CN113052154A - Skin texture data acquisition device and acquisition method and display device thereof - Google Patents
Skin texture data acquisition device and acquisition method and display device thereof Download PDFInfo
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Abstract
A skin texture data acquisition device, a skin texture data acquisition method and a display device are disclosed. The skin texture data acquisition method comprises the following steps: detecting a touch area of skin texture on the touch device through a capacitive touch circuit; selecting a touch central area in the touch area through a controller according to the distribution of the semaphore of a touch signal generated by skin texture contact in the touch area, selecting a characteristic area in the touch central area, and determining the characteristic area as a skin texture scanning area; the skin texture in the skin texture scanning area is scanned by a skin texture recognition circuit and skin texture data is generated. In the acquisition method, a smaller characteristic area is selected from the touch area as a skin texture scanning area, so that the touch scanning time is shortened, and the power consumption of the device is reduced.
Description
Technical Field
The embodiment of the disclosure relates to a skin texture data acquisition device, a skin texture data acquisition method and a display device.
Background
The human skin consists of the epidermis and dermis. The papilla of the dermis bulges toward the epidermis and forms many aligned papillary lines called ridges (ridges), with troughs (furrows) between the ridges. The skin surface layer of the finger (toe) palm (foot) part forms various skin texture features due to different trend of the skin ridges and the skin furrows. The term "skin texture" is also called dermatoglyph, and refers to a texture pattern on a specific part of human skin.
The skin texture of the human body is individual-specific, and the skin texture is formed 14 weeks after the embryo is formed, is not changed for the whole life once formed, and has high stability. In some cases, such as chromosomal abnormalities, congenital diseases, etc., skin texture changes and can be used as a basis for the diagnosis of collateral symptoms or diseases.
In view of the individual specificity of skin texture and its variation as diagnostic basis, identification of skin texture can be used in personal authentication systems as well as in medical diagnostic systems.
With the rapid development of display technology, Touch Screen panels (Touch screens) have gradually spread throughout the lives of people. At present, touch screens can be classified according to the working principle: resistive, capacitive, infrared, and surface acoustic wave, electromagnetic, vibration wave, and frustrated total internal reflection optical, among others. Among these touch screens, the capacitive touch screen is sought as a new favorite in the industry by virtue of its unique touch principle, high sensitivity, long service life, high light transmittance and the like.
Disclosure of Invention
The embodiment of the disclosure provides a skin texture data acquisition device, a display device and an acquisition method thereof, which are used for reducing the skin texture recognition time and power consumption of a touch screen.
At least one embodiment of the present disclosure provides an apparatus for acquiring skin texture data, including:
a capacitive touch circuit configured to detect a touch area of skin texture on a touch device;
a controller configured to select a touch center area in the touch area according to a distribution of a signal amount of a touch signal generated by skin texture contact in the touch area, and select a feature area in the touch center area, determine the feature area as a skin texture scanning area; and
a skin texture recognition circuit configured to scan skin textures within the skin texture scan area and generate skin texture data.
At least one embodiment of the present disclosure provides a display device including the above skin texture data acquisition device.
At least one embodiment of the present disclosure provides a method for acquiring skin texture data, including:
detecting a touch area of skin texture on the touch device through a capacitive touch circuit;
selecting a touch central area in the touch area through a controller according to the distribution of the semaphore of a touch signal generated by skin texture contact in the touch area, selecting a characteristic area in the touch central area, and determining the characteristic area as a skin texture scanning area;
the skin texture in the skin texture scanning area is scanned by a skin texture recognition circuit and the skin texture data is generated.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments will be briefly described below, and it is apparent that the drawings in the following description only relate to some embodiments of the present invention and are not limiting on the present invention.
FIG. 1 is a schematic diagram of an in-cell touch screen according to one embodiment of the present disclosure;
FIG. 2 is a schematic diagram of a skin texture recognition circuit according to one embodiment of the present disclosure;
FIG. 3 is a schematic diagram of a skin texture recognition circuit according to another embodiment of the present disclosure;
FIG. 4 is a schematic diagram of a skin texture recognition circuit according to yet another embodiment of the present disclosure;
FIG. 5 is a schematic diagram of a skin texture recognition circuit according to yet another embodiment of the present disclosure;
FIG. 6 is a schematic diagram of a skin texture recognition circuit according to yet another embodiment of the present disclosure;
FIG. 7 is a schematic view of an in-cell touch screen according to yet another embodiment of the present disclosure;
FIG. 8 is a flow chart of a method of driving an in-cell touch screen according to one embodiment of the present disclosure;
FIG. 9 is a flow chart of a method of acquiring skin texture data according to one embodiment of the present disclosure;
FIG. 10 is a flow chart of a method of collecting hand palm print data according to an embodiment of the present disclosure;
FIG. 11 is a schematic view of an in-cell touch screen and a touch area of a hand according to one embodiment of the present disclosure;
FIG. 12 is a schematic view of a hand according to one embodiment of the present disclosure;
FIG. 13 is a schematic view of a semaphore distribution of a touch signal in a touch area of an in-cell touch screen and a hand according to an embodiment of the disclosure;
fig. 14 is a schematic view illustrating a semaphore distribution of a touch signal in a palm touch center according to an embodiment of the disclosure;
FIG. 15 is a schematic view of a palm print texture according to one embodiment of the present disclosure;
FIG. 16 is a schematic view of a plurality of self-capacitance touch electrodes in an in-cell touch screen according to one embodiment of the present disclosure;
fig. 17 is a schematic view of a plurality of self-capacitance touch electrodes and a plurality of photosensitive touch elements in an in-cell touch screen according to an embodiment of the disclosure.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the drawings of the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the invention without any inventive step, are within the scope of protection of the invention.
Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The use of "first," "second," and similar terms in the description and claims of the present application do not denote any order, quantity, or importance, but rather the terms are used to distinguish one element from another. Also, the use of the terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one. The word "comprise" or "comprises", and the like, means that the element or item listed before "comprises" or "comprising" covers the element or item listed after "comprising" or "comprises" and its equivalents, and does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, which may also change accordingly when the absolute position of the object being described changes.
In a security-based personal authentication system using a touch screen, a method of performing skin texture (e.g., fingerprint or palm print) recognition using a skin texture recognition device, such as a fingerprint recognition device or a palm print recognition device, is widely used. At present, a fingerprint skin texture recognition module (for example, a fingerprint recognition module) is usually arranged at a vacant position outside a display area of a touch screen, so that a fingerprint skin texture recognition function is realized, the operation can be performed only by firstly recognizing the fingerprint skin texture during use, the operation is not convenient enough, and a display device and the fingerprint skin texture recognition device need to be functionally combined during manufacture, so that the operation is complicated.
Therefore, in order to solve the above-mentioned problems, there are touch screens in which a fingerprint skin texture recognition area is provided in a display area, for example, skin texture fingerprint recognition is integrated with a touch function. However, in the conventional touch screen, fingerprint skin texture recognition is performed by processing signals on all fingerprint skin texture touch reading lines in a display area, and the amount of data to be processed is large, especially for a large-size display screen, the amount of data to be processed is very large, so that the fingerprint skin texture recognition time is long, and the power consumption is large.
At least one embodiment of the present disclosure provides an apparatus for acquiring skin texture data, including: a capacitive touch circuit configured to detect a touch area of skin texture on a touch device; a controller configured to select a touch center area in the touch area according to a distribution of a signal amount of a touch signal generated by skin texture contact in the touch area, and select a feature area in the touch center area, determine the feature area as a skin texture scanning area; and a skin texture recognition circuit configured to scan skin textures within the skin texture scan area and generate skin texture data.
In the device for acquiring skin texture data, the skin texture scanning area determined according to the touch area is located in the touch area, and the area of the skin texture scanning area is smaller than that of the touch area, so that the time for scanning or identifying the skin texture can be reduced, and the power consumption of the device can be reduced.
The skin texture data acquisition device of the present disclosure may be various, such as an external touch screen and an in-cell touch screen.
At least one embodiment of the present disclosure provides an in-cell touch screen, as shown in fig. 1, including a capacitive touch circuit 1 configured to detect a touch position of skin texture on a touch device. Further, in at least one example, a touch area of skin texture on the in-cell touch screen may also be detected. For example, the capacitive touch circuit includes a plurality of capacitive touch electrodes arranged in a matrix and a touch detection chip electrically connected to the capacitive touch electrodes and configured to determine a touch position by detecting a change in a capacitance value of the capacitive touch electrodes.
The in-cell touch screen further comprises: a skin texture recognition circuit 2 and a controller 3; wherein the content of the first and second substances,
the skin texture recognition circuit 2 includes a plurality of photosensitive touch components 21 arranged in a matrix, and each of the capacitive touch electrodes corresponds to a plurality of the photosensitive touch components. As shown in fig. 16, for example, the in-cell touch screen includes a plurality of capacitive touch electrodes 40 arranged in a matrix. As shown in fig. 17, a plurality of light-sensitive touch components 21 are disposed in the region where each capacitive touch electrode 40 is located. In this way, fast, low resolution detection may be achieved when determining the touch position using the capacitive touch electrode 40, while high resolution fine scanning may be achieved when capturing or identifying skin texture using the photosensitive touch element 21. For example, the skin texture recognition circuit 2 further includes skin texture touch Scan lines Scan connected to the rows of the photosensitive touch devices 21 in a one-to-one correspondence manner, and skin texture touch Read lines Read connected to the rows of the photosensitive touch devices 21 in a one-to-one correspondence manner. For example, as shown in FIG. 2; the skin texture recognition circuit 2 is configured to recognize skin textures in corresponding regions through the light-sensitive touch device 21 and generate recognition signals, and when the controller 3 outputs the skin texture scanning signals to the skin texture touch Scan lines Scan connected to the light-sensitive touch device 21, the light-sensitive touch device 21 outputs the recognition signals to the skin texture touch Read lines Read.
The controller 3 is respectively connected with the capacitance touch circuit 1, the skin texture touch scanning line Scan and the skin texture touch reading line Read; the controller 3 is configured to determine a skin texture scanning area according to the touch position after the capacitive touch circuit 1 determines the touch position, output a skin texture scanning signal to the skin texture touch scanning line Scan corresponding to the skin texture scanning area, and process an identification signal output by the skin texture touch reading line Read corresponding to the skin texture scanning area. Further, in at least one example, the controller 3 is configured to select the touch center area in the touch area according to a distribution of signal amounts of a touch signal generated by skin texture contact in the touch area, and select the feature area in the touch center area, determining the feature area as a skin texture scanning area. In this case, the skin texture identifying circuit 2 is configured to scan the skin texture within the skin texture scanning area and generate skin texture data. The controller 3 may use hardware, firmware, software or any combination thereof; for example, the controller 3 may be implemented by a memory, a processor, and one or more program modules stored in the memory, the program modules including instructions for implementing the functions described above.
The embedded touch screen comprises a capacitance touch circuit, a skin texture recognition circuit and a controller; the controller is configured to determine a skin texture scanning area according to the touch position after the touch position is determined by the capacitive touch capacitor, the skin texture recognition circuit is used for recognizing skin textures in the skin texture scanning area through the photosensitive touch component and generating recognition signals, and when a skin texture scanning line connected with the photosensitive touch component receives the skin texture scanning signals output by the controller, the photosensitive touch component outputs the recognition signals to a skin texture touch reading line; and the controller reads and processes the identification signal output by the skin texture touch reading line. Therefore, under the control of the controller, the skin texture touch scanning and signal processing are only carried out on the skin texture scanning area corresponding to the touch position determined by the skin texture recognition circuit, so that the time of the skin texture touch scanning can be reduced, the data processing amount can be reduced, and the skin texture recognition time and the power consumption can be further reduced.
In the in-cell touch screen according to the embodiment of the present disclosure, the capacitive touch circuits may be of a mutual capacitive type or a self capacitive type, and are not limited herein. When the capacitive touch circuit is a mutual capacitance type, the capacitive touch electrode comprises a touch driving electrode and a touch sensing electrode; when the capacitive touch circuit is a self-capacitance type, the capacitive touch electrode includes only a self-capacitance electrode. The mutual capacitance touch control circuit or the self-capacitance touch control circuit has the same structure as the mutual capacitance touch control circuit or the self-capacitance touch control circuit in the prior art, and will not be described in detail herein.
In the in-cell touch screen according to the embodiment of the disclosure, the skin texture scanning area determined according to the touch area is located in the touch area, and the area of the skin texture scanning area is smaller than that of the touch area, so that the time for scanning or identifying the skin texture can be reduced, and the power consumption of the device can be reduced.
The in-cell touch panel according to the embodiment of the present disclosure may be applied to a liquid crystal display and an organic electroluminescence display, and is not limited herein.
Further, in the in-cell touch screen according to the embodiment of the disclosure, the in-cell touch screen further includes sub-pixels arranged in a matrix, and a gate signal line between adjacent rows of sub-pixels and a data signal line between adjacent columns of sub-pixels.
The density of the touch screen is typically in the millimeter range, and thus, in one embodiment of the present disclosure, the arrangement of the capacitive touch electrodes in the capacitive touch circuit may be selected according to the required touch density. Since the sub-pixel density of the touch screen is usually in the micron level, one touch point in the capacitive touch circuit corresponds to a plurality of sub-pixels in the touch screen.
Further, since the skin texture recognition circuit is used for acquiring skin texture, and in at least one example, skin texture can be recognized, and the accuracy requirement is high, the touch density of the skin texture recognition circuit is smaller than that of the capacitive touch circuit, but is generally larger than that of the sub-pixels for display in the touch screen, so that one photosensitive touch component in the skin texture recognition circuit can correspond to a plurality of sub-pixels in the touch screen. In an embodiment of the present disclosure, each photosensitive touch device may be respectively embedded in each sub-pixel, and a periodic distribution manner, a distribution density, or a pitch of all the photosensitive touch devices may be designed according to an actual situation, which is not limited herein.
Embodiments according to the present disclosure will be described in detail below with reference to examples. It should be noted that this example is for better illustration of the disclosure and should not be construed as a limitation of the disclosure.
Optionally, in the in-cell touch screen according to the embodiment of the disclosure, as shown in fig. 3, the photosensitive touch component 21 includes a photosensitive circuit 211 and a touch reading circuit 212; wherein the content of the first and second substances,
the output end of the photosensitive circuit 211 is connected to the input end of the touch reading circuit 212, the control end of the touch reading circuit 212 is connected to the corresponding skin texture touch scanning line Scan, and the output end of the touch reading circuit 212 is connected to the corresponding skin texture touch reading line Read;
the light sensing circuit 211 is configured to generate an identification signal when receiving light and provide the generated identification signal to an input terminal of the touch reading circuit 212; the light received by the photosensitive circuit 211 is light emitted by a built-in light source of the touch screen and reflected to the photosensitive circuit 211 by skin when the skin contacts the touch screen;
the touch reading circuit 212 is configured to be in a conducting state when receiving the skin texture scanning signal on the corresponding skin texture touch scanning line Scan, and output the received identification signal to the skin texture touch reading line Read.
In an in-cell touch screen according to one embodiment of the present disclosure, as shown in fig. 4, the light sensing circuit 211 includes: a light sensing transistor T1; wherein the content of the first and second substances,
the source and gate of the light sensing transistor T1 are connected to a reference signal terminal Vref, and the drain is the output terminal of the light sensing circuit 211.
The working principle of the photosensitive transistor is as follows: when no touch is generated, the built-in light source of the touch screen directly emits light, the light-sensitive transistor cannot receive reflected light, no identification signal is output, when skin touches the touch screen, the light emitted by the built-in light source of the touch screen is reflected to the light-sensitive transistor by the skin, the light intensity sensed by the light-sensitive transistor is increased, the carrier concentration in the active layer of the light-sensitive transistor is increased, an identification signal is generated, and the light-sensitive transistor outputs the identification signal to the touch reading circuit. And the identification signal that the sensitization transistor output is relevant with the light intensity of the light that the sensitization transistor received, and the stronger the light intensity, the more the identification signal that sensitization transistor output to touch-control reading circuit just is big. Because the skin has uneven skin texture, the light intensity of the areas corresponding to the pits and the bumps of the skin texture is different, and therefore whether the pits or the bumps of the skin texture are at the corresponding positions can be judged by judging the size of the identification signal.
In one embodiment of the disclosure, part of the components of the photosensitive transistor serving as the photosensitive circuit can be prepared in the same layer as part of the components of the switching transistor in the sub-pixel of the touch screen, so that the part of the components of each corresponding film layer can be changed without adding too many new preparation processes, the production cost is saved, and the production efficiency is improved. Of course, the photosensitive circuit may have other structures, which are not described in detail herein.
Further, in the in-cell touch screen according to an embodiment of the present disclosure, the reference signal terminal may be connected to a common electrode, which is not limited herein.
In the in-cell touch screen according to the embodiment of the present disclosure, the touch reading circuit 212 includes: a switching transistor T2, as shown in fig. 4; wherein the content of the first and second substances,
the source of the switch transistor T2 is the input terminal of the touch sensing circuit 212, the gate is the control terminal of the touch sensing circuit 212, and the drain is the output terminal of the touch sensing circuit 212.
In an embodiment of the disclosure, when the switch transistor T2 is in a conducting state under the control of the corresponding skin texture touch Scan line Scan, the identification signal output by the light sensing circuit 211 is output to the skin texture touch Read line Read, and the controller can realize the function of skin texture identification by processing the identification signal on the skin texture touch Read line.
In an embodiment of the disclosure, each component of the switch transistor serving as the touch reading circuit can be prepared in the same layer as each component of the switch transistor in the sub-pixel of the touch screen, so that the embedded touch screen can be realized only by changing the composition of each corresponding film layer without adding a new preparation process, the production cost is saved, and the production efficiency is improved. Of course, the touch reading circuit may have other structures, which are not described in detail herein.
In the in-cell touch screen according to the embodiment of the present disclosure, the photosensitive touch component 21 further includes a capacitor Cp, as shown in fig. 5; wherein the content of the first and second substances,
one end of the capacitor Cp is connected to the output end of the light sensing circuit 211 and the input end of the touch reading circuit 212, respectively, and the other end of the capacitor Cp is connected to the reference signal terminal Vref. The capacitor Cp is configured to enable the identification signal generated by the light sensing circuit 211 to be maintained at the input terminal of the touch reading circuit 212 for a long time, so as to ensure that the received identification signal can be output to the skin texture touch reading line Read when the touch reading circuit 212 has the skin texture scanning signal on the corresponding skin texture touch scanning line Scan.
In one embodiment of the present disclosure, skin texture touch read lines may be disposed between adjacent columns of subpixels in the touch screen. Furthermore, each skin texture touch reading line and a data signal line in the touch screen can be arranged on the same layer and are insulated from each other, namely, the skin texture touch reading line insulated from each other is prepared while each data signal line is prepared, so that an extra preparation process is not needed when the touch screen is prepared, the graphs of the data signal line and the skin texture touch reading line can be formed only through a composition process, and the preparation cost can be saved. Of course, the skin texture touch reading line and the data signal line may be prepared separately, which is not limited herein.
Similarly, in an embodiment according to the present disclosure, the skin texture touch scan lines may be disposed between adjacent rows of sub-pixels in the touch screen, and each skin texture touch scan line may also be disposed on the same layer as and insulated from a gate signal line in the touch screen, that is, the skin texture touch scan lines insulated from the gate signal lines are prepared while preparing each gate signal line, so that an additional preparation process is not required to be added during the preparation of the touch screen, and the patterns of the gate signal lines and the skin texture touch scan lines may be formed only by one-step composition process, which can save the preparation cost and increase the added value of the product. Of course, the skin texture touch scan line and the gate signal line may be prepared separately, which is not limited herein.
In the in-cell touch screen according to an embodiment of the present disclosure, as shown in fig. 6, at least one Gate signal line Gate of the touch screen may be used as a skin texture touch scan line, so as to avoid setting a new wiring in the touch screen, which may ensure that the touch screen has a large aperture ratio, and the Gate signal line is used as the Gate as the skin texture touch scan line, which may also avoid adding a driver IC for separately controlling the skin texture touch scan line, which may save the manufacturing cost.
In an in-cell touch screen according to one embodiment of the present disclosure, a controller may include:
the area determining circuit is configured to determine a skin texture scanning area according to the touch position after the capacitive touch circuit determines the touch position; further, in at least one example, the area determination circuit is configured to select the touch center area in the touch area according to a distribution of a signal amount of a touch signal generated by skin texture contact in the touch area, and select the feature area in the touch center area, determining the feature area as a skin texture scanning area.
A signal output circuit configured to output a skin texture scan signal to a skin texture touch scan line in the skin texture scan area, an
And the signal processing circuit is configured to process the identification signal output by the skin texture touch reading line in the skin texture scanning area.
In the embedded touch screen according to the embodiment of the disclosure, the signal processing circuit is configured to compare, for each skin texture touch reading line in the determined skin texture scanning area, an identification signal output by the skin texture touch reading line with an identification signal output by a previous skin texture touch reading line adjacent to the skin texture touch reading line, and amplify a signal difference; or comparing the identification signal output by the skin texture touch reading line with the identification signal output by the next skin texture touch reading line adjacent to the skin texture touch reading line, and amplifying the signal difference. So that the relative positions of the pits and the bumps on the skin texture can be defined.
In one embodiment according to the present disclosure, the signal processing circuit includes at least one differential amplifier.
In the in-cell touch screen provided by the embodiment of the disclosure, at least two adjacent skin texture touch reading lines may be a group, and the skin texture touch reading lines belonging to the same group are respectively connected to the same differential amplifier through the control switches. And selecting the identification signal on the skin texture touch reading line to be compared by using the control switch.
For example, taking fig. 6 as an example, all the skin texture touch reading lines Read are taken as a group, and the skin texture touch reading lines Read belonging to the same group are respectively connected to the same differential amplifier 32 through the control switch 31.
Further, in the in-cell touch screen according to an embodiment of the present disclosure, the signal processing circuit is generally further configured to generate a skin texture feature map according to the identification signal on the skin texture touch reading line, and compare the generated skin texture feature map with a pre-stored preset skin texture feature map to implement a skin texture identification function.
Further, in one embodiment according to the present disclosure, the in-cell touch screen includes a backlight module including, for example, a light guide plate, a point light source (e.g., LED), or a linear light source (CCFL), thereby providing a light source for a normal operation of the touch screen. As shown in fig. 7, the backlight module 200 may be disposed on a side opposite to the working surface of the in-cell touch screen 100, and may be a side illumination type or a direct type.
At least one embodiment of the present disclosure provides a display device including an acquisition device of skin texture data according to any one of the above-described embodiments of the present disclosure. The display device may be: any product or component with a display function, such as a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigator and the like. The implementation of the display device can be referred to the embodiment of the embedded touch screen, and repeated details are not repeated. It should be noted that the in-cell touch screen according to the embodiment of the present invention can also be used independently without having an image display function.
At least one embodiment of the present disclosure provides a security system comprising any of the in-line touch screens or display devices described above, which may be used for doors, safes, etc. of a closet or office.
At least one embodiment of the present disclosure provides a method for driving any one of the in-cell touch screens described above, as shown in fig. 8, including:
detecting a touch position, wherein a capacitive touch circuit detects the touch position, and a skin texture recognition circuit recognizes skin textures in a corresponding area through a photosensitive touch component and generates a recognition signal;
determining a skin texture scanning area according to the touch position, wherein after the capacitive touch circuit determines the touch position, the controller determines the skin texture scanning area according to the touch position and outputs a skin texture scanning signal to a skin texture touch scanning line corresponding to the skin texture scanning area;
identifying the skin texture in the skin texture scanning area and generating an identification signal, wherein the photosensitive touch control assembly identifies the skin texture in the skin texture scanning area to generate the identification signal and outputs the identification signal to a skin texture touch control reading line; and
and processing the identification signal, wherein the controller processes the identification signal output by the skin texture touch reading line corresponding to the skin texture scanning area.
At least one embodiment of the present disclosure also provides a method for acquiring skin texture data, as shown in fig. 9, the method including:
step S101: detecting a touch area of skin texture on the touch device through a capacitive touch circuit;
step S102: selecting the touch central area in the touch area through a controller according to the distribution of the semaphore of a touch signal generated by skin texture contact in the touch area, selecting the characteristic area in the touch central area, and determining the characteristic area as a skin texture scanning area; and
step S103: the skin texture in the skin texture scanning area is scanned by a skin texture recognition circuit and skin texture data is generated.
In the method for acquiring skin texture data according to the embodiment of the disclosure, since the skin texture scanning area is the feature area, and the feature area is located in the touch area, compared with scanning the whole touch area, the area of the scanned feature area is smaller and the speed is faster, so that not only is the time for scanning or identifying the skin texture reduced, but also the power consumption of the device is reduced, and the identification efficiency is improved.
The method for acquiring the skin texture data will be described below by taking the acquisition of the palm print data of a human hand as an example. It is understood that the method for collecting palm print data of a hand is merely exemplary, and the method for collecting skin texture data provided by the present disclosure may also be applied to other parts of a human body extremity, such as a sole, an elbow, a wrist, an arm, a leg, etc., which are not listed here.
Fig. 10 is a flowchart of a method for acquiring palm print data according to an embodiment of the disclosure. Referring to fig. 10, a method for acquiring palm print data according to an embodiment of the present disclosure includes:
step S201: and detecting a touch area of the hand skin texture on the touch screen through a capacitive touch circuit.
In at least some embodiments, the touch screen employs the skin texture data acquisition apparatus described in the previous embodiments (e.g., an in-cell touch screen). In the in-cell touch screen provided by the present disclosure, the capacitive touch circuit may be of a mutual capacitive type, or may be of a self-capacitive type. When the capacitive touch circuit is a mutual capacitance type, the capacitive touch electrode comprises a touch driving electrode and a touch sensing electrode; when the capacitive touch circuit is a self-capacitance type, the capacitive touch electrode includes only a self-capacitance electrode. The embodiment of the present disclosure specifically describes a method for acquiring palm print texture of a hand by taking an embedded touch screen using a self-capacitance touch electrode as an example.
FIG. 11 is a schematic view of an in-cell touch screen and a touch area of a hand according to an embodiment of the disclosure. FIG. 12 is a schematic view of a hand according to one embodiment of the present disclosure. Fig. 13 is a schematic view of a semaphore distribution of a touch signal in a touch area of an in-cell touch screen and a hand according to an embodiment of the disclosure. As shown in fig. 11, the touch screen 4 includes a plurality of self-capacitance touch electrodes 40 arranged in a matrix. As shown in fig. 12 and 13, when the hand 5 touches the touch screen 4, the self- capacitance touch electrodes 42 and 43 in the touch area 6 between the hand 5 and the touch screen 4 both generate touch signals, and in the non-touch area 7 (i.e. the area of the touch screen 4 except the touch area 6 in fig. 13) where the hand 5 does not touch the touch screen 4, the self-capacitance touch electrode 41 does not generate touch signals. In this way, the touch area 6 of the hand 5 on the touch screen can be detected from the area of the self-capacitance touch electrode on the touch screen 4 where the touch signal is generated.
Step S202: and according to the distribution of the signal quantity of a touch signal generated by hand palm print contact in the touch area, selecting the touch central area in the touch area through a controller, selecting a characteristic area in the touch central area, and determining the characteristic area as a skin texture scanning area.
When a hand touches a touch panel, the touch signal generated in the touch area varies in signal amount due to different contact degrees of different parts of the hand (e.g., fingers, palm center, and palm edge) on the touch panel, for example, due to different pressing force degrees, different distances between the surface of the hand and the touch panel, and the like. In the embodiment of the disclosure, according to the distribution of the semaphore, a touch center area can be selected from the touch area, and then a characteristic area is selected from the touch center area.
In at least some embodiments, the skin texture contact generates a first signal quantity of a first touch signal in the touch center region, the skin texture contact generates a second signal quantity of the first touch signal in the touch edge region, and the first signal quantity is not equal to the second signal quantity. Thus, the touch center area is determined in the touch area according to the distribution of the first signal quantity and the second signal quantity of the first touch signal. The touch control central area is selected from the touch control area, so that the skin texture scanning area is favorably reduced, the time for scanning or identifying the skin texture is reduced, and the power consumption of the device is reduced.
Similarly, the skin texture contact generates a third semaphore for a second touch signal in the feature region, the skin texture contact generates a fourth semaphore for the second touch signal in the non-feature region, and the third semaphore is not equal to the fourth semaphore. Thus, according to the distribution of the third signal quantity and the fourth signal quantity of the second touch signal, a characteristic area is determined in the touch film central area. By selecting the characteristic area in the touch control center area, the skin texture scanning area is further reduced, and the touch control scanning time is shortened.
In the embodiments of the present disclosure, the specific area (for example, the touch center area and/or the characteristic area) may be selected according to a semaphore distribution of an electrical touch signal generated by scanning an electrical touch (for example, a capacitive touch electrode), or the specific area (for example, the touch center area and/or the characteristic area) may be selected according to a semaphore distribution of an optical touch signal generated by scanning an optical touch (for example, the photosensitive touch device). According to actual needs, the same touch scanning mode may be used when selecting the touch central area and the characteristic area, or different touch scanning modes may be used.
In at least some embodiments, the first touch signal and the second touch signal are the same type of touch signal. Namely, the touch central area and the characteristic area are selected by using the same touch scanning mode, so that the switching operation of the touch scanning mode can be reduced, the power consumption of the device is reduced, and the touch scanning time is shortened. In this case, a difference between the first and second signal quantities is larger than a difference between the third and fourth signal quantities. This is because, when the filtering is performed based on the semaphore distribution of the same type of touch signal in the touch area, if the difference between the first semaphore and the second semaphore is less than or equal to the difference between the third semaphore and the fourth semaphore, the difficulty of signal filtering may be increased, thereby generating a large error, and the feature area or the touch center area may not be accurately sensed.
For example, when the first touch signal and the second touch signal are electrical touch signals, the step 202 includes: and scanning the skin texture contacted with the touch area by adopting an electric touch scanning mode to generate the electric touch signal, and selecting the touch central area and the characteristic area according to the distribution of the signal quantity of the electric touch signal in the touch area. For example, the electrical touch signal is any one of capacitance, current, or voltage. Further, a first signal quantity of the electrical touch signal in the touch central area is smaller than a second signal quantity of the electrical touch signal in the touch edge area, and a third signal quantity of the electrical touch signal in the characteristic area is smaller than a fourth signal quantity of the electrical touch signal in the non-characteristic area.
For example, as shown in fig. 12 and 13, when the hand 5 touches the touch panel 4, the touch signals generated at different portions are different. For example, the degree of contact of the finger 51, the palm center portion 52, and the palm edge portion 53 on the touch panel 4 is different, and thus the signal amount of the touch signal generated in the touch area 6 is also different. In the area corresponding to the palm center portion 52, since the palm center portion 52 is recessed with respect to the palm edge portion 53 and thus cannot be in close contact with the touch panel 4, the first signal amount of the electric touch signal generated by the self-capacitance touch electrode 43 in this area is small. In contrast, in the touch area corresponding to the palm edge portion 53 and the finger 51, the contact with the touch screen 4 is tight, and the second signal amount of the electric touch signal generated by the self-capacitance touch electrode 42 in this area is large.
In the embodiment of the present disclosure, the area with a smaller signal amount is determined as the touch center area 61, and the area with a larger signal amount is determined as the touch edge area 62. In a specific implementation, the selection of the touch center area 61 may be implemented by setting a preset threshold of the semaphore. For example, the self-capacitance touch electrode 43 in the touch center area 61 generates a first signal amount, and the self-capacitance touch electrode 42 in the touch edge area 62 generates a second signal amount, for example, the ratio of the second signal amount to the first signal amount ranges between 2 and 4. For example, the signal amount of the self-capacitance touch electrode 43 in the touch center area 61 ranges from 10000 to 15000 (the numbers used herein are only used to designate relative size, not absolute value), the signal amount of the self-capacitance touch electrode 42 in the touch edge area 62 ranges from 30000 to 40000, a predetermined threshold value of the signal amount is set to 20000, the self-capacitance touch electrode 43 whose signal amount is smaller than the predetermined threshold value is screened out and an image is generated, thereby determining the touch center area 61. Therefore, the touch central area can be selected in the touch area according to the distribution of the signal quantity of the electric touch signal generated by the hand palm print contact in the touch area.
Fig. 14 is a schematic view illustrating a semaphore distribution of a touch signal in a palm touch center according to an embodiment of the disclosure. As shown in fig. 14, the selected touch center area 61 corresponds to the plurality of self-capacitance touch electrodes 43 arranged in 4 × 6. Human palm print has abundant texture including main lines, wrinkles, nipple wrinkles, thin nodes, triangular dots and the like. Fig. 15 is a schematic diagram of palm print texture according to one embodiment of the present disclosure. As shown in fig. 15, the main lines 501 are the thickest lines on the palm, and most palms have three main lines, which are called life line, emotion line and wisdom line. The wrinkles 502 are thinner and shallower than the main line 501, and are highly irregular. The palm also has papillae 503 similar to the fingerprint, located near the base of each finger. The triangular point is the center point of the triangular regions formed by the mastoid 503 on the palm, which are located below the bases of the fingers. In addition, the palm print includes a plurality of minutiae points 504. The dominant lines and creases are important features of the palm print and can be extracted from low-resolution, lower-quality images; triangular points and minutiae points can be extracted in high-resolution, high-quality images.
In the embodiment of the present disclosure, a feature area with three main lines is taken as an example for explanation, however, an area with wrinkles or other personalized features such as scars may also be selected as the feature area, and the process of selecting the feature area is the same as that described below. The signal amount of the plurality of self-capacitance touch electrodes 43 of 4 × 6 is actually different due to the concave dots existing in the main line of the palm. For example, in the area corresponding to the main line, since the texture on the main line has a concave point, the texture at the concave point is not in close contact with the touch screen 4, and the third signal amount of the electrical touch signal generated by the self-capacitance touch electrode 431 in the area is smaller. In contrast, in the area outside the corresponding main line, where the palm 5 is in close contact with the touch screen 4, the fourth signal amount of the electrical touch signal generated by the self-capacitance touch electrode 432 in this area is larger. For the purpose of screening, the region with a smaller signal amount is determined as a characteristic region 610, and the region with a larger signal amount is determined as a non-characteristic region 612. For example, the self-capacitance touch electrode 431 in the characteristic region 610 generates a third signal quantity, and the self-capacitance touch electrode 432 in the non-characteristic region 612 generates a fourth signal quantity, for example, the ratio of the fourth signal quantity to the third signal quantity ranges from 1.09 to 1.33.
In a specific implementation, the characteristic region 610 may be selected by setting a preset threshold of the semaphore. For example, the third amount of signal generated by the self-capacitance touch electrode 431 in the characteristic region 610 ranges from 30000 to 32000, the fourth amount of signal generated by the self-capacitance touch electrode 432 in the non-characteristic region 612 ranges from 35000 to 40000, and a predetermined threshold value of the amount of signal is set to 34000, so that the self-capacitance touch electrode 431 having an amount of signal smaller than the predetermined threshold value can be screened out and an image can be generated, thereby determining the characteristic region 610.
In the above embodiment, the selection of the feature area 610 is beneficial to reduce the skin texture scanning area, shorten the palm print recognition time, and increase the palm print recognition speed. In addition, the capacitive touch electrode of the present embodiment can not only identify the touch area 6, but also identify the characteristic area 610 of the palm 5, thereby reducing the switching time of the scanning mode and shortening the touch scanning time.
For another example, when the first touch signal and the second touch signal are optical touch signals, the step 202 includes: and scanning skin textures in the touch area by adopting an optical touch scanning mode to generate the optical touch signal, and selecting the touch central area and the characteristic area according to the semaphore distribution of the optical touch signal in the touch area. For example, the optical touch signal includes light intensity. Further, in at least one example, a first signal amount of the optical touch signal in the touch center region is greater than a second signal amount of the optical touch signal in the touch edge region, and a third signal amount of the optical touch signal in the feature region is greater than a fourth signal amount of the optical touch signal in the non-feature region.
For example, after determining the touch area, the photosensitive touch device 21 of the in-cell touch screen shown in fig. 2 to 6 is used to scan the skin texture in the touch area to generate the optical touch signal. For the specific structure, arrangement mode and operation principle of the photosensitive touch component 21, reference may be made to the description in the foregoing embodiments, and details are not repeated here. In the embodiment of the present disclosure, the light for detecting touch is emitted from the back surface to the front surface of the touch screen 4, when the hand touches the front surface of the touch screen 4, the palm print of the hand reflects a part of the light back to the photosensitive touch device, and the photosensitive touch device receives the light and generates an optical touch signal.
Furthermore, in the area where the palm is in close contact with the touch screen, the detection light is partially absorbed by the palm, and a part of the detection light which is not absorbed is reflected to the photosensitive touch component, so that the signal quantity of the optical touch signal generated by the corresponding photosensitive touch component is smaller; in the area where the palm is not in close contact with the touch screen, the amount of the optical touch signal generated by the corresponding photosensitive touch component is larger. Because there is an air gap between the skin texture of the palm and the touch screen in the area of non-close contact, the light is not completely absorbed by the palm but reflected back into the photosensitive touch component, so the amount of optical signals generated in the area of non-close contact is large.
Referring to fig. 13 and 14, in the embodiment of the present disclosure, when a touch center area is selected by using the distribution of the optical touch signal, an area with a larger signal amount of the optical touch signal is determined as the touch center area 61, and an area with a smaller signal amount of the optical touch signal is determined as the touch edge area 62. Because the main line of the palm has the concave point, the main line cannot be in close contact with the touch screen 4, most of light corresponding to the lower part of the concave point is reflected to the photosensitive touch control assembly, the signal quantity of the optical touch control signal generated by the corresponding photosensitive touch control assembly is larger, and the signal quantity of the optical touch control signal generated by other areas is relatively smaller. Therefore, in this embodiment, an area where the signal amount of the optical touch signal is large is determined as the characteristic area 610, and an area where the signal amount of the optical touch signal is small is determined as the non-characteristic area 612.
In at least some embodiments, the first touch signal and the second touch signal are different touch signals. Namely, different touch scanning modes are selected to select the touch central area and the characteristic area, so that the advantages of each touch scanning mode can be utilized to improve the touch scanning precision.
For example, when the first touch signal is an electrical touch signal and the second touch signal is an optical touch signal, the step 202 includes: scanning the skin texture contacted with the touch area by adopting an electric touch scanning mode to generate an electric touch signal, and selecting the touch central area in the touch area according to the semaphore distribution of the electric touch signal in the touch area; and scanning the skin texture contacted with the touch central area by adopting an optical touch scanning mode to generate an optical touch signal, and selecting the characteristic area in the touch central area according to the signal quantity distribution of the optical touch signal in the touch central area. For example, the process of selecting the touch center area according to the semaphore distribution of the electrical touch signal in the previous embodiment and the process of selecting the feature area according to the semaphore distribution of the optical touch signal in the previous embodiment may be referred to, and are not described herein again.
For another example, when the first touch signal is an optical touch signal and the second touch signal is an electrical touch signal, the step 202 includes: scanning the skin texture contacted with the touch area by adopting an optical touch scanning mode to generate the optical touch signal, and selecting a touch central area in the touch area according to the semaphore distribution of the optical touch signal in the touch area; and scanning the skin texture contacted with the touch control central area in an electric touch control scanning mode to generate the electric touch control signal, and selecting a characteristic area in the touch control central area according to the signal quantity distribution of the electric touch control signal in the touch control central area. For example, the process of selecting the touch center area according to the semaphore distribution of the optical touch signal in the previous embodiment and the process of selecting the feature area according to the semaphore distribution of the electrical touch signal in the previous embodiment may be referred to, and details are not repeated here.
Step S203: and scanning the hand palm print in the skin texture scanning area through a skin texture scanning circuit and generating hand palm print data.
For example, as shown in fig. 14, a photosensitive touch component of the in-cell touch screen is used to scan a palm print of a hand in the feature area 610, so as to obtain palm print data including dominant line detail information in the area.
In the method for acquiring palm print data according to the embodiment of the disclosure, the selected feature area is the skin texture scanning area, and the feature area is located in the touch area, so that compared with scanning the whole touch area, the area of the scanning feature area is smaller and the speed is higher, thereby not only reducing the time for scanning or identifying the palm print, but also reducing the power consumption of the device, and being beneficial to improving the identification efficiency.
Optionally, after step S102 and before step S103, the acquisition method of the embodiment of the present disclosure further includes:
scanning the skin texture contacted with the touch central area again by adopting a touch scanning mode different from that used when the characteristic area is selected; and
and confirming that the selected characteristic area is the skin texture scanning area according to the signal quantity distribution of the touch signal obtained again.
Thus, the accuracy and safety of skin texture recognition can be further improved by the secondary confirmation step.
For example, after scanning a palm print of a hand contacting the touch center area by using one of an optical touch scanning mode and an electrical touch scanning mode and selecting the feature area, the acquisition method further includes: scanning the skin texture contacted with the touch central area by adopting the other one of an optical touch scanning mode and an electrical touch scanning mode; and confirming the selected characteristic area as the skin texture scanning area again according to the obtained semaphore distribution of the touch signal.
In at least some embodiments, skin texture data is collected using any of the in-cell touch screens described above. For example, the method for acquiring skin texture data of the embodiment of the present disclosure includes:
detecting a touch area of skin texture on the embedded touch screen by using a capacitive touch circuit;
scanning skin textures in a touch area by using a capacitance touch control circuit or a photosensitive touch control assembly, selecting a touch control central area in the touch area by using a controller according to the distribution of the signal quantity of a touch control signal generated by the contact of the skin textures in the touch area, selecting a characteristic area in the touch control central area, determining the characteristic area as a skin texture scanning area, and outputting a skin texture scanning signal to a skin texture touch control scanning line corresponding to the skin texture scanning area;
identifying skin textures in a skin texture scanning area by using a photosensitive touch component to generate an identification signal, and outputting the identification signal to a skin texture touch reading line; and
and processing the identification signal output by the skin texture touch reading line corresponding to the skin texture scanning area by using the controller.
The embodiment of the disclosure provides a skin texture data acquisition device, a skin texture data acquisition method and a display device. The capacitance touch control circuit is used for judging a touch control position, the skin texture identification circuit is used for identifying skin textures in a corresponding area through the photosensitive touch control assembly and generating an identification signal, and when a skin texture scanning line connected with the photosensitive touch control assembly has a skin texture scanning signal, the photosensitive touch control assembly outputs the identification signal to a skin texture touch control reading line; the controller is used for determining a skin texture scanning area according to the touch position after the capacitive touch circuit determines the touch position, outputting a skin texture scanning signal to a skin texture touch scanning line corresponding to the skin texture scanning area, and processing an identification signal output by a skin texture touch reading line corresponding to the skin texture scanning area. Therefore, under the control of the controller, the skin texture touch scanning and signal processing are only carried out on the determined skin texture scanning area by the skin texture recognition circuit, so that the time of the skin texture touch scanning can be shortened, the data processing amount can be reduced, and the time and the power consumption of the skin texture recognition can be further reduced.
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.
Claims (19)
1. An apparatus for acquiring skin texture data, comprising:
a capacitive touch circuit configured to detect a touch area of skin texture on a touch device;
a controller configured to select a touch center area in the touch area according to a distribution of a signal amount of a touch signal generated by skin texture contact in the touch area, and select a feature area in the touch center area, determine the feature area as a skin texture scanning area; and
a skin texture recognition circuit configured to scan skin textures within the skin texture scan area and generate skin texture data.
2. The acquisition device of claim 1, wherein the capacitive touch circuit comprises:
a plurality of capacitive touch electrodes arranged in a matrix;
a touch detection chip electrically connected with the capacitive touch electrode and configured to determine the touch area by detecting a change in capacitance value of the capacitive touch electrode;
the controller is further configured to send a skin texture scan signal to the skin texture identification circuit;
the skin texture recognition circuit is further configured to respond to the skin texture scanning signal, scan the skin texture in the skin texture scanning area to generate a recognition signal, and send the recognition signal to the controller;
the controller is further configured to process the identification signal.
3. The acquisition device according to claim 2, wherein the skin texture recognition circuit comprises a plurality of photosensitive touch components, skin texture touch scan lines, and skin texture touch read lines: the photosensitive touch control assemblies are arranged in a matrix, each capacitance touch control electrode corresponds to the photosensitive touch control assemblies, the skin texture touch control scanning lines are connected with the photosensitive touch control assemblies in rows in a one-to-one correspondence mode, and the skin texture touch control reading lines are connected with the photosensitive touch control assemblies in rows in a one-to-one correspondence mode.
4. The acquisition device according to claim 3, wherein the controller is connected to the capacitive touch circuit, the skin texture touch scan line, and the skin texture touch read line, respectively;
the controller is configured to output a skin texture scanning signal to a skin texture touch scanning line corresponding to the skin texture scanning area, output the identification signal to the skin texture touch reading line when the photosensitive touch component receives the skin texture scanning signal through the skin texture touch scanning line, and read the identification signal through the skin texture touch reading line.
5. The acquisition device according to claim 3, wherein each of the photosensitive touch components comprises a photosensitive circuit and a touch reading circuit; wherein the content of the first and second substances,
the photosensitive circuit is configured to generate an identification signal when light is received and provide the identification signal to the touch reading circuit, wherein the light is reflected to the photosensitive circuit by light emitted by the light source when the hand contacts the touch screen; and
the touch reading circuit is configured to be connected with a corresponding skin texture touch scanning line, and output the identification signal to the corresponding skin texture touch reading line when a skin texture scanning signal is present on the corresponding skin texture touch scanning line.
6. The acquisition device according to claim 5, wherein the photosensitive touch component further comprises a capacitor, one end of the capacitor is connected to the junction of the photosensitive circuit and the touch reading circuit, and the other end of the capacitor is connected to the reference signal end.
7. The acquisition device of claim 5, wherein at least one gate signal line of the touch screen is configured as the skin texture touch scan line.
8. The acquisition apparatus as set forth in claim 5, wherein the controller comprises:
the area determination circuit selects the touch central area in the touch area according to the distribution of the signal quantity of a touch signal generated by skin texture contact in the touch area, selects the characteristic area in the touch central area and determines the characteristic area as a skin texture scanning area;
a signal output circuit configured to output a skin texture scan signal to a skin texture touch scan line corresponding to the skin texture scan area; and
and the signal processing circuit is configured to process the identification signal output by the skin texture touch reading line corresponding to the skin texture scanning area.
9. The acquisition apparatus according to claim 8, wherein the signal processing circuit is configured to compare, for each skin texture touch read line corresponding to the skin texture scanning area, an identification signal output by the skin texture touch read line with an identification signal output by a skin texture touch read line adjacent thereto, and amplify a signal difference.
10. A display device comprising an acquisition device of skin texture data as claimed in any one of claims 1 to 9.
11. A method of collecting skin texture data, comprising:
detecting a touch area of skin texture on the touch device through a capacitive touch circuit;
selecting a touch central area in the touch area through a controller according to the distribution of the semaphore of a touch signal generated by skin texture contact in the touch area, selecting a characteristic area in the touch central area, and determining the characteristic area as a skin texture scanning area;
the skin texture in the skin texture scanning area is scanned by a skin texture recognition circuit and the skin texture data is generated.
12. The acquisition method according to claim 11, wherein the touch area further includes a touch edge area, the touch center area further includes a non-feature area,
wherein the selecting, by the controller, the touch center area in the touch area according to the distribution of the signal amount of the touch signal generated by the skin texture contact in the touch area, and the selecting the feature area in the touch center area comprises:
determining that a first area in the touch area is the touch central area and a second area in the touch edge area according to a first touch signal of a first signal quantity generated by the first area of the touch area and a first touch signal of a second signal quantity generated by the second area of the touch area, wherein the first signal quantity is not equal to the second signal quantity;
a third area of a second touch signal generating a third signal quantity by contacting the touch area according to the skin texture and a fourth area of the second touch signal generating a fourth signal quantity by contacting the touch area according to the skin texture, wherein the fourth area is determined as the characteristic area in the touch center area, the third area is determined as the non-characteristic area, and the third signal quantity is not equal to the fourth signal quantity.
13. The acquisition method as claimed in claim 12, wherein the ratio of the second signal quantity to the first signal quantity ranges between 2 and 4, and the ratio of the fourth signal quantity to the third signal quantity ranges between 1.09 and 1.33.
14. The acquisition method according to claim 12, wherein the first touch signal and the second touch signal are the same kind of touch signal, and a difference between the first semaphore and the second semaphore is larger than a difference between the third semaphore and the fourth semaphore.
15. The acquisition method according to claim 14, wherein the first touch signal and the second touch signal are both electrical touch signals, a first signal amount of the electrical touch signals in the touch center region is smaller than a second signal amount of the electrical touch signals in the touch edge region, and a third signal amount of the electrical touch signals in the characteristic region is smaller than a fourth signal amount of the electrical touch signals in the non-characteristic region.
16. The acquisition method according to claim 14, wherein the first touch signal and the second touch signal are both optical touch signals, a first signal amount of the optical touch signals in the touch center region is greater than a second signal amount of the optical touch signals in the touch edge region, and a third signal amount of the optical touch signals in the feature region is greater than a fourth signal amount of the optical touch signals in the non-feature region.
17. The acquisition method according to claim 14, wherein the first touch signal is one of an electrical touch signal and an optical touch signal, and the second touch signal is the other of the electrical touch signal and the optical touch signal.
18. The acquisition method according to any one of claims 11 to 17, wherein after determining the feature region as a skin texture scan area and before scanning skin texture within the skin texture scan area and generating skin texture data, the acquisition method further comprises:
scanning the skin texture contacted with the touch central area again by adopting a touch scanning mode different from that used when the characteristic area is selected; and
and confirming the selected characteristic area as the skin texture scanning area again according to the signal quantity distribution of the touch signal obtained again.
19. The acquisition method according to any one of claims 11 to 17, wherein the skin texture is a palm skin texture, the touch central area corresponds to a palm central portion, and the characteristic area corresponds to a main line in the palm central portion.
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| CN201911365475.XA CN113052154A (en) | 2019-12-26 | 2019-12-26 | Skin texture data acquisition device and acquisition method and display device thereof |
| US16/731,702 US10977476B2 (en) | 2015-06-01 | 2019-12-31 | Dermatoglyphics data acquisition device, acquisition method thereof and display device |
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