CN115690863A - Fingerprint detection device, fingerprint chip, display device and electronic equipment - Google Patents
Fingerprint detection device, fingerprint chip, display device and electronic equipment Download PDFInfo
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- CN115690863A CN115690863A CN202211413870.2A CN202211413870A CN115690863A CN 115690863 A CN115690863 A CN 115690863A CN 202211413870 A CN202211413870 A CN 202211413870A CN 115690863 A CN115690863 A CN 115690863A
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Abstract
The utility model relates to a fingerprint detection device, fingerprint chip, display device and electronic equipment is applied to display panel, the device includes: the switching module is connected with the optical fingerprint chip and used for switching the working mode of the optical fingerprint chip into a touch detection mode or a fingerprint acquisition mode, wherein when the optical fingerprint chip works in the touch detection mode, the optical fingerprint chip is used for detecting whether the display panel is touched or not; when the optical fingerprint chip works in the fingerprint acquisition mode, the optical fingerprint chip is used for fingerprint acquisition. According to the embodiment of the disclosure, whether the display panel is touched or not can be detected by using the optical fingerprint chip, and fingerprint collection is performed, so that compared with the related art, the use of a touch sensor or a pressure sensor is saved, the cost is saved, the process complexity can be reduced, the response speed is increased, and the overall power consumption is reduced.
Description
Technical Field
The present disclosure relates to the field of fingerprint identification technologies, and in particular, to a fingerprint detection device, a fingerprint chip, a display device, and an electronic device.
Background
The current optical fingerprint exposure control needs control and participation of a system end, whether a finger presses a designated area or not needs to be determined through a touch sensor or a pressure sensor of the system end, the system end is informed by a sensor or the fingerprint chip is informed through an on-chip bus, and finally the fingerprint chip is controlled by the system end to start image acquisition.
Disclosure of Invention
In view of the above, the present disclosure provides a fingerprint detection apparatus applied in a display panel, the apparatus including:
a switching module connected to the optical fingerprint chip for switching the working mode of the optical fingerprint chip to a touch detection mode or a fingerprint collection mode,
when the optical fingerprint chip works in the touch detection mode, the optical fingerprint chip is used for detecting whether the display panel is touched or not; when the optical fingerprint chip works in the fingerprint acquisition mode, the optical fingerprint chip is used for fingerprint acquisition.
In one possible implementation, the switching module is configured to:
when the optical fingerprint chip works in the touch detection mode, whether the display panel is touched or not is judged by utilizing the optical fingerprint chip, and under the condition that the touch is determined, the working mode of the optical fingerprint chip is switched to be the fingerprint acquisition mode, so that the optical fingerprint chip acquires fingerprints.
In one possible implementation, the switching module is configured to:
when the optical fingerprint chip works in the fingerprint acquisition mode, if the display panel enters the dormancy state or the duration that the optical fingerprint chip does not detect the fingerprint reaches the preset duration, the working mode of the optical fingerprint chip is switched to be the touch detection mode.
In a possible implementation manner, the switching module includes a plurality of switching units, each of which includes a plurality of first multiplexers, a plurality of first switches, and each of which is connected to a corresponding detection unit of the optical fingerprint chip, respectively, wherein,
the first selection end of each first multiplexer is connected with a corresponding pixel of the display panel, the second selection end of each first multiplexer is grounded, the common output end of each first multiplexer is connected with the first end of the first capacitor of the corresponding detection unit, the control end of each first multiplexer is used for receiving a first multi-path control signal,
the control end of each first switch is used for receiving a first switch control signal, the first end of each first switch is grounded through the corresponding photodiode of the detection unit, the second end of each first switch is connected to a first common node of the second end of the first capacitor and the first end of the second capacitor of the detection unit, and the first common node is connected to the integrating circuit of the detection unit.
In a possible implementation manner, in the touch detection mode, each first multi-channel control signal controls each first multi-channel selector to connect to a corresponding pixel, and each first switch control signal controls each first switch to be turned off.
In a possible implementation manner, in the fingerprint acquisition mode, each first multipath control signal controls each first multiplexer to be connected to ground, and each first switch control signal controls each first switch to be turned on.
In one possible implementation, each switching unit further includes a second multiplexer and a plurality of second switches, wherein,
the first common node of each switching unit is respectively connected to each selection end of the second multiplexer, the common output end of the second multiplexer is connected to the integrating circuit of the first detection unit, the control end of the second multiplexer is used for receiving a second multi-path control signal, the first detection unit is any one of the plurality of detection units,
and the first common nodes of other detection units except the first detection unit are connected to the corresponding integration circuits through the first end of the second switch and the second end of the second switch, and the control end of the second switch is used for receiving a second switch control signal.
In one possible implementation, in the touch detection mode,
in the touch detection mode, each first multi-path control signal controls each first multi-path selector to be connected with a corresponding pixel, each first switch control signal controls each first switch to be switched off, each second switch control signal controls each second switch to be switched off, and the second multi-path control signal controls the second multi-path selector to select any one first common node to be connected with the integrating circuit of the first detection unit;
in the fingerprint collection mode, each first multipath control signal controls each first multiplexer to be connected with the ground, each first switch control signal controls each first switch to be conducted, each second switch control signal controls each second switch to be conducted, and the second multipath control signal controls the second multipath selector to select a first common node of the first detection unit to be connected with an integrating circuit of the first detection unit.
In one possible implementation, the apparatus further includes:
a control module to:
when the optical fingerprint chip works in the touch detection mode, acquiring an integral result of each integral circuit in a preset period, and judging whether touch occurs according to the integral result and a preset touch threshold value;
and under the condition that the integral result reaches the preset touch threshold value, determining that touch occurs, switching the working mode of the optical fingerprint chip into the fingerprint acquisition mode, opening a light source assembly, and acquiring the fingerprint by using the optical fingerprint chip after delaying the preset time.
In one possible implementation, the display panel includes at least one of a liquid crystal display panel, a micro-led display panel, a mini-led display panel, a quantum dot led display panel, an organic led display panel, a cathode ray tube display panel, a digital light processing display panel, a field emission display panel, a plasma display panel, an electrophoretic display panel, an electrowetting display panel, and a small-pitch display panel.
According to another aspect of the present disclosure, there is provided a fingerprint chip including the fingerprint detection device.
According to another aspect of the present disclosure, there is provided a display device including the fingerprint chip.
According to another aspect of the present disclosure, there is provided an electronic device including the display device.
According to another aspect of the present disclosure, an electronic device is provided, which includes any one of a display, a smart phone, a smart watch, a smart bracelet, a tablet computer, a notebook computer, an integrated computer, an access control device, and an electronic door lock.
The disclosed embodiment provides a fingerprint detection device, the device includes: the switching module is connected with the optical fingerprint chip and used for switching the working mode of the optical fingerprint chip into a touch detection mode or a fingerprint acquisition mode, wherein when the optical fingerprint chip works in the touch detection mode, the optical fingerprint chip is used for detecting whether the display panel is touched; when the optics fingerprint chip work is in during the fingerprint collection mode, optics fingerprint chip is used for carrying out fingerprint collection, switches through switching module the mode of operation of optics fingerprint chip is touch detection mode or fingerprint collection mode, can utilize optics fingerprint chip to detect whether display panel takes place the touch, and carry out fingerprint collection, compare in the use that relevant art has saved touch sensor or pressure sensor, practiced thrift the cost to can reduce the flow complexity, thereby improve response speed and reduce whole consumption.
Other features and aspects of the present disclosure will become apparent from the following detailed description of exemplary embodiments, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate exemplary embodiments, features, and aspects of the disclosure and, together with the description, serve to explain the principles of the disclosure.
Fig. 1 shows a schematic diagram of related art fingerprint acquisition.
Fig. 2 shows a block diagram of a fingerprint detection device according to an embodiment of the present disclosure.
FIG. 3 shows a schematic diagram of one detection unit of an optical fingerprint chip according to an embodiment of the present disclosure.
Fig. 4 shows a schematic diagram of a fingerprint detection device according to an embodiment of the present disclosure.
Fig. 5 shows a schematic diagram of touch area division in a display panel according to an embodiment of the present disclosure.
Fig. 6 shows a schematic diagram of a fingerprint detection device according to an embodiment of the present disclosure.
Fig. 7 shows a schematic diagram of a fingerprint detection device according to an embodiment of the present disclosure.
Detailed Description
Various exemplary embodiments, features and aspects of the present disclosure will be described in detail below with reference to the accompanying drawings. In the drawings, like reference numbers indicate functionally identical or similar elements. While the various aspects of the embodiments are presented in drawings, the drawings are not necessarily drawn to scale unless specifically indicated.
In the description of the present disclosure, it is to be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, as used herein, refer to an orientation or positional relationship indicated in the drawings, which is solely for the purpose of facilitating the description and simplifying the description, and does not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and, therefore, should not be taken as limiting the present disclosure.
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 to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present disclosure, "a plurality" means two or more unless specifically limited otherwise.
In the present disclosure, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integral; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present disclosure can be understood by those of ordinary skill in the art as appropriate.
The term "and/or" herein is merely an association relationship describing an associated object, and means that there may be three relationships, for example, a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the term "at least one" herein means any one of a plurality or any combination of at least two of a plurality, for example, including at least one of a, B, and C, and may mean including any one or more elements selected from the group consisting of a, B, and C.
Referring to fig. 1, fig. 1 is a schematic diagram illustrating fingerprint acquisition according to the related art.
As shown in fig. 1, when a Touch control system in the related art needs to be in a sleep state, a Touch Sensor (Touch Sensor) or a pressure Sensor needs to detect capacitance change or voltage change of an appointed area to determine whether finger Touch occurs, when it is determined that finger Touch occurs, an interrupt is triggered to wake up the system (the corresponding time in the process is long), after the system is woken up, a display device is notified to turn on a screen or a light source (light up), the system is informed that preparation of the system is completed, then a system end sends a picture collection command to control a fingerprint module to start collecting images after the light source is determined to be turned on, and after image collection is completed, the system takes out image data from the fingerprint module.
As can be seen from the above description, in the related art, one-time fingerprint acquisition has a long flow, takes a lot of time, and needs to be completed by the cooperation of an external sensor (a touch sensor or a pressure sensor).
The disclosed embodiment provides a fingerprint detection device, the device includes: the switching module is connected with the optical fingerprint chip and used for switching the working mode of the optical fingerprint chip into a touch detection mode or a fingerprint acquisition mode, wherein when the optical fingerprint chip works in the touch detection mode, the optical fingerprint chip is used for detecting whether the display panel is touched; when the optics fingerprint chip work is in during the fingerprint collection mode, optics fingerprint chip is used for carrying out fingerprint collection, switches through switching module the mode of operation of optics fingerprint chip is touch detection mode or fingerprint collection mode, can utilize optics fingerprint chip to detect whether display panel takes place the touch, and carry out fingerprint collection, compare in the use that relevant art has saved touch sensor or pressure sensor, practiced thrift the cost to can reduce the flow complexity, thereby improve response speed and reduce whole consumption.
The specific type of the display panel is not limited in the embodiments of the present disclosure, and in a possible implementation manner, the display panel may include at least one of a liquid crystal display panel, a micro light emitting diode display panel, a mini light emitting diode display panel, a quantum dot light emitting diode display panel, an organic light emitting diode display panel, a cathode ray tube display panel, a digital light processing display panel, a field emission display panel, a plasma display panel, an electrophoresis display panel, an electrowetting display panel, a small-pitch display panel, and the like.
Referring to fig. 2, fig. 2 shows a block diagram of a fingerprint detection device according to an embodiment of the present disclosure.
The device is applied to a display panel, and as shown in fig. 2, the device includes:
a switching module 10 connected to the optical fingerprint chip 20 for switching the working mode of the optical fingerprint chip 20 to a touch detection mode or a fingerprint collection mode,
when the optical fingerprint chip 20 works in the touch detection mode, the optical fingerprint chip 20 is used for detecting whether the display panel is touched; when the optical fingerprint chip 20 operates in the fingerprint acquisition mode, the optical fingerprint chip 20 is used for fingerprint acquisition.
The embodiment of the present disclosure does not limit the specific implementation manner of the optical fingerprint chip 20, and does not limit the specific implementation manner of the switching module 10, and a person skilled in the art can select the required optical fingerprint chip 20 according to actual conditions and needs, and implement the switching module 10 in a suitable manner, as long as the switching module 10 can complete its function, that is, can switch the working mode of the optical fingerprint chip 20 to a touch detection mode or a fingerprint acquisition mode, so that when the optical fingerprint chip 20 works in the touch detection mode, the optical fingerprint chip 20 is used to detect whether the display panel is touched; when the optical fingerprint chip 20 operates in the fingerprint acquisition mode, the optical fingerprint chip 20 is used for fingerprint acquisition.
In one possible implementation, the switching module 10 may be configured to:
when the optical fingerprint chip 20 operates in the touch detection mode, the optical fingerprint chip 20 is used to determine whether the display panel is touched, and when the touch is determined, the operating mode of the optical fingerprint chip 20 is switched to the fingerprint collection mode, so that the optical fingerprint chip 20 collects fingerprints.
Therefore, the embodiment of the present disclosure does not need to additionally provide a touch sensor or a pressure sensor, i.e., touch detection can be achieved, and whether finger (or other object) touch occurs or not is determined, so as to switch the working mode of the optical fingerprint chip 20 to the fingerprint collection mode, so that the optical fingerprint chip 20 collects fingerprints.
In one possible implementation, the switching module 10 may be configured to:
when the optical fingerprint chip 20 operates in the fingerprint collection mode, if the display panel enters the sleep mode or the duration that the optical fingerprint chip 20 does not detect a fingerprint reaches a preset duration, the operating mode of the optical fingerprint chip 20 is switched to the touch detection mode.
When the optical fingerprint chip 20 operates in the fingerprint collection mode, if the display panel is not operated to enter the sleep mode or set to the sleep mode by a user for a long time, or the duration that the optical fingerprint chip 20 does not detect a fingerprint reaches a preset duration, the embodiment of the disclosure may switch the operating mode of the optical fingerprint chip 20 to the touch detection mode through the switching module 10, so that the optical fingerprint chip 20 periodically performs touch detection.
The following description of the optical fingerprint chip 20 and the switching module 10 is provided as an example, it should be understood that the switching module 10 may be correspondingly configured for different types of optical fingerprint chips 20, and the description of the optical fingerprint chip 20 and the corresponding switching module 10 should not be construed as limiting the present disclosure.
Referring to fig. 3, fig. 3 is a schematic diagram illustrating a detection unit of an optical fingerprint chip according to an embodiment of the disclosure.
In one example, as shown in fig. 3, each detecting unit may include a photodiode D1, a first capacitor Cs, a second capacitor Cc, and an integrating circuit, the integrating circuit is composed of an operational amplifier Amp, a third capacitor Cf, a third switch RST and a fourth switch Q4, wherein an anode of the photodiode D1 and a first end of the first capacitor Cs are grounded, a cathode of the photodiode D1 is connected to a second end of the first capacitor Cs, a first end of the second capacitor Cc and a first input end of the integrating circuit, a second end of the second capacitor Cc may be connected to other circuits such as a digital-to-analog converting circuit DAC, a first input end of the integrating circuit (i.e., a first input end of the operational amplifier Amp) may also be connected to a first end of the third capacitor Cf and a first end of the third switch Q4, a second input end of the operational amplifier Amp is grounded, an output end of the operational amplifier Amp is connected to a second end of the third switch Cf, a first end of the third switch Q4, a control end of the third switch RST may be used for receiving a control signal RST, and the integrating circuit may receive an external control signal VOUT RST signal (i.e., the integrating circuit 30 is used for enabling the integrating circuit to output the integrating circuit for outputting the integrating signal VOUT 3 or not receiving the integrating signal RST).
Referring to fig. 4, fig. 4 is a schematic diagram of a fingerprint detection device according to an embodiment of the disclosure.
In one possible implementation, as shown in fig. 4, the switching module 10 may include a plurality of switching units, each of which may include a plurality of first multiplexers MUX1 and a plurality of first switches Q1, each of which is connected to a corresponding detecting unit of the optical fingerprint chip 20, wherein,
the first selection terminal of each first multiplexer MUX1 is connected to a corresponding pixel of the display panel, the second selection terminal of each first multiplexer MUX1 is grounded, the common output terminal of each first multiplexer MUX1 is connected to the first terminal of the first capacitor Cs of the corresponding detection unit, the control terminal of each first multiplexer MUX1 is configured to receive the first multi-path control signal Smux1,
the control terminal of each first switch Q1 is configured to receive the first switch control signal Sq1, the first terminal of each first switch Q1 is grounded through the photodiode D1 of the corresponding detection unit, the second terminal of each first switch Q1 is connected to a first common node between the second terminal of the first capacitor Cs of the detection unit and the first terminal of the second capacitor Cc, and the first common node is connected to the integration circuit of the detection unit.
Referring to fig. 5, fig. 5 is a schematic diagram illustrating a touch area in a display panel according to an embodiment of the disclosure.
For example, as shown in fig. 5, the touch area in the display panel may be divided into a plurality of pixel units, each pixel unit includes N connected pixels, N ≧ 1, and each pixel unit corresponds to each switching unit.
In one example, as shown in fig. 5 and 4, taking any one pixel unit in fig. 5 as an example, the pixel unit includes pixels 1 to N, a first selection end of a first multiplexer MUX1 in a switching unit corresponding to the pixel unit is connected to the pixel 1 of the pixel unit, a second selection end of the first multiplexer MUX1 is grounded, a common output end of the first multiplexer MUX1 is connected to a first end of a first capacitor Cs of a corresponding detection unit, and a control end of the first multiplexer MUX1 is configured to receive a first multiplexing control signal Smux1.
In one possible implementation manner, in the touch detection mode, each first multipath control signal Smux1 controls each first multiplexer MUX1 to connect to a corresponding pixel, and each first switch control signal Sq1 controls each first switch Q1 to be turned off.
The embodiment of the disclosure controls each first multiplexer MUX1 to connect to a corresponding pixel by using each first multipath control signal Smux1, controls each first switch Q1 to be turned off by using each first switch control signal Sq1, and can control the optical fingerprint chip 20 to operate in the touch detection mode, the photodiode D1 of each detection unit is bypassed, and the first end of the first capacitor Cs of each detection unit is connected to a corresponding pixel by using the first multiplexer MUX1, so that the first capacitor Cs and the second capacitor Cc can reflect the touch condition of the corresponding pixel, that is, the capacitance values of the first capacitor Cs and the second capacitor Cc corresponding to the touch condition and the non-touch condition are different, which results in a change of the voltage accessed by the integration circuit, and the voltages are integrated and output, and the touch threshold is used for determining whether the touch occurs, for example, whether the touch occurs in a preset range of the touch threshold, if so, the touch occurrence can be determined.
In a possible implementation manner, in the fingerprint acquisition mode, each first multipath control signal Smux1 controls each first multiplexer MUX1 to be connected to ground, and each first switch control signal Sq1 controls each first switch Q1 to be turned on.
In the embodiment of the disclosure, each first multiplexer MUX1 is controlled to be connected to ground by each first multipath control signal Smux1, each first switch Q1 is controlled to be turned on by each first switch control signal Sq1, and the optical fingerprint chip 20 can be controlled to operate in the fingerprint collection mode, the photodiode D1 of each detection unit is connected into a circuit, and the first end of the first capacitor Cs of each detection unit is grounded (forming a structure shown in fig. 3). For the fingerprint collection process, the embodiments of the present disclosure are not limited, and those skilled in the art can implement the fingerprint collection process by referring to the related art.
Of course, the embodiment of the present disclosure may further save power consumption in the touch detection mode, and improve the signal-to-noise ratio and the sensitivity, and the following describes possible implementation manners by way of example.
Referring to fig. 6, fig. 6 is a schematic diagram of a fingerprint detection device according to an embodiment of the present disclosure.
In one possible implementation, as shown in fig. 6, each switching unit may further include a second multiplexer MUX2 and a plurality of second switches Q2, wherein,
the first common node of each switching unit is respectively connected with each selection end of the second multiplexer MUX2, the common output end of the second multiplexer MUX2 is connected with the integrating circuit of the first detection unit, the control end of the second multiplexer MUX2 is used for receiving the second multi-path control signal Smux2, the first detection unit is any one of a plurality of detection units,
the first common nodes of the other detecting units except the first detecting unit are connected to the corresponding integrating circuits through the first end of the second switch Q2 and the second end of the second switch Q2, and the control end of the second switch Q2 is used for receiving a control signal Sq2 of the second switch Q2.
By arranging the second multiplexer MUX2 and the second switches Q2 in the switching unit, the embodiment of the disclosure can detect the voltage change of any one pixel in the pixel unit, and can bypass the detection units corresponding to other pixels, thereby further reducing power consumption.
Certainly, the embodiment of the present disclosure does not limit to obtaining only the change condition of one pixel of the pixel unit, and a person skilled in the art may set an appropriate number according to the actual situation and the need, for example, K may be arbitrarily selected from N pixels, where K is smaller than N, and correspondingly, only K multiplexers need to be correspondingly set, and the setting is performed in the manner shown in fig. 5, as long as it is ensured that each multiplexer accesses a different pixel.
In one example, in each switching unit, the sum of the numbers of the second multiplexer MUX2 and the plurality of second switches Q2 may be greater than or equal to the number of detection units of the switching unit.
In a possible implementation manner, in the touch detection mode, each first multipath control signal Smux1 controls each first multiplexer MUX1 to connect to a corresponding pixel, each first switch control signal Sq1 controls each first switch Q1 to be turned off, each second switch Q2 control signal Sq2 controls each second switch Q2 to be turned off, and the second multipath control signal Smux2 controls the second multiplexer MUX2 to select any one of the first common nodes to be connected to the integration circuit of the first detection unit.
In the embodiment of the disclosure, each first multiplexer MUX1 is controlled by each first multiplexing control signal Smux1 to connect to a corresponding pixel, each first switch Q1 is controlled to be disconnected by each first switch control signal Sq1, each second switch Q2 control signal Sq2 controls each second switch Q2 to be disconnected, the second multiplexer MUX2 is controlled by the second multiplexing control signal Smux2 to select any one of the first common nodes to be connected to the integrating circuit of the first detecting unit, the optical fingerprint chip 20 can be controlled to operate in the touch detection mode, the photodiode D1 of each detecting unit is bypassed, the first end of the first capacitor Cs of each detecting unit is connected to the corresponding pixel through the first multiplexer MUX1, so that the first capacitor Cs and the second capacitor Cc can reflect the touch condition of the corresponding pixel, that the touch condition and the non-touch condition correspond to the first capacitor Cs and the second capacitor Cs are different in capacitance value, one second capacitor Cs and the second capacitor Cc is connected to the corresponding pixel through the first multiplexer MUX2, and the two pixels are connected to the corresponding pixel, and the integrated voltage of the pixel Cs and the second capacitor Cc are connected to the detecting unit.
In a possible implementation manner, in the fingerprint collection mode, each first multipath control signal Smux1 controls each first multiplexer MUX1 to be connected to ground, each first switch control signal Sq1 controls each first switch Q1 to be turned on, each second switch Q2 control signal Sq2 controls each second switch Q2 to be turned on, and the second multipath control signal Smux2 controls the second multiplexer MUX2 to select the first common node of the first detection unit to be connected to the integration circuit of the first detection unit.
In the embodiment of the present disclosure, each first multiplexer MUX1 is controlled to be connected to ground by each first multipath control signal Smux1, each first switch Q1 is controlled to be turned on by each first switch control signal Sq1, each second switch Q2 is controlled to be turned on by each second switch Q2 control signal Sq2, and the second multiplexer MUX2 is controlled to select the first common node of the first detection unit to be connected to the integrating circuit of the first detection unit, so that the optical fingerprint chip 20 can be controlled to operate in the fingerprint collection mode, in which the photodiode D1 of each detection unit is connected to the circuit and the first end of the first capacitor Cs of each detection unit is connected to ground (forming the structure shown in fig. 3), when the light source Cc of the display panel is turned on, the photodiode D1 generates a photocurrent, so that the first capacitor Cs and the second capacitor can react to the current change, so that a subsequent component performs collection of a fingerprint image. For the fingerprint collection process, the embodiments of the present disclosure are not limited, and those skilled in the art can refer to the related art to implement the fingerprint collection process.
Referring to fig. 7, fig. 7 is a schematic diagram of a fingerprint detection device according to an embodiment of the disclosure.
In one possible implementation, as shown in fig. 7, the apparatus may further include:
the control module 30 is connected to the switching module 10 and the optical fingerprint chip 20, and is configured to:
when the optical fingerprint chip 20 works in the touch detection mode, acquiring an integral result of each integral circuit in a preset period, and judging whether touch occurs according to the integral result and a preset touch threshold;
and under the condition that the integral result reaches the preset touch threshold value, determining that touch occurs, switching the working mode of the optical fingerprint chip 20 to be the fingerprint acquisition mode, opening a light source assembly, and acquiring the fingerprint by using the optical fingerprint chip 20 after delaying the preset time.
By setting the control module 30, in the embodiment of the present disclosure, when the optical fingerprint chip 20 works in the touch detection mode, the integration result of each integration circuit is obtained in a preset period, and whether touch occurs is determined according to the integration result and a preset touch threshold; and under the condition that the integral result reaches the preset touch threshold value, determining that touch occurs, switching the working mode of the optical fingerprint chip 20 into the fingerprint acquisition mode, opening a light source component, and acquiring the fingerprint by using the optical fingerprint chip 20 after delaying the preset time, so that the fingerprint acquisition flow is saved, the response speed is improved, and the system resources are saved.
In one example, the control module 30 may further output a first multipath control signal Smux1, a second multipath control signal Smux2, a first switch control signal Sq1, and a second switch Q2 control signal Sq2 to control the operation mode of the optical fingerprint chip 20 to be the fingerprint collection mode or the touch detection mode.
For example, as shown in fig. 4, the control module 30 may control each first switch Q1 to be turned on by each first switch control signal Sq1, may control the optical fingerprint chip 20 to operate in the fingerprint collecting mode, may also control each first multiplexer MUX1 to be connected to ground by each first multi-path control signal Smux1, and controls each first switch Q1 to be turned on by each first switch control signal Sq1, so as to control the optical fingerprint chip 20 to operate in the fingerprint collecting mode;
for example, as shown in fig. 6, the control module 30 may further control each first multiplexer MUX1 to connect to a corresponding pixel through each first multi-channel control signal Smux1, control each first switch Q1 to be turned off through each first switch control signal Sq1, control each second switch Q2 control signal Sq2 to be turned off through each second switch Q2, control the second multiplexer MUX2 to select any one of the first common nodes to be connected to the integration circuit of the first detection unit through the second multi-channel control signal Smux2, so as to control the optical fingerprint chip 20 to operate in the touch detection mode; each first multiplexer MUX1 may also be controlled by each first multi-channel control signal Smux1 to be connected to the ground, each first switch Q1 is controlled by each first switch control signal Sq1 to be turned on, each second switch Q2 is controlled by each second switch Q2 control signal Sq2 to be turned on, and the second multi-channel control signal Smux2 is controlled to control the second multiplexer MUX2 to select the first common node of the first detection unit to be connected to the integrating circuit of the first detection unit, so as to control the optical fingerprint chip 20 to operate in the fingerprint collection mode.
The implementation manner of the control module 30 is not limited in the embodiment of the present disclosure, and for example, the control module 30 may be implemented by a processing component, and in an example, the processing component includes but is not limited to a single processor, or a discrete component, or a combination of a processor and a discrete component. The processor may comprise a controller in an electronic device having functionality to execute instructions, which may be implemented in any suitable manner, e.g., by one or more Application Specific Integrated Circuits (ASICs), digital Signal Processors (DSPs), digital Signal Processing Devices (DSPDs), programmable Logic Devices (PLDs), field Programmable Gate Arrays (FPGAs), controllers, micro-controllers, microprocessors, or other electronic components. Within the processor, the executable instructions may be executed by hardware circuits such as logic gates, switches, application Specific Integrated Circuits (ASICs), programmable logic controllers, and embedded microcontrollers.
The embodiment of the present disclosure does not limit the specific implementation manner of the light source assembly, for example, the light source assembly may be a backlight source (such as a liquid crystal display panel) of a display panel or a display module (such as a self-luminous display panel), the specific size of the preset duration is not limited, and those skilled in the art may set the light source assembly according to actual situations and needs.
In the embodiment of the disclosure, the optical fingerprint chip 20 is switched between the touch detection mode and the fingerprint acquisition mode through the switching module 10, when the optical fingerprint chip 20 works in the touch detection mode, the optical fingerprint chip 20 is used for detecting whether the display panel is touched, and under the condition that the touch is determined, the working mode of the optical fingerprint chip 20 is switched to the fingerprint acquisition mode, and the optical fingerprint chip can directly notify the display module or the light source module through the on-chip bus, directly start to acquire an image after a preset time is delayed, and inform the system to take away data after the image acquisition is completed, thereby completing a complete acquisition process. In the touch detection mode, the charge of the local area is collected once at a certain time, the N pixels are connected and only 1 data is collected, and then a plurality of sub-areas are collected without collecting the whole touch area, so that the power consumption is further reduced, the process complexity can be reduced, other sensors are not depended on, multiple participation of a system is not required, the system resources are saved, the response speed is greatly improved, and the power consumption is greatly optimized.
According to another aspect of the present disclosure, there is provided a fingerprint chip including the fingerprint detection device.
According to another aspect of the present disclosure, there is provided a display device including the fingerprint chip.
According to another aspect of the present disclosure, there is provided an electronic device including the display device.
According to another aspect of the present disclosure, an electronic device is provided, which includes any one of a display, a smart phone, a smart watch, a smart bracelet, a tablet computer, a notebook computer, an integrated computer, an access control device, and an electronic door lock.
For example, the electronic device in the present embodiment includes, but is not limited to, a desktop computer, a television, a mobile device with a large-sized screen, such as a mobile phone, a tablet computer, and other common electronic devices that require multiple chip-level connections to implement driving.
The electronic device may also be, for example, a User Equipment (UE), a mobile device, a User terminal, a handheld device, a computing device, or a vehicle-mounted device, and some examples of the terminal are: a display, a Smart Phone or a portable device, a Mobile Phone (Mobile Phone), a tablet computer, a notebook computer, a palmtop computer, a Mobile Internet Device (MID), a wearable device, a Virtual Reality (VR) device, an Augmented Reality (AR) device, a wireless terminal in Industrial Control (Industrial Control), a wireless terminal in unmanned driving (self), a wireless terminal in Remote Surgery (Remote Surgery), a wireless terminal in Smart Grid, a wireless terminal in Transportation Safety (Transportation Safety), a wireless terminal in Smart City (Smart City), a wireless terminal in Smart Home (Smart Home), a wireless terminal in car networking, and the like. For example, the server may be a local server or a cloud server.
The above description is intended to be illustrative of the present invention and not to limit the scope of the invention, which is defined by the claims appended hereto.
The word "exemplary" is used exclusively herein to mean "serving as an example, embodiment, or illustration. Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments.
It should be noted that, in this document, the contained terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrases "comprising a," "8230," "8230," or "comprising" does not exclude the presence of additional like elements in a process, method, article, or apparatus that comprises the element.
The flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to various embodiments of the present disclosure. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of instructions, which comprises one or more executable instructions for implementing the specified logical function(s). In some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems that perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
The foregoing description of the embodiments of the present disclosure has been presented for purposes of illustration and description, but is not intended to be exhaustive or limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen in order to best explain the principles of the embodiments, the practical application, or improvements made to the technology in the marketplace, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein.
Claims (13)
1. A fingerprint detection device, applied to a display panel, the device comprising:
a switching module connected to the optical fingerprint chip for switching the working mode of the optical fingerprint chip to a touch detection mode or a fingerprint acquisition mode,
when the optical fingerprint chip works in the touch detection mode, the optical fingerprint chip is used for detecting whether the display panel is touched or not; when the optical fingerprint chip works in the fingerprint acquisition mode, the optical fingerprint chip is used for fingerprint acquisition.
2. The apparatus of claim 1, wherein the switching module is configured to:
when the optical fingerprint chip works in the touch detection mode, whether the display panel is touched or not is judged by utilizing the optical fingerprint chip, and under the condition that the touch is determined, the working mode of the optical fingerprint chip is switched to be the fingerprint acquisition mode, so that the optical fingerprint chip acquires fingerprints.
3. The apparatus of claim 1, wherein the switching module is configured to:
when the optical fingerprint chip works in the fingerprint acquisition mode, if the display panel enters the sleep mode or the duration that the optical fingerprint chip does not detect the fingerprint reaches the preset duration, the working mode of the optical fingerprint chip is switched to the touch detection mode.
4. The apparatus of claim 1, wherein the switching module comprises a plurality of switching units, each switching unit comprising a plurality of first multiplexers, a plurality of first switches, each switching unit being connected to a corresponding detection unit of the optical fingerprint chip, respectively, wherein,
the first selection end of each first multiplexer is connected with a corresponding pixel of the display panel, the second selection end of each first multiplexer is grounded, the common output end of each first multiplexer is connected with the first end of the first capacitor of the corresponding detection unit, the control end of each first multiplexer is used for receiving a first multi-path control signal,
the control end of each first switch is used for receiving a first switch control signal, the first end of each first switch is grounded through the corresponding photodiode of the detection unit, the second end of each first switch is connected to a first common node of the second end of the first capacitor and the first end of the second capacitor of the detection unit, and the first common node is connected to the integrating circuit of the detection unit.
5. The apparatus of claim 4,
in the touch detection mode, each first multi-path control signal controls each first multi-path selector to be connected with a corresponding pixel, and each first switch control signal controls each first switch to be disconnected;
and under the fingerprint acquisition mode, each first multipath control signal controls each first multiplexer to be connected with the ground, and each first switch control signal controls each first switch to be conducted.
6. The apparatus of claim 4, wherein each switching unit further comprises a second multiplexer and a plurality of second switches, wherein,
the first common node of each switching unit is respectively connected to each selection end of the second multiplexer, the common output end of the second multiplexer is connected to the integrating circuit of the first detection unit, the control end of the second multiplexer is used for receiving a second multi-path control signal, the first detection unit is any one of the plurality of detection units,
and the first common nodes of other detection units except the first detection unit are connected to the corresponding integration circuits through the first end of the second switch and the second end of the second switch, and the control end of the second switch is used for receiving a second switch control signal.
7. The apparatus of claim 6, wherein, in the touch detection mode,
in the touch detection mode, each first multi-path control signal controls each first multi-path selector to be connected with a corresponding pixel, each first switch control signal controls each first switch to be switched off, each second switch control signal controls each second switch to be switched off, and the second multi-path control signal controls the second multi-path selector to select any one first common node to be connected with the integrating circuit of the first detection unit;
in the fingerprint collection mode, each first multipath control signal controls each first multiplexer to be connected with the ground, each first switch control signal controls each first switch to be conducted, each second switch control signal controls each second switch to be conducted, and the second multipath control signal controls the second multipath selector to select a first common node of the first detection unit to be connected with an integrating circuit of the first detection unit.
8. The apparatus according to any one of claims 4 to 7, further comprising:
a control module to:
when the optical fingerprint chip works in the touch detection mode, acquiring an integral result of each integral circuit in a preset period, and judging whether touch occurs according to the integral result and a preset touch threshold value;
and under the condition that the integral result reaches the preset touch threshold value, determining that touch occurs, switching the working mode of the optical fingerprint chip into the fingerprint acquisition mode, opening a light source assembly, and acquiring the fingerprint by using the optical fingerprint chip after delaying the preset time.
9. The apparatus of claim 1, wherein the display panel comprises at least one of a liquid crystal display panel, a micro-light emitting diode display panel, a mini-light emitting diode display panel, a quantum dot light emitting diode display panel, an organic light emitting diode display panel, a cathode ray tube display panel, a digital light processing display panel, a field emission display panel, a plasma display panel, an electrophoretic display panel, an electrowetting display panel, and a small pitch display panel.
10. A fingerprint chip, characterized in that it comprises a fingerprint detection device according to any one of claims 1 to 9.
11. A display device characterized by comprising the fingerprint chip of claim 10.
12. An electronic device comprising the display device of claim 11.
13. The electronic device of claim 12, wherein the electronic device comprises any one of a display, a smart phone, a smart watch, a smart bracelet, a tablet computer, a laptop computer, an all-in-one computer, an access control device, and an electronic door lock.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211413870.2A CN115690863A (en) | 2022-11-11 | 2022-11-11 | Fingerprint detection device, fingerprint chip, display device and electronic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211413870.2A CN115690863A (en) | 2022-11-11 | 2022-11-11 | Fingerprint detection device, fingerprint chip, display device and electronic equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115690863A true CN115690863A (en) | 2023-02-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211413870.2A Pending CN115690863A (en) | 2022-11-11 | 2022-11-11 | Fingerprint detection device, fingerprint chip, display device and electronic equipment |
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| Country | Link |
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| CN (1) | CN115690863A (en) |
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2022
- 2022-11-11 CN CN202211413870.2A patent/CN115690863A/en active Pending
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