技术领域Technical Field
本发明涉及指纹识别技术领域，特别涉及一种指纹识别模组的唤醒方法、指纹识别模组和电子装置。The present invention relates to the technical field of fingerprint recognition, and in particular to a fingerprint recognition module wake-up method, a fingerprint recognition module and an electronic device.
背景技术Background Art
目前市场中的指纹识别方式分为刮擦式和按压式，刮擦式指纹识别通过手指划过指纹识别模组采集用户指纹信息，按压式指纹识别通过手指按压芯片表面采集用户指纹信息。Currently, the fingerprint recognition methods on the market are divided into scratch type and press type. Scratch type fingerprint recognition collects user fingerprint information by swiping the finger across the fingerprint recognition module, and press type fingerprint recognition collects user fingerprint information by pressing the finger on the chip surface.
当采用按压式指纹识别方式时，用户正面按压指纹识别模组，手指覆盖整个或大部分模组表面，可通过光学识别、电容式指纹传感器、生物射频等方式获得指纹信息。光学识别方式为，基于光学发射装置发射的光线，射到手指上再反射回机器以获取数据，并对比资料库看是否一致。生物射频方式为，射频传感器通过传感器发射微量的射频信号，穿透手指的表皮层获取里层的纹路以获取指纹信息。采用电容式指纹传感器进行指纹识别的方案是目前比较主流的指纹识别检测方案，具体方法为，通过检测指纹凹凸不平引起的电容变化量(仅仅检测电容变化量)获得指纹信息。When using the press-type fingerprint recognition method, the user presses the fingerprint recognition module from the front, and the finger covers the entire or most of the module surface. The fingerprint information can be obtained through optical recognition, capacitive fingerprint sensor, bio-RF and other methods. The optical recognition method is based on the light emitted by the optical emitting device, which is shot onto the finger and then reflected back to the machine to obtain data, and compare the database to see if it is consistent. The bio-RF method is that the RF sensor transmits a trace amount of RF signal through the sensor, penetrates the epidermis of the finger to obtain the inner layer of the texture to obtain fingerprint information. The solution of using capacitive fingerprint sensor for fingerprint recognition is currently the more mainstream fingerprint recognition detection solution. The specific method is to obtain fingerprint information by detecting the capacitance change caused by the unevenness of the fingerprint (only detecting the capacitance change).
指纹识别模组的工作阶段可以分为休眠模式和工作模式，在休眠模式下，指纹识别模组停止大部分操作以有效降低芯片功耗，在工作模式下，指纹识别模组通过扫描传感器阵列获得指纹信息并进行其它相关操作。The working stages of the fingerprint recognition module can be divided into sleep mode and working mode. In sleep mode, the fingerprint recognition module stops most operations to effectively reduce chip power consumption. In working mode, the fingerprint recognition module obtains fingerprint information by scanning the sensor array and performs other related operations.
使指纹识别模组从休眠模式进入工作模式的过程称为唤醒，传统的唤醒方法有两种：按压检测和扫描检测。The process of making the fingerprint recognition module enter the working mode from the sleep mode is called wake-up. There are two traditional wake-up methods: press detection and scan detection.
如图1所示，图1示出了根据现有技术的一种指纹识别模组的唤醒方法，即按压检测的唤醒方法，包括：As shown in FIG. 1 , FIG. 1 shows a wake-up method of a fingerprint recognition module according to the prior art, that is, a wake-up method of press detection, including:
步骤S10，表示按压检测阶段，在按压检测阶段采用压力传感器定时检测是否发生手指按压。Step S10 represents a press detection stage, during which a pressure sensor is used to periodically detect whether finger press occurs.
步骤S11，判断是否检测到手指按压，若检测到手指按压，则执行步骤S30；若未检测到手指按压，则执行步骤S10。Step S11, determining whether finger pressing is detected, if finger pressing is detected, executing step S30; if finger pressing is not detected, executing step S10.
步骤S30，唤醒指纹识别模组，指纹识别模组开始工作，进一步获取指纹信息并进行其它操作。Step S30, waking up the fingerprint recognition module, the fingerprint recognition module starts working, further acquires fingerprint information and performs other operations.
实际应用中按压检测的唤醒方法虽然功耗交底，但其检测精度低，检测结果受环境因素影响较大，容易出现误触发和漏触发的情况。In actual applications, although the wake-up method of press detection has low power consumption, its detection accuracy is low, the detection results are greatly affected by environmental factors, and it is prone to false triggering and missed triggering.
图2示出了根据现有技术的另一种指纹识别模组的唤醒方法，即扫描检测的唤醒方法，包括：FIG2 shows another wake-up method of a fingerprint recognition module according to the prior art, namely, a wake-up method of scanning detection, including:
步骤S20，在扫描检测阶段采用指纹传感器扫描手指指纹。Step S20, in the scanning detection phase, the fingerprint sensor is used to scan the fingerprint of the finger.
步骤S21，根据步骤S20中的扫描结果判断是否有手指按压，若检测到手指按压，则执行步骤S30；若未检测到手指按压，则执行步骤S20。Step S21, judging whether there is finger pressing according to the scanning result in step S20, if finger pressing is detected, executing step S30; if finger pressing is not detected, executing step S20.
步骤S30，唤醒指纹识别模组，指纹识别模组开始工作，进一步获取指纹信息并进行其它操作。Step S30, waking up the fingerprint recognition module, the fingerprint recognition module starts working, further acquires fingerprint information and performs other operations.
扫描检测通过指纹传感器扫描手指指纹，以检测是否有手指按压。实际应用中扫描检测的唤醒方法精度较高，然而由于需要对若干检测子区域进行扫描并统计结果，涉及较多的电路处理，功耗较大，在功耗要求较高的应用场景下使用受限。Scan detection uses the fingerprint sensor to scan the fingerprint of the finger to detect whether there is a finger pressing. In actual applications, the wake-up method of scan detection has high accuracy. However, since it needs to scan several detection sub-areas and count the results, it involves more circuit processing and consumes more power. Therefore, it is limited in application scenarios with high power consumption requirements.
为解决单纯扫描检测功耗过高，以及单纯按压检测精度低的问题，本发明提出了一种兼具高精度和低功耗的指纹识别模组的唤醒方法、指纹识别模组和电子装置。In order to solve the problem of high power consumption of simple scanning detection and low accuracy of simple pressing detection, the present invention proposes a fingerprint recognition module wake-up method, a fingerprint recognition module and an electronic device with both high accuracy and low power consumption.
发明内容Summary of the invention
鉴于上述问题，本发明的目的在于提供一种兼具高精度和低功耗的指纹识别模组的唤醒方法、指纹识别模组和电子装置。In view of the above problems, an object of the present invention is to provide a fingerprint recognition module wake-up method, a fingerprint recognition module and an electronic device with both high precision and low power consumption.
根据本发明的一方面，提供一种指纹识别模组的唤醒方法，包括：采用压力传感器定时检测是否发生手指按压；在检测到手指按压的情形下，启用指纹传感器扫描手指指纹；以及在基于扫描结果确定手指按压的情形下，唤醒所述指纹识别模组。According to one aspect of the present invention, a method for waking up a fingerprint recognition module is provided, comprising: using a pressure sensor to periodically detect whether finger pressure occurs; when finger pressure is detected, enabling the fingerprint sensor to scan the fingerprint of the finger; and when finger pressure is determined based on the scanning result, waking up the fingerprint recognition module.
可选地，在所述在检测到手指按压的情形下，启用指纹传感器扫描手指指纹的步骤之后，还包括：在未检测到手指按压的时长达到预定时间的情形下，启用指纹传感器扫描手指指纹。Optionally, after the step of enabling the fingerprint sensor to scan the finger fingerprint when finger pressure is detected, the method further includes: enabling the fingerprint sensor to scan the finger fingerprint when the duration of no finger pressure being detected reaches a predetermined time.
根据本发明的另一方面，提供一种指纹识别模组，包括：压力传感器，被配置为重复执行按压检测，并在检测到手指按压时产生第一检测信号；指纹传感器，接收第一使能信号，被配置为在接收到第一使能信号时扫描手指指纹，并在基于扫描结果确定手指按压的情形下，产生第二检测信号；控制单元，接收所述第一检测信号以及所述第二检测信号，根据接收的所述第一检测信号产生所述第一使能信号，以及，根据接收的所述第二检测信号产生唤醒信号，唤醒所述指纹识别模组。According to another aspect of the present invention, a fingerprint recognition module is provided, comprising: a pressure sensor, configured to repeatedly perform press detection and generate a first detection signal when finger press is detected; a fingerprint sensor, receiving a first enable signal, configured to scan a finger fingerprint when the first enable signal is received, and generate a second detection signal when it is determined based on the scan result that the finger is pressed; a control unit, receiving the first detection signal and the second detection signal, generating the first enable signal according to the received first detection signal, and generating a wake-up signal according to the received second detection signal to wake up the fingerprint recognition module.
可选地，所述指纹识别模组，还包括：定时单元，被配置为对所述按压检测的时长进行定时，并在未接收到所述第一检测信号的持续时长达到预定时间时，产生第二使能信号；所述控制单元接收所述第二使能信号，并根据接收的所述第二使能信号产生第一使能信号。Optionally, the fingerprint recognition module also includes: a timing unit, configured to time the duration of the press detection, and generate a second enable signal when the duration of not receiving the first detection signal reaches a predetermined time; the control unit receives the second enable signal and generates a first enable signal based on the received second enable signal.
可选地，所述压力传感器包括电容感应电路，所述电容感应电路包括：电荷转电压电路，所述电荷转电压电路根据所述手指按压产生第一电压信号；比较器，接收所述第一电压信号以及参考电压，当所述第一电压信号大于所述参考电压时，产生所示第一检测信号。Optionally, the pressure sensor includes a capacitance sensing circuit, which includes: a charge-to-voltage circuit, which generates a first voltage signal according to the finger pressure; a comparator, which receives the first voltage signal and a reference voltage, and generates the first detection signal when the first voltage signal is greater than the reference voltage.
根据本发明的又一方面，提供一种触控显示面板，包括触控屏以及指纹识别模组，其中，所述指纹识别模组包括：压力传感器，被配置为重复执行按压检测，并在检测到手指按压时产生第一检测信号；指纹传感器，接收第一使能信号，并被配置为在接收到第一使能信号时扫描手指指纹，并在基于扫描结果确定手指按压的情形下，产生第二检测信号；控制单元，接收所述第一检测信号以及所述第二检测信号，根据接收的所述第一检测信号产生所述第一使能信号，以及，根据接收的所述第二检测信号产生唤醒信号，唤醒所述指指纹识别模组。According to another aspect of the present invention, there is provided a touch display panel, comprising a touch screen and a fingerprint recognition module, wherein the fingerprint recognition module comprises: a pressure sensor, configured to repeatedly perform press detection, and generate a first detection signal when finger press is detected; a fingerprint sensor, receiving a first enable signal, and configured to scan a finger fingerprint when the first enable signal is received, and generate a second detection signal when it is determined based on the scan result that the finger is pressed; a control unit, receiving the first detection signal and the second detection signal, generating the first enable signal according to the received first detection signal, and generating a wake-up signal according to the received second detection signal to wake up the fingerprint recognition module.
可选地，所述指纹识别模组还包括：定时单元，被配置为对所述按压检测的时长进行定时，并在未接收到所述第一检测信号的时长达到预定时间时，产生第二使能信号；所述控制单元接收所述第二使能信号，并根据接收的所述第二使能信号产生第一使能信号。Optionally, the fingerprint recognition module also includes: a timing unit, configured to time the duration of the press detection, and generate a second enable signal when the duration of not receiving the first detection signal reaches a predetermined time; the control unit receives the second enable signal and generates a first enable signal based on the received second enable signal.
可选地，所述触控屏的显示器选自液晶显示器、发光二极管显示器、迷你发光二极管显示器、微发光二极管显示器、量子点发光二极管显示器和有机发光二极管显示器中的一种或几种。Optionally, the display of the touch screen is selected from one or more of a liquid crystal display, a light emitting diode display, a mini light emitting diode display, a micro light emitting diode display, a quantum dot light emitting diode display and an organic light emitting diode display.
根据本发明的再一方面，提供一种电子设备，包括：存储器，存储可被执行的程序指令；处理器，调用所述程序指令能够执行如上所述的指纹识别模组的唤醒方法。According to another aspect of the present invention, an electronic device is provided, comprising: a memory storing executable program instructions; and a processor calling the program instructions to execute the fingerprint recognition module wake-up method as described above.
可选地，所述电子设备选自智能手机、便携式电脑、台式电脑、车载电脑、门禁装置中的一种或几种。Optionally, the electronic device is selected from one or more of a smart phone, a portable computer, a desktop computer, a car computer, and an access control device.
本发明将按压检测与扫描检测相结合，采用定时按压检测加扫描检测的组合唤醒方法，由于定时检测启用压力传感器进行按压检测，与定时检测启用指纹传感器进行扫描检测相比，可以降低功耗。在按压检测初步判定手指按压的情形下启用指纹传感器进行扫描检测，与定时检测启用压力传感器进行按压检测相比，可以有效降低误触发的概率，提高准确性。The present invention combines press detection with scan detection and adopts a combined wake-up method of timed press detection plus scan detection. Since the timed detection enables the pressure sensor for press detection, compared with the timed detection enabling the fingerprint sensor for scan detection, the power consumption can be reduced. When the press detection preliminarily determines that the finger is pressed, the fingerprint sensor is enabled for scan detection, which can effectively reduce the probability of false triggering and improve accuracy compared with the timed detection enabling the pressure sensor for press detection.
进一步的，本发明还在按压检测阶段增加超时判断步骤，即在指纹识别模组的唤醒电路中增加定时单元，若按压检测中未检测到手指按压的持续时长超过预定时间，则启用指纹传感器进行扫描检测，可以有效降低漏触发的概率，进一步提高准确性。Furthermore, the present invention also adds a timeout judgment step in the press detection stage, that is, a timing unit is added to the wake-up circuit of the fingerprint recognition module. If the duration of finger pressure exceeding the predetermined time is not detected during the press detection, the fingerprint sensor is enabled for scanning detection, which can effectively reduce the probability of missed triggering and further improve accuracy.
同时，本发明实施例的指纹识别模组及其唤醒方法，只有在按压检测阶段检测到手指按压或按压检测持续时长超过预定时间时，才进行扫描检测，在保证检测精度的前提下，大幅降低唤醒电路的功耗。At the same time, the fingerprint recognition module and wake-up method of the embodiment of the present invention only perform scanning detection when finger pressing is detected during the pressing detection stage or the pressing detection duration exceeds a predetermined time, thereby greatly reducing the power consumption of the wake-up circuit while ensuring the detection accuracy.
附图说明BRIEF DESCRIPTION OF THE DRAWINGS
通过以下参照附图对本发明实施例的描述，本发明的上述以及其他目的、特征和优点将更为清楚，在附图中：The above and other objects, features and advantages of the present invention will become more apparent through the following description of the embodiments of the present invention with reference to the accompanying drawings, in which:
图1示出了根据现有技术的一种指纹识别模组的唤醒方法；FIG1 shows a method for waking up a fingerprint recognition module according to the prior art;
图2示出了根据现有技术的另一种指纹识别模组的唤醒方法；FIG2 shows another method for waking up a fingerprint recognition module according to the prior art;
图3示出了根据本发明实施例的指纹识别模；FIG3 shows a fingerprint recognition module according to an embodiment of the present invention;
图4示出了图3中压力传感器的电容感应电路的示例性实施例的电路图；FIG. 4 illustrates a circuit diagram of an exemplary embodiment of a capacitive sensing circuit of the pressure sensor of FIG. 3 ;
图5示出了图3中指纹传感器的电路示意图；FIG5 shows a circuit diagram of the fingerprint sensor in FIG3 ;
图6示出了图5中检测子区域的示例性实施例的电路图；FIG6 shows a circuit diagram of an exemplary embodiment of the detection sub-region in FIG5;
图7示出了具有本发明指纹识别模组的触控显示面板的结构示意图；FIG7 shows a schematic structural diagram of a touch display panel having a fingerprint recognition module of the present invention;
图8示出了根据本发明实施例的指纹识别模组的唤醒方法；FIG8 shows a method for waking up a fingerprint recognition module according to an embodiment of the present invention;
图9、图10示出了图8中指纹识别模组的唤醒方法的时间轴示意图。FIG9 and FIG10 are schematic diagrams showing a timeline of the method for waking up the fingerprint recognition module in FIG8 .
具体实施方式DETAILED DESCRIPTION
以下将参照附图更详细地描述本发明的各种实施例。在各个附图中，相同的元件或者模块采用相同或类似的附图标记来表示。为了清楚起见，附图中的各个部分没有按比例绘制。Various embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. In each of the accompanying drawings, the same elements or modules are represented by the same or similar reference numerals. For the sake of clarity, the various parts in the accompanying drawings are not drawn to scale.
应当理解，在以下的描述中，“电路”可包括单个或多个组合的硬件电路、可编程电路、状态机电路和/或能存储由可编程电路执行的指令的元件。当称元件或电路“连接到”另一元件或称元件或电路“连接在”两个节点之间时，它可以直接耦合或连接到另一元件或者可以存在中间元件，元件之间的连接可以是物理上的、逻辑上的，或者其结合。相反，当称元件“直接耦合到”或“直接连接到”另一元件时，意味着两者不存在中间元件。It should be understood that in the following description, a "circuit" may include a single or multiple combined hardware circuits, programmable circuits, state machine circuits, and/or elements capable of storing instructions executed by programmable circuits. When an element or circuit is said to be "connected to" another element or an element or circuit is said to be "connected between" two nodes, it may be directly coupled or connected to another element or there may be an intermediate element, and the connection between the elements may be physical, logical, or a combination thereof. Conversely, when an element is said to be "directly coupled to" or "directly connected to" another element, it means that there is no intermediate element between the two.
同时，在本专利说明书及权利要求当中使用了某些词汇来指称特定的组件。本领域普通技术人员应当可理解，硬件制造商可能会用不同的名词来称呼同一个组件。本专利说明书及权利要求并不以名称的差异来作为区分组件的方式，而是以组件在功能上的差异来作为区分的准则。At the same time, certain words are used in this patent specification and claims to refer to specific components. It should be understood by those skilled in the art that hardware manufacturers may use different terms to refer to the same component. This patent specification and claims do not use differences in names as a way to distinguish components, but rather use differences in components' functions as the criteria for distinction.
此外，还需要说明的是，在本文中，诸如第一和第二之类的关系术语仅仅用来将一个实体或者操作与另一个实体或者操作区分开来，而不一定要求或者暗示这些实体或操作之间存在任何这种实际的关系或者顺序。而且，术语“包括”、“包含”或者其任何其它变体意在涵盖非排他性的包含，从而使得包括一系列要素的过程、方法、物品或者设备不仅包括那些要素，而且还包括没有明确列出的其他要素，或者是还包括为这种过程、方法、物品或者设备所固有的要素。在没有更多限制的情况下，由语句“包括一个……”限定的要素，并不排除在包括所述要素的过程、方法、物品或者设备中还存在另外的相同要素。In addition, it should be noted that, in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or equipment. In the absence of more restrictions, the elements defined by the statement "comprise one..." do not exclude the existence of other identical elements in the process, method, article or equipment including the elements.
图3示出了本发明实施例的指纹识别模组。指纹识别模组200包括控制单元210、压力传感器220、指纹传感器230和定时单元240。3 shows a fingerprint recognition module according to an embodiment of the present invention. The fingerprint recognition module 200 includes a control unit 210 , a pressure sensor 220 , a fingerprint sensor 230 and a timing unit 240 .
压力传感器220被配置为重复执行按压检测，在检测到手指按压的情形下产生第一检测信号touch，包括一个或多个电容感应单路221，参见图4，图4示出了图3中压力传感器的电容感应电路的示例性实施例的电路图。The pressure sensor 220 is configured to repeatedly perform press detection and generate a first detection signal touch when finger press is detected, and includes one or more capacitive sensing circuits 221. See FIG. 4, which shows a circuit diagram of an exemplary embodiment of a capacitive sensing circuit of the pressure sensor in FIG. 3.
电容感应电路221包括电荷转电压电路2211以及比较器2212。感应电极(图中未示出)检测到手指按压时产生触摸感应信号Ct，电压转电荷电路221根据触摸感应信号Ct生成第一电压信号Vt，比较器2212比较第一电压信号Vt和参考电压Vref的大小，若第一电压信号Vt大于参考电压Vref，则判断为检测到手指按压，比较器2212输出第一检测信号touch。The capacitance sensing circuit 221 includes a charge-to-voltage circuit 2211 and a comparator 2212. When the sensing electrode (not shown in the figure) detects finger pressure, a touch sensing signal Ct is generated. The voltage-to-charge circuit 221 generates a first voltage signal Vt according to the touch sensing signal Ct. The comparator 2212 compares the first voltage signal Vt with the reference voltage Vref. If the first voltage signal Vt is greater than the reference voltage Vref, it is determined that a finger pressure is detected, and the comparator 2212 outputs a first detection signal touch.
指纹传感器230接收第一使能信号EN1，根据接收的第一使能信号EN1扫描手指指纹，以判断是否有手指按压，若有手指按压，则产生第一检测信号scan。The fingerprint sensor 230 receives the first enable signal EN1 and scans the fingerprint of the finger according to the received first enable signal EN1 to determine whether there is a finger pressing. If there is a finger pressing, a first detection signal scan is generated.
指纹传感器230包括多个检测子区域，参见图5，图5示出了图3中指纹传感器的电路示意图。多个检测子区域231成M行N列的阵列排列，每个检测子区域231例如选自大小为K*K个像素的矩形区域，M、N和K均为正整数。示例性的，图5中指纹传感器230包括9个检测子区域231，成3行3列的阵列排列。每个检测子区域的大小设置为8*8个像素点，以保证每个检测子区域内至少有一个指纹的脊或者谷。The fingerprint sensor 230 includes a plurality of detection sub-areas, see FIG5 , which shows a circuit diagram of the fingerprint sensor in FIG3 . The plurality of detection sub-areas 231 are arranged in an array of M rows and N columns, and each detection sub-area 231 is selected, for example, from a rectangular area of K*K pixels in size, where M, N and K are all positive integers. Exemplarily, the fingerprint sensor 230 in FIG5 includes 9 detection sub-areas 231, which are arranged in an array of 3 rows and 3 columns. The size of each detection sub-area is set to 8*8 pixels to ensure that there is at least one ridge or valley of a fingerprint in each detection sub-area.
图6示出了图5中检测子区域的示例性实施例的电路图，检测子区域231包括感应电容231a、电荷转电压电路231b以及模数转换电路231c。FIG. 6 shows a circuit diagram of an exemplary embodiment of the detection sub-region in FIG. 5 , where the detection sub-region 231 includes a sensing capacitor 231 a , a charge-to-voltage circuit 231 b , and an analog-to-digital conversion circuit 231 c .
电荷转电压电路231b根据感应电容231a检测到的局部指纹产生扫描电压信号Vs，模数转换电路在时钟信号CLK的控制下根据扫描电压信号Vs生成电压信号Ds。The charge-to-voltage circuit 231 b generates a scanning voltage signal Vs according to the local fingerprint detected by the sensing capacitor 231 a , and the analog-to-digital conversion circuit generates a voltage signal Ds according to the scanning voltage signal Vs under the control of the clock signal CLK.
控制单元210接收第一检测信号touch以及第二检测信号scan，根据接收的第一检测信号touch产生第一使能信号EN1，以启用指纹传感器230扫描手指指纹，根据接收的第二检测信号scan产生唤醒信号wake，以唤醒指纹识别模组200。The control unit 210 receives the first detection signal touch and the second detection signal scan, generates a first enable signal EN1 according to the received first detection signal touch to enable the fingerprint sensor 230 to scan the fingerprint, and generates a wake-up signal wake according to the received second detection signal scan to wake up the fingerprint recognition module 200.
可选地，本发明实施例的指纹识别模组200还包括指纹驱动芯片(图中未示出)，在指纹识别模组200被唤醒后，指纹驱动芯片进一步获取指纹信息并进行其它操作。Optionally, the fingerprint recognition module 200 of the embodiment of the present invention further includes a fingerprint driving chip (not shown in the figure). After the fingerprint recognition module 200 is awakened, the fingerprint driving chip further obtains fingerprint information and performs other operations.
在一种可选的实施例中，控制单元210产生唤醒信号wake以唤醒指纹驱动芯片进行后续其它操作。In an optional embodiment, the control unit 210 generates a wake-up signal wake to wake up the fingerprint driver chip to perform subsequent other operations.
本发明实施例的指纹识别模组还包括定时单元240，用于对压力传感器220的按压检测的时长进行计时，若超过预定时间未接收到第一检测信号touch，则产生第二使能信号EN2。The fingerprint recognition module of the embodiment of the present invention further includes a timing unit 240 for timing the duration of the pressure detection of the pressure sensor 220, and generating a second enable signal EN2 if the first detection signal touch is not received for more than a predetermined time.
控制单元210还接收第二使能信号EN2，并根据接收的第二使能信号EN2产生第一使能信号EN1以启用指纹传感器230扫描手指指纹。The control unit 210 also receives the second enable signal EN2 and generates the first enable signal EN1 according to the received second enable signal EN2 to enable the fingerprint sensor 230 to scan the fingerprint of the finger.
具体地，压力传感器220定时检测是否发生手指按压，若检测到手指按压，则产生第一检测信号touch，控制单元210接收到第一检测信号touch，产生第一使能信号EN1，以启用指纹传感器230进行手指指纹扫描，若基于扫描结果确定有手指按压，则指纹传感器230产生第二检测信号scan，控制单元根据接收的第二检测信号scan产生唤醒信号wake，唤醒指纹识别模组200。Specifically, the pressure sensor 220 periodically detects whether a finger is pressed. If finger pressure is detected, a first detection signal touch is generated. The control unit 210 receives the first detection signal touch and generates a first enable signal EN1 to enable the fingerprint sensor 230 to perform a fingerprint scan. If a finger is pressed based on the scan result, the fingerprint sensor 230 generates a second detection signal scan. The control unit generates a wake-up signal wake based on the received second detection signal scan to wake up the fingerprint recognition module 200.
若基于扫描结果确定没有手指按压，则控制单元不产生唤醒信号wake，压力传感器220继续定时检测是否发生手指按压。If it is determined based on the scanning result that there is no finger pressing, the control unit does not generate the wake-up signal wake, and the pressure sensor 220 continues to periodically detect whether a finger pressing occurs.
由于定时检测启用压力传感器220进行按压检测，与定时检测启用指纹传感器230进行扫描检测相比，可以降低功耗。在按压检测初步判定手指按压的情形下启用指纹传感器230进行扫描检测，与定时检测启用压力传感器进行按压检测相比，可以有效降低误触发的概率，提高准确性。Since the timing detection enables the pressure sensor 220 to perform press detection, power consumption can be reduced compared with the timing detection enabling the fingerprint sensor 230 to perform scan detection. When the press detection preliminarily determines that the finger is pressed, the fingerprint sensor 230 is enabled to perform scan detection, which can effectively reduce the probability of false triggering and improve accuracy compared with the timing detection enabling the pressure sensor to perform press detection.
当压力传感器220超过预定时间未产生第一检测信号touch，即压力传感器220未检测到手指按压的持续时长超过预定时间，则定时单元240产生第二使能信号EN2，控制单元210根据接收的第二使能信号EN2产生第一使能信号EN1，启用指纹传感器230进行手指指纹扫描，若基于扫描结果确定有手指按压，则指纹传感器230产生第二检测信号scan，控制单元根据接收的第二检测信号scan产生唤醒信号wake，唤醒指纹识别模组200。When the pressure sensor 220 does not generate the first detection signal touch for more than a predetermined time, that is, the pressure sensor 220 does not detect that the duration of finger pressure exceeds the predetermined time, the timing unit 240 generates a second enable signal EN2, and the control unit 210 generates a first enable signal EN1 according to the received second enable signal EN2, and enables the fingerprint sensor 230 to perform a fingerprint scan. If it is determined based on the scanning result that a finger is pressed, the fingerprint sensor 230 generates a second detection signal scan, and the control unit generates a wake-up signal wake according to the received second detection signal scan to wake up the fingerprint recognition module 200.
若基于扫描结果确定没有手指按压，则控制单元不产生唤醒信号wake，压力传感器220继续定时检测是否发生手指按压。If it is determined based on the scanning result that there is no finger pressing, the control unit does not generate the wake-up signal wake, and the pressure sensor 220 continues to periodically detect whether a finger pressing occurs.
增加定时单元240后，若按压检测中未检测到手指按压的持续时长超过预定时间，则进行扫描检测，可以有效降低因按压检测精度交底导致漏触发的概率，进一步提高准确性。After adding the timing unit 240, if the duration of finger pressing is not detected to exceed the predetermined time in the pressing detection, a scanning detection is performed, which can effectively reduce the probability of missed triggering due to the accuracy of the pressing detection, and further improve the accuracy.
为了实现上述实施例，本发明还提出一种触控显示面板，如图7所示。In order to implement the above embodiment, the present invention further proposes a touch display panel, as shown in FIG7 .
图7示出了具有本发明指纹识别模组的触控显示面板的结构示意图。如图7所示，触控显示面板10包括指纹识别装置20和触控屏30。FIG7 shows a schematic diagram of the structure of a touch display panel with a fingerprint recognition module of the present invention. As shown in FIG7 , the touch display panel 10 includes a fingerprint recognition device 20 and a touch screen 30 .
指纹识别装置20例如选自指纹识别模组200。The fingerprint recognition device 20 is, for example, selected from a fingerprint recognition module 200 .
可选地，触控屏30例如选自液晶显示器、发光二极管显示器、迷你发光二极管显示器、微发光二极管显示器、量子点发光二极管显示器和有机发光二极管显示器中的一种或几种。Optionally, the touch screen 30 is selected from one or more of a liquid crystal display, a light emitting diode display, a mini light emitting diode display, a micro light emitting diode display, a quantum dot light emitting diode display and an organic light emitting diode display.
为了实现上述实施例，本发明还提出一种指纹识别模组的唤醒方法，如图8所示。In order to implement the above embodiment, the present invention further proposes a method for waking up a fingerprint recognition module, as shown in FIG8 .
首先执行步骤S10，步骤S10为按压检测阶段，采用压力传感器220定时检测是否发生手指按压，包括步骤S11和步骤S12：First, step S10 is executed. Step S10 is a pressure detection stage, and the pressure sensor 220 is used to regularly detect whether a finger is pressed, including steps S11 and S12:
步骤S11，通过压力传感器220定时检测手指按压。若检测到手指按压，则执行步骤S20；若未检测到手指按压则执行步骤S12。Step S11, periodically detecting finger pressure through the pressure sensor 220. If finger pressure is detected, step S20 is executed; if finger pressure is not detected, step S12 is executed.
步骤S12，判断按压检测持续时长是否达到预定时间。若已达到预定时间，则执行步骤S20，若未达到预定时间，则执行步骤S10。Step S12, determining whether the duration of the pressing detection reaches a predetermined time. If it reaches the predetermined time, executing step S20, if it does not reach the predetermined time, executing step S10.
步骤S20为扫描检测阶段，启用指纹传感器230扫描手指指纹，包括步骤S21。Step S20 is a scanning detection phase, in which the fingerprint sensor 230 is enabled to scan the fingerprint of the finger, including step S21.
步骤S21，基于步骤S20的扫描结果判断是否有手指按压，若判断为有手指按压，执行步骤S30；若判断未没有手指按压，执行步骤S10。Step S21, based on the scanning result of step S20, determine whether there is a finger pressing. If it is determined that there is a finger pressing, execute step S30; if it is determined that there is no finger pressing, execute step S10.
步骤S30，唤醒指纹识别模组200，指纹识别模组200开始工作，获取指纹信息并进行其它操作。Step S30, waking up the fingerprint recognition module 200, the fingerprint recognition module 200 starts to work, obtains fingerprint information and performs other operations.
为了更直观地说明本发明的指纹识别模组的唤醒方法，图9、图10示出了图8中唤醒方法的时间轴示意图。本发明实施例的指纹识别模组的唤醒方法，在按压检测持续时长超过预定时间后进行一次扫描检测。To more intuitively illustrate the awakening method of the fingerprint recognition module of the present invention, Figures 9 and 10 show a timeline diagram of the awakening method in Figure 8. The awakening method of the fingerprint recognition module of the embodiment of the present invention performs a scan detection after the pressing detection lasts for more than a predetermined time.
参见图9，指纹识别模组200处于休眠模式。在按压检测阶段，当t3时刻检测到手指按压时，压力传感器220产生第一检测信号touch，控制单元210接收到第一检测信号touch，并根据第一检测信号touch产生第一使能信号EN1，以启用指纹传感器230进行手指指纹扫描，若基于扫描结果确定有手指按压，则指纹传感器230产生第二检测信号scan，t4时刻控制单元根据接收的第二检测信号scan产生唤醒信号wake，唤醒指纹识别模组200。Referring to FIG9 , the fingerprint recognition module 200 is in sleep mode. In the press detection stage, when a finger press is detected at time t3, the pressure sensor 220 generates a first detection signal touch, the control unit 210 receives the first detection signal touch, and generates a first enable signal EN1 according to the first detection signal touch to enable the fingerprint sensor 230 to scan the fingerprint of the finger. If it is determined based on the scanning result that a finger is pressed, the fingerprint sensor 230 generates a second detection signal scan, and at time t4, the control unit generates a wake-up signal wake according to the received second detection signal scan to wake up the fingerprint recognition module 200.
参见图10，当压力传感器220超过预定时间未产生第一检测信号touch，即压力传感器220未检测到手指按压的持续时长超过预定时间，则t5时刻定时单元240产生第二使能信号EN2，控制单元210根据接收的第二使能信号EN2产生第一使能信号EN1，启用指纹传感器230进行手指指纹扫描，若t6时刻基于扫描结果确定有手指按压，则指纹传感器230产生第二检测信号scan，控制单元根据接收的第二检测信号scan产生唤醒信号wake，唤醒指纹识别模组200。Referring to Figure 10, when the pressure sensor 220 does not generate the first detection signal touch for more than a predetermined time, that is, the pressure sensor 220 does not detect that the duration of finger pressure exceeds the predetermined time, the timing unit 240 generates a second enable signal EN2 at time t5, and the control unit 210 generates a first enable signal EN1 according to the received second enable signal EN2, and enables the fingerprint sensor 230 to perform fingerprint scanning of the finger. If it is determined at time t6 that a finger is pressed based on the scanning result, the fingerprint sensor 230 generates a second detection signal scan, and the control unit generates a wake-up signal wake according to the received second detection signal scan to wake up the fingerprint recognition module 200.
若t7时刻基于扫描结果确定没有手指按压，则控制单元不产生唤醒信号wake，压力传感器220继续定时检测是否发生手指按压。If it is determined at time t7 based on the scanning result that there is no finger pressing, the control unit does not generate the wake-up signal wake, and the pressure sensor 220 continues to periodically detect whether a finger pressing occurs.
此处按压检测和扫描检测在时间轴方向上的长度仅仅为了描述更加方便，不应理解为对二者持续时间的具体时长或二者持续时间的比例的限定。The lengths of the press detection and the scan detection in the time axis direction are only for the convenience of description and should not be understood as a limitation on the specific duration of the two or the ratio of the two.
为实现上述指纹识别模组200的唤醒方法，本发明提供一种电子设备，包括存储器和处理器。存储器存储可被执行的程序指令，处理器调用存储器中的程序指令以执行图8所示的唤醒方法，处理器例如包括控制单元210和定时单元240。To implement the above-mentioned wake-up method of the fingerprint recognition module 200, the present invention provides an electronic device, including a memory and a processor. The memory stores executable program instructions, and the processor calls the program instructions in the memory to execute the wake-up method shown in FIG8. The processor includes, for example, a control unit 210 and a timing unit 240.
在一种可行的实施例中，电子设备还包括如图7所示的触控显示面板10。In a feasible embodiment, the electronic device further includes a touch display panel 10 as shown in FIG. 7 .
可选地，电子设备例如选自智能手机、便携式电脑、台式电脑、车载电脑、门禁装置中的一种或几种。Optionally, the electronic device is selected from one or more of a smart phone, a portable computer, a desktop computer, a car computer, and an access control device.
在电子设备选自智能手机的情形下，指纹识别装置20可以位于智能手机的正面、背面或侧面中的任意一面，指纹识别装置20还可以与智能手机的功能按键结合，例如指纹识别装置20与电源键是一种可选的实施例。When the electronic device is a smartphone, the fingerprint recognition device 20 can be located on any of the front, back or sides of the smartphone. The fingerprint recognition device 20 can also be combined with the function buttons of the smartphone. For example, the fingerprint recognition device 20 and the power button are an optional embodiment.
综上所述，现有技术的唤醒方法中，按压检测功耗低，但检测结果受环境因素影响较大，容易出现误触发和漏触发的情况，精度较低；扫描检测精度高，但是涉及较多电路处理，功耗大，不适用于对功耗要求高的应用场景。To sum up, among the wake-up methods in the prior art, press detection has low power consumption, but the detection results are greatly affected by environmental factors, and are prone to false triggering and missed triggering, and have low accuracy; scanning detection has high accuracy, but involves more circuit processing and consumes high power, and is not suitable for application scenarios with high power consumption requirements.
本发明将按压检测与扫描检测相结合，采用定时按压检测加扫描检测的组合唤醒方法，由于定时检测启用压力传感器220进行按压检测，与定时检测启用指纹传感器230进行扫描检测相比，可以降低功耗。在按压检测初步判定手指按压的情形下启用指纹传感器230进行扫描检测，与定时检测启用压力传感器220进行按压检测相比，可以有效降低误触发的概率，提高准确性。The present invention combines press detection with scan detection and adopts a combined wake-up method of timed press detection plus scan detection. Since the timed detection enables the pressure sensor 220 for press detection, compared with the timed detection enabling the fingerprint sensor 230 for scan detection, power consumption can be reduced. When the press detection preliminarily determines that the finger is pressed, the fingerprint sensor 230 is enabled for scan detection, which can effectively reduce the probability of false triggering and improve accuracy compared with the timed detection enabling the pressure sensor 220 for press detection.
进一步的，本发明还在按压检测阶段增加超时判断步骤，即在指纹识别模组200中增加定时单元240，若按压检测中未检测到手指按压的持续时长超过预定时间，则进行扫描检测，可以有效降低因按压检测精度低导致漏触发的概率，进一步提高准确性。Furthermore, the present invention also adds a timeout judgment step in the press detection stage, that is, a timing unit 240 is added to the fingerprint recognition module 200. If the duration of finger press is not detected to exceed the predetermined time during the press detection, a scanning detection is performed, which can effectively reduce the probability of missed triggering due to low press detection accuracy and further improve accuracy.
同时，本发明实施例的指纹识别模组及其唤醒方法，只有在按压检测阶段检测到手指按压或按压检测持续时长超过预定时间时，才进行扫描检测，在保证检测精度的前提下，大幅降低唤醒电路的功耗。At the same time, the fingerprint recognition module and wake-up method of the embodiment of the present invention only perform scanning detection when finger pressing is detected during the pressing detection stage or the pressing detection duration exceeds a predetermined time, thereby greatly reducing the power consumption of the wake-up circuit while ensuring the detection accuracy.
应当说明，本领域普通技术人员可以理解，本文中使用的与电路运行相关的词语“期间”、“当”和“当……时”不是表示在启动动作开始时立即发生的动作的严格术语，而是在其与启动动作所发起的反应动作(reaction)之间可能存在一些小的但是合理的一个或多个延迟，例如各种传输延迟等。本文中使用词语“大约”或者“基本上”意指要素值(element)具有预期接近所声明的值或位置的参数。然而，如本领域所周知的，总是存在微小的偏差使得该值或位置难以严格为所声明的值。本领域已恰当的确定了，至少百分之十(10％)(对于半导体掺杂浓度，至少百分之二十(20％))的偏差是偏离所描述的准确的理想目标的合理偏差。当结合信号状态使用时，信号的实际电压值或逻辑状态(例如“1”或“0”)取决于使用正逻辑还是负逻辑。It should be noted that it will be understood by those skilled in the art that the words "during", "when" and "when..." used in this article in connection with the operation of the circuit are not strict terms indicating an action that occurs immediately when the start-up action begins, but that there may be some small but reasonable delay or delays between it and the reaction action initiated by the start-up action, such as various transmission delays, etc. The words "approximately" or "substantially" used in this article mean that the element value has a parameter that is expected to be close to the declared value or position. However, as is well known in the art, there are always slight deviations that make it difficult for the value or position to be strictly the declared value. It has been properly determined in the art that a deviation of at least ten percent (10%) (for semiconductor doping concentrations, at least twenty percent (20%)) is a reasonable deviation from the accurate ideal target described. When used in conjunction with a signal state, the actual voltage value or logic state (e.g., "1" or "0") of the signal depends on whether positive logic or negative logic is used.
依照本发明的实施例如上文，这些实施例并没有详尽叙述所有的细节，也不限制该发明仅为的具体实施例。显然，根据以上描述，可作很多的修改和变化。本说明书选取并具体描述这些实施例，是为了更好地解释本发明的原理和实际应用，从而使所属技术领域技术人员能很好地利用本发明以及在本发明基础上的修改使用。本发明的保护范围应当以本发明权利要求及其等效物所界定的范围为准。According to the embodiments of the present invention, as described above, these embodiments do not describe all the details in detail, nor do they limit the invention to specific embodiments. Obviously, many modifications and changes can be made based on the above description. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can make good use of the present invention and the modified use based on the present invention. The scope of protection of the present invention shall be based on the scope defined by the claims of the present invention and their equivalents.
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110505225.2ACN113239777B (en) | 2021-05-10 | 2021-05-10 | Awakening method of fingerprint identification module, fingerprint identification module and electronic device |
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110505225.2ACN113239777B (en) | 2021-05-10 | 2021-05-10 | Awakening method of fingerprint identification module, fingerprint identification module and electronic device |
| Publication Number | Publication Date |
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| CN113239777A CN113239777A (en) | 2021-08-10 |
| CN113239777Btrue CN113239777B (en) | 2024-10-29 |
| Application Number | Title | Priority Date | Filing Date |
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| CN202110505225.2AActiveCN113239777B (en) | 2021-05-10 | 2021-05-10 | Awakening method of fingerprint identification module, fingerprint identification module and electronic device |
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