reflected proximity detection infrared light, the infrared light source is also used for transmitting the distance measurement infrared light;
the processor is used for calculating the current acquisition distance between the iris recognition module and the object to be recognized according to the time difference between the transmitted distance measurement infrared ray and the reflected distance measurement infrared ray, judging whether the current acquisition distance is within a preset distance range, and controlling the iris recognition module to acquire the iris image of the object to be recognized if the current acquisition distance is within the preset distance range;
when the distance measuring sensor works, the angle of the infrared light emitted by the infrared light source for distance measurement is smaller than the angle of the infrared light emitted by the infrared light source for iris recognition when the iris recognition module works.
2. The electronic device of claim 1, wherein the infrared light source comprises a vertical cavity surface emitting laser and the ranging sensor is a receiver of a time-of-flight sensor.
3. The electronic device of claim 1, wherein the iris recognition module further comprises an infrared camera, the infrared light source is further configured to emit an iris recognition infrared light, and the infrared camera is configured to acquire and process the iris recognition infrared light reflected from the object to be recognized to acquire an iris image of the object to be recognized.
4. The electronic device of claim 3, wherein the infrared light source emits iris recognition infrared light and distance measurement infrared light each having a wavelength of 920nm to 960 nm.
5. The electronic device of claim 3, further comprising a driver connected to both the infrared light source and the processor, wherein the processor controls the driver to provide a stable operating current to the infrared light source when the infrared camera is in operation, and controls the driver to provide a pulsed operating current to the infrared light source when the range sensor is in operation.
6. The electronic device of claim 5, wherein the pulsed operating current comprises a rectangular pulsed current, and the driver is configured to control a time of a rising edge of the rectangular pulsed current to within 2 ns.
7. The electronic device of claim 3, wherein the distance between the infrared camera and the infrared light source is 20-45mm, the distance between the proximity detection receiver and the infrared light source is 1-15mm, and the distance between the range sensor and the infrared light source is 1-100 mm.
8. The electronic device as claimed in claim 1, wherein under the same voltage, the current range corresponding to the first power is 50-150mA, the current range corresponding to the second power is 100-200mA, and the current range corresponding to the third power is 300-500 mA.
9. The electronic device of claim 3, wherein the operation modes of the electronic device include a first operation mode, a second operation mode, and a third operation mode;
when the electronic device is operating in the first operating mode, the infrared light source emits a proximity detection infrared light at the first power, and the proximity detection receiver is configured to receive the reflected proximity detection infrared light;
when the electronic device operates in the second working mode, the infrared light source emits distance measurement infrared light rays at the second power, and the distance measurement sensor is used for receiving distance measurement infrared light rays reflected from an object to be identified;
when the electronic device operates in the third working mode, the infrared light source emits iris recognition infrared light with the third power, and the infrared camera is used for acquiring and processing the iris recognition infrared light reflected from the object to be recognized so as to acquire an iris image of the object to be recognized.
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| CN108170207A (en) * | 2017-12-13 | 2018-06-15 | 广东欧珀移动通信有限公司 | For the iris recognition component and electronic equipment of electronic equipment |
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| CN108062524B (en) * | 2017-12-13 | 2022-05-20 | 深圳市欢太科技有限公司 | Iris recognition assembly for electronic device and electronic device |
| CN108074949B (en) * | 2017-12-26 | 2019-08-23 | Oppo广东移动通信有限公司 | Electronic device |
| CN108183984B (en) * | 2017-12-26 | 2020-12-29 | Oppo广东移动通信有限公司 | Input/output module and electronic device |
| CN108616703A (en) * | 2018-04-23 | 2018-10-02 | Oppo广东移动通信有限公司 | Electronic device and its control method, computer equipment and readable storage medium storing program for executing |
| CN109040556A (en) * | 2018-08-22 | 2018-12-18 | Oppo广东移动通信有限公司 | Imaging device and electronic equipment |
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