CN108846371B - Display device and fingerprint identification method thereof - Google Patents
Display device and fingerprint identification method thereof Download PDFInfo
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- CN108846371B CN108846371B CN201810670112.6A CN201810670112A CN108846371B CN 108846371 B CN108846371 B CN 108846371B CN 201810670112 A CN201810670112 A CN 201810670112A CN 108846371 B CN108846371 B CN 108846371B
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- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
- G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
- G06V40/12—Fingerprints or palmprints
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Abstract
The invention discloses a display device and a fingerprint identification method thereof, wherein the display device comprises a display area and a non-display area; the display area comprises a plurality of light source units and a touch layer; the display area further comprises a fingerprint identification area, and the fingerprint identification area comprises a plurality of fingerprint identification units; the fingerprint identification method of the display device comprises the following steps: activating a touch layer, detecting a touch position and determining a touch area; when the touch area is positioned in the fingerprint identification area, controlling the light source unit in the touch area to light up so as to provide a light source for the fingerprint identification unit; and controlling a fingerprint identification unit in the touch area to identify the fingerprint. When the touch main body carries out fingerprint identification, only the light source units in the touch area where the touch main body is located need to be lightened, all the light source units do not need to be lightened, and the power consumption of the display device during fingerprint identification is effectively reduced.
Description
Technical Field
The invention relates to the technical field of display, in particular to a display device and a fingerprint identification method thereof.
Background
Fingerprints are unique to each individual. With the development of science and technology, a variety of display devices with fingerprint identification functions appear in the market, such as mobile phones, tablet computers, intelligent wearable devices and the like. Therefore, before the user operates the display device with the fingerprint identification function, the user only needs to touch the fingerprint identification unit of the display device with a finger to carry out authority identification, and the authority identification process is simplified.
In order to increase the screen ratio of the display device, the fingerprint recognition unit is disposed in the display area of the display device in an increasing number of configurations. The light source unit in the display area provides a light source for the fingerprint identification unit, and at present, when fingerprint identification is carried out, the light source unit needs to be completely opened, so that the power consumption is larger.
Disclosure of Invention
In view of the above, the present invention provides a display device and a fingerprint identification method thereof.
In a first aspect, an embodiment of the present invention provides a fingerprint identification method for a display device, where the display device includes a display area and a non-display area; the display area comprises a plurality of light source units and a touch layer; the display area further comprises a fingerprint identification area, and the fingerprint identification area comprises a plurality of fingerprint identification units; the fingerprint identification method of the display device comprises the following steps: activating a touch layer, detecting a touch position and determining a touch area; when the touch area is positioned in the fingerprint identification area, controlling the light source unit in the touch area to light up so as to provide a light source for the fingerprint identification unit; and controlling a fingerprint identification unit in the touch area to identify the fingerprint.
In a second aspect, an embodiment of the present invention provides a display device, including: a display area and a non-display area surrounding the display area; the display area comprises a plurality of light source units and a touch layer; the display area further comprises a fingerprint identification area, and the fingerprint identification area comprises a plurality of fingerprint identification units; the non-display area includes a processor; the processor comprises a positioning processing module, a first signal processing module and a second signal processing module; the light source unit is used for providing a light source for the fingerprint identification unit; a fingerprint recognition unit for generating a fingerprint signal according to the intensity of the received light; the touch layer is used for detecting a touch position, generating a positioning signal and transmitting the positioning signal to the positioning processing module; the positioning processing module is used for receiving the positioning signals, determining a touch area after operation and generating at least a first signal and a second signal; the first signal processing module is used for controlling the light source unit in the touch area to provide a light source for the fingerprint identification unit based on the first signal generated by the positioning processing module; and the second signal processing module is used for controlling the fingerprint identification unit in the touch area to identify the fingerprint based on the second signal generated by the positioning processing module.
Compared with the prior art, the display device and the fingerprint identification method thereof provided by the invention at least realize the following beneficial effects:
the touch position is detected through the touch layer, so that a touch area is determined, when the touch area is located in a fingerprint identification area, the light source unit in the touch area is controlled to be lightened to provide a light source for the fingerprint identification unit, the fingerprint identification unit in the touch area identifies a fingerprint, a plurality of fingerprint signals are generated by a plurality of fingerprint identification units in the touch area, and the fingerprint information is generated by processing the plurality of fingerprint signals. When the touch main body carries out fingerprint identification, only the light source units in the touch area where the touch main body is located need to be lightened, all the light source units do not need to be lightened, and the power consumption of the display device during fingerprint identification is effectively reduced.
Of course, it is not necessary for any product in which the present invention is practiced to achieve all of the above-described technical effects simultaneously.
Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.
Fig. 1 is a schematic structural diagram of a display device according to an embodiment of the present invention;
FIG. 2 is a schematic view of the display device of FIG. 1 taken along section line A-A';
FIG. 3 is a flowchart of a fingerprint recognition method for a display device according to an embodiment of the present invention;
FIG. 4 is a flowchart of a method for determining a touch area according to an embodiment of the present invention;
FIG. 5 is a schematic structural diagram of another display device according to an embodiment of the present invention;
FIG. 6 is a flowchart illustrating a method for activating a touch layer according to an embodiment of the invention;
FIG. 7 is another flowchart of a method for activating a touch layer according to an embodiment of the invention;
FIG. 8 is a schematic structural diagram of another display device according to an embodiment of the present invention;
FIG. 9 is a schematic view of the display device of FIG. 8 taken along section line B-B';
fig. 10 is a schematic structural diagram of a processor according to an embodiment of the present invention.
Detailed Description
Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.
The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
Fig. 1 is a schematic structural diagram of a display device according to an embodiment of the present invention, fig. 2 is a schematic structural diagram of the display device shown in fig. 1 along a section line a-a', fig. 3 is a flowchart of a fingerprint identification method of the display device according to an embodiment of the present invention, and referring to fig. 1-3, the present invention provides a display device including a display area AA and a non-display area NA; the display area AA includes a plurality of light source units 110 and a touch layer 120; the display area AA further includes a fingerprint identification area 20, the fingerprint identification area 20 including a plurality of fingerprint identification units 210;
the fingerprint identification method of the display device comprises the following steps:
step 101, activating a touch layer, detecting a touch position and determining a touch area;
102, when the touch area is located in the fingerprint identification area, controlling a light source unit in the touch area to light up so as to provide a light source for the fingerprint identification unit;
and 103, controlling a fingerprint identification unit in the touch area to identify the fingerprint.
Specifically, with continued reference to fig. 1-3, the display device includes a display area AA and a non-display area NA, the display area AA includes a fingerprint identification area 20, and the fingerprint identification area 20 includes a plurality of fingerprint identification units 210, so that the screen occupation ratio of the display device is improved, and the display device conforms to the development trend of the narrow edge of the display device.
The touch position is detected through the touch layer 120, so that the touch area 40 is determined, when the touch area 40 is located in the fingerprint identification area 20, the light source unit 110 in the touch area 40 is controlled to be turned on to provide a light source for the fingerprint identification unit 210, the fingerprint identification unit 210 in the touch area 40 identifies a fingerprint, the plurality of fingerprint identification units 210 in the touch area 40 generate a plurality of fingerprint signals, and the plurality of fingerprint signals are processed to generate fingerprint information. When the touch subject performs fingerprint identification, only the light source units 110 in the touch area 40 where the touch subject is located need to be turned on, and all the light source units 110 do not need to be turned on, thereby effectively reducing the power consumption of the display device during fingerprint identification.
It should be noted that, in fig. 1 and fig. 2, only the position and the structure of the touch area 40 are exemplarily marked, and the touch area 40 may also have other structures, and may also be at other positions in the fingerprint identification area 20, which is not limited in this embodiment.
In fig. 2, the touch layer 120 includes a capacitive touch electrode. It should be noted that fig. 2 only illustrates the display device as a self-capacitive touch display device, and the capacitive touch electrodes are self-capacitive electrodes 121 that are independent from each other, in other embodiments of the present invention, the display device may also be a mutual capacitive touch display device, and the capacitive touch electrodes include touch driving electrodes and touch sensing electrodes, which is not limited in this respect. Optionally, in step 101, activating the touch layer, detecting the touch position, and determining the touch area, which may be further refined as described in fig. 4, where fig. 4 is a flowchart of a method for determining the touch area according to an embodiment of the present invention, and specifically, the method includes:
step 1011, activating a touch layer, wherein the touch layer comprises a plurality of touch units;
step 1012, providing a touch signal to the touch unit;
step 1013, identifying the boundary of the finger through a touch unit so as to determine the coordinates of the boundary of the finger;
and 1014, determining a touch mode area according to the coordinates.
Specifically, with reference to fig. 4, after the position of the finger is determined by the touch unit, the relative position of the finger on the touch layer is identified, the boundary of the finger is identified by the touch unit, the coordinates of the boundary of the finger are determined, and the touch mode area is determined according to the coordinates. Wherein, the size of the touch control unit can be 4000 multiplied by 4000 μm2。
It should be noted that, in the embodiment of the present invention, only the touch original in the prior art is used to detect the touch main body, so as to determine the touch area, and no additional touch original is needed, which is different from the prior art that the touch mode is to detect the touch point through touch, and the touch mode in the embodiment of the present invention is to determine the touch area through touch. For example, all areas where the touch electrodes having the capacitance variation larger than the touch recognition threshold are located are recognized as touch areas. Because the touch electrode is partitioned, the whole electrode can still be identified as a touch area even if a finger just touches the position of the finger at the edge of the touch electrode, so that the identified touch area is not smaller than the real touch area, a redundant area is provided for fingerprint identification, and the fingerprint identification can be completed. In addition, the touch area is calculated after the touch point is additionally calculated. Calculation errors can be avoided while reducing power consumption. The touch area determined by the coordinates in this embodiment may be exactly equal to the area where the finger is located, may also be an area slightly larger than the area where the finger is located and covering the area where the finger is located, or may also be an area slightly smaller than the area where the finger is located and completely covered by the area where the finger is located, which is not limited herein.
It is understood that, in the present embodiment, only a finger is used as a touch subject for explanation, and other touch subjects may also be used in the present embodiment, which is not limited in this embodiment.
Fig. 5 is a schematic structural diagram of another display device according to an embodiment of the present invention, and fig. 6 is a flowchart of a method for activating a touch layer according to an embodiment of the present invention, referring to fig. 5 and fig. 6, optionally, wherein the non-display area NA further includes a fingerprint recognition button 311;
activating the touch layer, further:
step 201, starting a fingerprint identification button and generating starting information;
step 202, generating a touch starting signal according to the starting signal;
step 203, activating the touch layer according to the touch start signal.
Fig. 7 is another flowchart of a method for activating a touch layer according to an embodiment of the present invention, referring to fig. 7, optionally, wherein the display device further includes a sensor;
activating the touch layer, further:
Specifically, with reference to fig. 5 to 7, when the touch layer is not needed, the touch layer does not receive a signal, and when the touch layer is needed, the touch layer is activated by the fingerprint recognition button or the sensor, so as to effectively reduce power consumption of the display device. The sensor may be a gravity sensor, and the touch layer is activated by lifting a hand, but the embodiment of the present invention is described only by taking the gravity sensor as an example, the sensor is not limited to the gravity sensor, and the sensor may also be other sensors, which is not described in detail in this embodiment.
It is to be understood that, in the embodiments of the present invention, the method for activating the touch layer is only described by using the fingerprint identification button or the sensor as an example, and the method for activating the touch layer is not limited to activating the touch layer by using the fingerprint identification button or the sensor, and the touch layer may also be activated by using other methods, which are not described herein again.
With reference to fig. 2, optionally, the display area AA includes a plurality of pixel units 130, the pixel units 130 are multiplexed as the light source unit 110, the pixel units 130 provide light sources for the fingerprint identification unit 210, and light emitted by the pixel units 130 is reflected by the touch object to form reflected light, which is incident on the fingerprint identification unit 210, so as to perform fingerprint identification.
The sub-pixel unit 120 provides a light source for the fingerprint identification unit 210, and an additional light source is not required to be arranged for the fingerprint identification unit 210, thereby reducing the thickness of the display device and the process steps of the display device.
With continuing reference to fig. 3, optionally, wherein in step 102, the light source units in the touch area are controlled to be lit, further:
and writing low the data line signal of the pixel unit in the touch area, thereby controlling the pixel unit in the touch area to be in a bright state and be in the highest gray scale.
Specifically, the brightness of the corresponding pixel unit can be controlled by the signal of the data line, the signal of the data line is written high, the corresponding pixel unit is in a dark state, the signal of the data line is written low, and the corresponding pixel unit is in a bright state.
The data line signals are written low, so that the corresponding pixel units are in a bright state, and because the brightness required in the fingerprint identification process is higher, the brightness of the pixel units is adjusted to be the highest gray scale to provide a light source for the fingerprint identification unit.
Fig. 8 is a schematic structural diagram of another display device provided by an embodiment of the present invention, and fig. 9 is a schematic structural diagram of the display device in fig. 8 along a section line B-B', referring to fig. 8 and 9, optionally, wherein,
the display area AA includes a plurality of pixel units 130;
the light source unit 110 is an externally-hung light-emitting unit 140;
the hanging type light emitting unit 140 provides a light source for the fingerprint identification unit 210, and light emitted by the hanging type light emitting unit 140 is reflected by the touch body to form reflected light to be incident on the fingerprint identification unit 210 for fingerprint identification.
In particular, with continued reference to fig. 8 and 9, if the pixel unit 130 is turned on to provide the light source for the fingerprint identification unit 210, especially the OLED self-lighting mode, the lifetime of the pixel unit 130 is reduced, and the fingerprint identification area 20 in the display device is prone to yellowing due to the higher brightness required for the fingerprint identification process. The external light-emitting unit 140 is used to provide a light source for the fingerprint identification unit 210, which can effectively avoid the situation.
With continuing reference to fig. 3, optionally, wherein in step 102, the light source units in the touch area are controlled to be lit, further:
writing high a data line signal of the pixel unit in the touch area, so as to control the pixel unit in the touch area to be in a dark state;
and controlling the externally hung light-emitting unit in the touch area to be in a light-emitting state.
Because the fingerprint identification area is in the display area, the pixel unit also has a small amount of light transmission to the fingerprint identification unit because of factors such as reflection, scattering and transmission to form the background light, because the existence of background light can influence the fingerprint identification unit to the discernment of fingerprint signal, make fingerprint identification precision receive the influence.
The externally-hung light-emitting unit in the touch area is controlled to be in a light-emitting state, so that a light source is provided for the fingerprint identification unit in the touch area, a data line signal of the pixel unit in the touch area is written to be high, and the pixel unit in the touch area is controlled to be in a dark state, so that the existence of background light is effectively reduced, and the fingerprint identification precision is improved.
With continuing reference to fig. 4, optionally, in step 1012, providing a touch signal to the touch unit further includes: the frequency of the touch signal provided to the touch unit in the fingerprint identification area is less than the frequency of the touch signal provided to the touch unit during normal touch operation.
The fingerprint identification process in the display device is longer relative to the scanning frequency of the touch signal, the frequency of the touch signal provided for the touch unit in the fingerprint identification area is smaller than that of the touch signal provided for the touch unit in normal touch operation, the influence on the whole fingerprint identification process is small and can be ignored, and meanwhile, the power consumption of the display device can be reduced due to the smaller frequency of the touch signal.
With continuing reference to fig. 4, optionally, in step 1012, providing a touch signal to the touch unit further includes: and providing a touch signal only for the touch unit in the fingerprint identification area.
When the size of the fingerprint identification area is smaller than that of the display area, only the touch control unit in the fingerprint identification area is provided with the touch control signal, the touch control unit in the whole display area is not required to be provided with the touch control signal, the power consumption of the display device in the touch control process is effectively reduced, and the whole power consumption of the display device is favorably reduced.
With continuing reference to fig. 8 and 9, optionally, wherein,
the size of the fingerprint recognition area 20 is the same as the size of the display area AA.
Specifically, the fingerprint identification area 20 includes a plurality of fingerprint identification units 210, and the fingerprint identification area 20 and the display area AA coincide with each other, that is, the fingerprint identification unit 21 is located in the display area AA, and can perform fingerprint identification in the display area AA. It should be noted that, in this embodiment, only the size of the fingerprint identification area 20 is the same as the size of the display area AA for illustration, and the size of the fingerprint identification area 20 may be smaller than the size of the display area AA in other embodiments of the present invention, which is not limited in this embodiment.
Fig. 10 is a schematic structural diagram of a processor according to an embodiment of the present invention, and referring to fig. 1, fig. 2, and fig. 10, a display device according to an embodiment of the present invention includes:
a display area AA and a non-display area NA surrounding the display area AA;
the display area AA includes a plurality of light source units 110 and a touch layer 120;
the display area AA further includes a fingerprint identification area 20, the fingerprint identification area 20 including a plurality of fingerprint identification units 210;
the non-display area NA includes a processor 30;
the processor 30 comprises a positioning processing module 301, a first signal processing module 302 and a second signal processing module 303;
a light source unit 130 for providing a light source for the fingerprint recognition unit 210;
a fingerprint recognition unit 210 for generating a fingerprint signal according to the intensity of the received light;
the touch layer 120 is configured to detect a touch position, generate a positioning signal, and transmit the positioning signal to the positioning processing module 301;
the positioning processing module 301 is configured to receive a positioning signal, determine a touch area after operation, and generate at least a first signal and a second signal;
a first signal processing module 302, configured to control the light source unit 130 in the touch area to provide a light source for the fingerprint identification unit 210 based on the first signal generated by the positioning processing module 301;
and the second signal processing module 303 is configured to control the fingerprint identification unit 210 in the touch area to identify the fingerprint based on the second signal generated by the positioning processing module 301.
Specifically, with continued reference to fig. 1, 2, and 10, the touch layer 120 detects a touch position, generates a positioning signal, and transmits the positioning signal to the positioning processing module 301, the positioning processing module 301 determines a touch area, the first signal processing module 302 controls the light source unit 110 in the touch area to provide a light source for the fingerprint identification unit 210, and the second signal processing module 303 controls the fingerprint identification unit 210 in the touch area to identify a fingerprint. When fingerprint identification is performed on a touch subject, only the light source unit 110 and the fingerprint identification unit 210 in the touch area where the touch subject is located work, and power consumption of the display device during fingerprint identification is effectively reduced.
The display device of the present application is not limited to the mobile phone shown in fig. 1, and may be a computer, a television, an electronic book, or the like.
Referring to fig. 5 and 10, alternatively, wherein,
the non-display area NA further includes a fingerprint recognition button 311;
the processor 30 further includes a touch start processing module 304;
a fingerprint identification button 311, configured to generate start information and transmit the start information to the touch start processing module 304;
the touch start processing module 304 is configured to receive the start information, generate a touch start signal, and activate a touch layer (not shown in fig. 5 and 10) based on the touch start signal.
With continuing reference to fig. 2 and 10, optionally, wherein,
also includes an inductor (not shown in fig. 2 and 10);
the processor 30 further includes a touch start processing module 304;
the sensor 304 is configured to generate start information and transmit the start information to the touch start processing module 304;
the touch start processing module 304 is configured to receive the start information, generate a touch start signal, and activate the touch layer 120 based on the touch start signal.
Specifically, with continued reference to fig. 2, 5 and 10, when the touch layer 120 is not needed to be used, the touch layer 120 does not transmit a signal, and when the touch layer is needed to be used, the start information is generated by the fingerprint identification button 311 or the sensor and is transmitted to the touch start processing module 304, and the touch start processing module 304 activates the touch layer 120, so that the power consumption of the display device is effectively reduced.
It is to be understood that, in the embodiments of the present invention, the touch layer is activated by the fingerprint recognition button or the sensor, which is not limited to activating the touch layer by the fingerprint recognition button or the sensor, and the touch layer may be activated by other methods, and details are not described herein.
Referring to fig. 2 and 10, alternatively, wherein,
the display area AA includes a plurality of pixel units 130, the pixel units 130 are multiplexed as the light source unit 110, the pixel units 130 provide light sources for the fingerprint identification unit 210, and light emitted by the light source unit 110 is reflected by the touch subject to form reflected light to be incident on the fingerprint identification unit 210 for fingerprint identification;
the first signal processing module 302 is configured to write a data line signal of the pixel unit 130 in the touch area low based on the first signal generated by the positioning processing module 301, so as to control the pixel unit 130 in the touch area to be in a bright state and to be in a highest gray level.
Specifically, with continued reference to fig. 2 and 10, when the pixel unit 130 is multiplexed as the light source unit 110, the pixel unit 130 provides the light source for the fingerprint identification unit 210 to perform fingerprint identification. The data line signal of the pixel unit 130 in the touch area is written low through the first signal processing module 302, so that the pixel unit 130 in the touch area is controlled to be in a bright state, and a light source is provided for the fingerprint identification unit. In this embodiment, only the brightness of the pixel units 130 in the touch area needs to be controlled to be the highest gray level to provide a light source for the fingerprint identification unit 210 in the touch area, and in this embodiment of the present invention, it is not necessary to light all the pixel units 130 to be the highest gray level, so that the power consumption of the display device during fingerprint identification is effectively reduced, and the service life of the pixel units 130 in the display device is prolonged.
Referring to fig. 9 and 10, alternatively, wherein,
the display area AA includes a plurality of pixel units 130;
the light source unit 110 is an externally-hung light-emitting unit 140;
the external light-emitting unit 140 provides a light source for the fingerprint identification unit 210, and light emitted by the external light-emitting unit 140 is reflected by the touch body to form reflected light which is incident on the fingerprint identification unit 210 so as to perform fingerprint identification;
a positioning processing module 301, configured to determine a touch area and further generate a third signal;
the processor 30 further comprises a third signal processing module 305;
the first signal processing module 302 is configured to write a data line signal of the pixel unit 130 in the touch area high based on the first signal generated by the positioning processing module 301, so as to control the pixel unit 130 in the touch area to be in a dark state;
the third signal processing module 305 is used for controlling the plug-in light-emitting unit 140 in the touch area to be in a light-emitting state based on the third signal generated by the positioning processing module 301.
Since the fingerprint identification area 20 is in the display area AA, the pixel unit 130 may transmit a small amount of light to the fingerprint identification unit 210 due to reflection, scattering, transmission, and the like, thereby forming a background light, and the presence of the background light may affect the identification of the fingerprint signal by the fingerprint identification unit 210, so that the fingerprint identification accuracy is affected.
Specifically, with continuing reference to fig. 9 and 10, the third signal processing module 305 is configured to control the plug-in light emitting unit 140 in the touch area to be in a light emitting state, so as to provide a light source for the fingerprint identification unit 210 in the touch area, and at the same time, the first signal processing module 302 writes a data line signal of the pixel unit 130 in the touch area high, so as to control the pixel unit 130 in the touch area to be in a dark state, thereby effectively reducing the existence of background light, and improving the fingerprint identification accuracy of the fingerprint identification unit 210 in the touch area.
By the embodiment, the display device and the fingerprint identification method thereof provided by the invention at least realize the following beneficial effects:
the touch position is detected through the touch layer, so that a touch area is determined, when the touch area is located in a fingerprint identification area, the light source unit in the touch area is controlled to be lightened to provide a light source for the fingerprint identification unit, the fingerprint identification unit in the touch area identifies a fingerprint, a plurality of fingerprint signals are generated by a plurality of fingerprint identification units in the touch area, and the fingerprint information is generated by processing the plurality of fingerprint signals. When fingerprint identification is carried out on the touch main body, only the light source units in the touch area where the touch main body is located need to be lightened, all the light source units do not need to be lightened, and the power consumption of the display device during fingerprint identification is effectively reduced.
Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.
Claims (10)
1. A fingerprint identification method of a display device is characterized in that:
the display device comprises a display area and a non-display area; the display area comprises a plurality of light source units and a touch layer; the display area further comprises a fingerprint identification area, and the fingerprint identification area comprises a plurality of fingerprint identification units; the display area also comprises a plurality of pixel units, the light source unit is an externally-hung light-emitting unit which provides a light source for the fingerprint identification unit, and light rays emitted by the externally-hung light-emitting unit are reflected by the touch main body to form reflected light which is incident to the fingerprint identification unit so as to carry out fingerprint identification;
the fingerprint identification method of the display device comprises the following steps:
activating the touch layer, detecting a touch position and determining a touch area;
when the touch area is positioned in the fingerprint identification area, controlling the light source unit in the touch area to light up so as to provide a light source for the fingerprint identification unit;
controlling the fingerprint identification unit in the touch area to identify a fingerprint;
wherein the controlling the light source unit in the touch area to be turned on further comprises:
writing a high signal to a data line of the pixel unit in the touch area, thereby controlling the pixel unit in the touch area to be in a dark state;
and controlling the external hanging type light-emitting unit in the touch area to be in a light-emitting state.
2. The fingerprint recognition method of a display device according to claim 1,
the non-display area further comprises a fingerprint identification button;
activating the touch layer, further:
the fingerprint identification button is started and generates starting information;
generating a touch starting signal according to the starting signal;
and activating the touch layer according to the touch starting signal.
3. The fingerprint recognition method of a display device according to claim 1,
the display device further comprises an inductor;
activating the touch layer, further:
generating starting information through a sensor;
generating a touch starting signal according to the starting signal;
and activating the touch layer according to the touch starting signal.
4. The fingerprint recognition method of a display device according to claim 1,
activating the touch layer, detecting a touch position, and determining a touch area, further comprising:
activating the touch layer, wherein the touch layer comprises a plurality of touch units;
providing a touch signal for the touch unit;
identifying the boundary of the finger through the touch unit so as to determine the coordinate of the boundary of the finger;
and determining the touch mode area according to the coordinates.
5. The fingerprint recognition method of a display device according to claim 4,
providing a touch signal to the touch unit, further comprising: and the frequency of the touch signal provided for the touch unit in the fingerprint identification area is less than that of the touch signal provided for the touch unit in normal touch operation.
6. The fingerprint recognition method of a display device according to claim 4,
providing a touch signal to the touch unit, further comprising: and providing a touch signal only for the touch unit in the fingerprint identification area.
7. The fingerprint recognition method of a display device according to any one of claims 1 to 6,
the size of the fingerprint identification area is the same as that of the display area.
8. A display device, comprising:
a display area and a non-display area surrounding the display area;
the display area comprises a plurality of light source units, a touch layer and a plurality of pixel units;
the display area further comprises a fingerprint identification area, and the fingerprint identification area comprises a plurality of fingerprint identification units;
the non-display area comprises a processor;
the processor comprises a positioning processing module, a first signal processing module and a second signal processing module;
the light source unit is used for providing a light source for the fingerprint identification unit, the light source unit is an externally-hung light-emitting unit which provides a light source for the fingerprint identification unit, and light rays emitted by the externally-hung light-emitting unit are reflected by the touch main body to form reflected light which is incident to the fingerprint identification unit so as to carry out fingerprint identification;
the fingerprint identification unit is used for generating a fingerprint signal according to the intensity of the received light;
the touch layer is used for detecting a touch position, generating a positioning signal and transmitting the positioning signal to the positioning processing module;
the positioning processing module is used for receiving the positioning signal, determining a touch area after operation, and generating at least a first signal, a second signal and a third signal;
the first signal processing module is configured to control the light source unit in the touch area to provide a light source for the fingerprint identification unit based on the first signal generated by the positioning processing module, and write a data line signal of the pixel unit in the touch area high, so as to control the pixel unit in the touch area to be in a dark state;
the second signal processing module is used for controlling the fingerprint identification unit in the touch area to identify a fingerprint based on the second signal generated by the positioning processing module;
and the third signal processing module is used for controlling the externally-hung light-emitting unit in the touch area to be in a light-emitting state based on the third signal generated by the positioning processing module.
9. The display device according to claim 8,
the non-display area further comprises a fingerprint identification button;
the processor also comprises a touch starting processing module;
the fingerprint identification button is used for generating starting information and transmitting the starting information to the touch starting processing module;
the touch start processing module is used for receiving the start information, generating a touch start signal and activating the touch layer based on the touch start signal.
10. The display device according to claim 8,
the device also comprises an inductor;
the processor also comprises a touch starting processing module;
the sensor is used for generating starting information and transmitting the starting information to the touch starting processing module;
the touch start processing module is used for receiving the start information, generating a touch start signal and activating the touch layer based on the touch start signal.
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| CN109977932B (en) * | 2019-05-14 | 2021-04-20 | 合肥京东方光电科技有限公司 | Fingerprint identification display substrate, display panel and display device |
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| CN110276187B (en) * | 2019-06-26 | 2022-01-18 | Oppo广东移动通信有限公司 | Control method, electronic device, and non-volatile computer-readable storage medium |
| CN110516617A (en) * | 2019-08-29 | 2019-11-29 | 合肥京东方光电科技有限公司 | Show structure and display device, method for controlling fingerprint identification |
| KR20220116065A (en) | 2020-05-14 | 2022-08-19 | 에지스 테크놀러지 인코포레이티드 | Electronic device having fingerprint detection function and fingerprint detection method |
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