CN109828694B - Display device with identification and detection functions - Google Patents
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Abstract
The invention discloses a display device with identification and detection functions, which belongs to the technical field of electronics. Under the condition that original LCD light shade is not increased, fingerprint identification sensor and touch detection sensor are embedded in the specific area of the display device, fingerprint identification and touch detection in the specific area of the screen are achieved, the integration level of the terminal display product can be improved, production cost is reduced, meanwhile, the terminal display product, especially the portable electronic device, is lighter and thinner, more excellent appearance is obtained, and user experience is improved.
Description
Technical Field
The invention relates to the field of electronic circuits, in particular to a display device with identification and detection functions.
Background
At present, methods for integrating a fingerprint recognition sensor and a touch detection device in a display device and implementing a fingerprint recognition function and a touch detection function are continuously proposed. Therefore, under the condition that the original LCD light shield is not added, the fingerprint identification sensor and the touch detection sensor are embedded into the display equipment, so that fingerprint identification and touch detection in a specific area of a screen are realized, the integration level of a terminal display product can be improved, the production cost is reduced, meanwhile, the terminal display product, particularly the portable electronic equipment, is lighter and thinner, more excellent appearance is obtained, and the user experience is improved. The technology needs to be researched and developed according to the technical effects, so that a display device with a display screen having both a real function and fingerprint identification and touch control needs to be designed.
Disclosure of Invention
The invention aims to disclose a display device with identification and detection functions, and the invention embeds a fingerprint identification sensor in a specific area of the display device without adding an original LCD light shield, can realize the fingerprint identification function and the touch detection function on a display screen, can improve the integration level of a terminal display product, reduce the production cost, simultaneously enable the terminal display product, particularly a portable electronic device, to be lighter and thinner, obtain more excellent appearance and improve the use experience of a user.
The technical scheme adopted by the invention is as follows:
a display device having an identification and detection function, the display device including a plurality of detection blocks disposed at arbitrary positions of the display device, and an identification detection block for identifying a fingerprint signal and detecting a touch signal, the identification detection blocks being connected to a first DATA DATA line terminal, a second DATA DATA line terminal, a third DATA DATA line terminal, and a VCOM/TP line terminal.
Further, the recognition detection block includes a first DATA line, a second DATA line, a third DATA line, a VCOM/TP control line, a common electrode, three pixel electrodes, a first thin film transistor, a second thin film transistor, a third thin film transistor, and a fourth thin film transistor, the three pixel electrodes are disposed above or below the common electrode, the three pixel electrodes are electrically connected to the first thin film transistor, the second thin film transistor, and the third thin film transistor, respectively, the first thin film transistor is connected to the first DATA line, the second thin film transistor is connected to the second DATA line, the third thin film transistor is connected to the third DATA line, and the fourth thin film transistor is connected to the VCOM/TP control line and the common electrode.
Furthermore, the three pixel electrodes include a first pixel electrode, a second pixel electrode and a third pixel electrode, the first pixel electrode is connected with the first thin film transistor, the second pixel electrode is connected with the second thin film transistor, and the third pixel electrode is connected with the third thin film transistor.
Further, the identification detection block comprises a first display module, a second display module, a third display module and a control module; the first display module is connected with the control module through a second display module and a third display module, the first display module, the second display module, the third display module and the control module are all electrically connected with the SCAN scanning end, the first display module is connected with a first DATA DATA line end, the second display module is connected with a second DATA DATA line end, the third display module is connected with a third DATA DATA line end, and the control module is connected with a VCOM/TP line end; the first display module, the second display module and the third display module are all used for driving a display screen to display and forming a capacitance sensor for identification and detection; the control module is used for controlling the display screen to display and transmit a common electrode signal and transmitting a fingerprint identification and touch detection signal.
Further, the first display module includes a first transistor, a first pixel electrode, a first capacitor, and a fifth capacitor, where a gate of the first transistor is electrically connected to the SCAN terminal, a drain of the first transistor is connected to the first DATA line terminal, a source of the first transistor is connected to the first pixel electrode, the first pixel electrode is used as one end of the first capacitor, the other end of the first capacitor is a common electrode, and one end of the fifth capacitor is used as the common electrode and the other end of the fifth capacitor is connected to the first DATA line terminal.
Further, the second display module includes a second transistor, a second pixel electrode, a second capacitor, and a sixth capacitor, where a gate of the second transistor is electrically connected to the SCAN terminal, a drain of the second transistor is connected to the second DATA line terminal, a source of the second transistor is connected to the second pixel electrode, the second pixel electrode is used as one end of the second capacitor, the other end of the second capacitor is a common electrode, and one end of the sixth capacitor is used as the common electrode and the other end of the sixth capacitor is connected to the second DATA line terminal.
Furthermore, the third display module includes a third transistor, a third pixel electrode, a third capacitor, and a seventh capacitor, where a gate of the third transistor is electrically connected to the SCAN terminal, a drain of the third transistor is connected to the third DATA line terminal, a source of the third transistor is connected to the third pixel electrode, the third pixel electrode is used as one end of the third capacitor, the other end of the third capacitor is a common electrode, and one end of the seventh capacitor is used as the common electrode and the other end of the seventh capacitor is connected to the third DATA line terminal.
Furthermore, the control module comprises a fourth transistor and a fourth capacitor, a gate of the fourth transistor is electrically connected with the SCAN terminal, a drain of the fourth transistor is connected with the VCOM/TP terminal, a source of the fourth transistor is connected with the common electrode, and one end of the fourth capacitor is the common electrode and the other end of the fourth capacitor is electrically connected with the SCAN terminal.
The technical scheme of the invention has the following advantages:
1. the fingerprint identification Sensor is embedded in a specific area of the display device, so that the fingerprint identification function and the touch detection function can be realized on the display screen, the display drive and the scanning detection drive are arranged to work alternately and are not in sequence, because 4 transistors of the identification detection block share one scanning line and are simultaneously turned on and off, when the display drive is carried out, the SCAN scanning line is sent to a high-level turn-on transistor, the pixel electrode is sent to the signal voltage of a display picture by an IC through a DATA DATA line, and a Sensor is used as a common electrode and sent to VCOM voltage by the IC through a VCOM/TP line; when fingerprint identification and touch control are carried out, a Sensor is used as a capacitance Sensor, scanning detection signals are sent into the IC through VCOM/TP lines to carry out fingerprint identification processing or touch detection, at the moment, the same driving signals which are sent into the pixel electrodes by the IC and have the same change with the scanning detection signals ensure that the voltage difference between the pixel electrodes and the Sensor is always consistent with the voltage difference during display driving, so that the display effect is not influenced, meanwhile, the interference of DATA lines to the fingerprint identification signals or the touch detection signals is reduced, after the scanning detection is finished in the row, the signal voltage of a display picture is sent into the pixel electrodes through DATA DATA lines by the IC, VCOM voltage is sent into the Sensor through VCOM/TP lines, then the TFT is closed to carry out the work of the next row, and thus, the display, the fingerprint identification and the touch detection in a specific area of a screen are finished row by row.
2. According to the invention, under the condition that the original LCD light shield is not added, the fingerprint identification sensor and the touch detection sensor are embedded in the specific area of the display device, so that the fingerprint identification and the touch detection are realized in the specific area of the screen, the integration level of a terminal display product can be improved, the production cost is reduced, meanwhile, the terminal display product, especially the portable electronic device, is lighter and thinner, the more excellent appearance is obtained, and the user experience is improved.
Drawings
FIG. 1 is a block diagram of a display device with identification and detection functions having fingerprint identification and detection functions according to the present invention;
FIG. 2 is a block diagram of a display device with fingerprint recognition and detection functions according to the present invention;
FIG. 3 is a schematic diagram of a driving waveform of an identification detection unit of a display device having identification and detection functions according to the present invention;
FIG. 4 is a schematic diagram of a display device with identification and detection functions having a fingerprint identification function with a block identification detection unit of the present invention;
FIG. 5 is a block diagram of a display device with identification and detection functions according to the present invention with fingerprint identification and detection functions;
fig. 6 is a block diagram illustrating a detection block of a display device having an identification and detection function according to the present invention.
Description of the main elements
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The following detailed description will further illustrate the invention in conjunction with the above-described figures.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It is to be understood that the terminology used in the embodiments of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the examples of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.
The terms "comprising" and "having," and any variations thereof, in the description and claims of this invention and the above-described drawings are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.
It is noted that the following detailed description describes embodiments of the invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative only and should not be construed as limiting the invention.
The following disclosure provides many different embodiments, or examples, for implementing different features of the invention. To simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. Furthermore, the present invention may repeat reference numerals and/or letters in the various examples. This repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed.
Referring to fig. 1, a block structure diagram of a display device with identification and detection functions having fingerprint identification and detection functions according to the present invention is shown, and as can be seen from fig. 5 and 6, a display device with identification and detection functions includes a plurality of detection blocks and an identification and detection block, and the identification and detection block is disposed at any position of the display device. The identification detection block can be arranged at any place of the display device, but is not generally arranged at the place of the comparison corner, so as to facilitate the identification of the fingerprint. The identification detection blocks are each connected to the first DATA line terminal DATA1, the second DATA line terminal DATA2, the third DATA line terminal DATA3, and the VCOM/TP line terminal. The recognition detecting block includes a first DATA line DATA1, a second DATA line DATA2, a third DATA line DATA3, a VCOM/TP control line, a common electrode 5, three pixel electrodes 6, a first thin film transistor 7, a second thin film transistor 8, a third thin film transistor 9, and a fourth thin film transistor 10, the three pixel electrodes 6 are disposed above or below the common electrode 5, the three pixel electrodes 6 are electrically connected to the first thin film transistor 7, the second thin film transistor 8, and the third thin film transistor 9, respectively, the first thin film transistor 7 is connected to the first DATA line DATA1, the second thin film transistor 8 is connected to the second DATA line DATA2, the third thin film transistor 9 is connected to the third DATA line DATA3, and the fourth thin film transistor 10 is connected to the VCOM/TP control line and the common electrode 5. The three pixel electrodes 6 include a first pixel electrode, a second pixel electrode, and a third pixel electrode, the first pixel electrode is connected to the first thin film transistor, the second pixel electrode is connected to the second thin film transistor, and the third pixel electrode is connected to the third thin film transistor. The first DATA line, the second DATA line, the third DATA line and the VCOM/TP control line can be shared by a plurality of identification and detection blocks, so that the occupied area of space is small, the production cost is reduced, and meanwhile, a terminal display product, particularly a portable electronic device, is lighter and thinner, and has more excellent appearance.
It can be seen that the display device with the identification and detection functions in the technical solution of the embodiment of the present invention includes a plurality of detection blocks and an identification detection block, and the identification detection block is disposed at any position of the display device. The detection block is a display touch block of the display screen, and mainly forms a display touch function of the display screen.
Fig. 5 is a block diagram illustrating a display device with identification and detection functions having a fingerprint identification function and a detection function according to an embodiment of the present invention. This piecemeal constitutes fingerprint identification and detection function, the discernment detects the piecemeal and as the special unit that has the discernment and detects the function of display screen, it detects the fingerprint and detects the function of touch to have the demonstration, thereby make embedding fingerprint identification sensor and touch detection sensor array in display device, realize fingerprint identification and touch detection in the specific area in the screen, can improve the integrated level of terminal display product, and the production cost is reduced, make terminal display product especially portable electronic equipment lighter and thinner simultaneously, obtain more excellent outward appearance, improve user's use experience.
Referring to fig. 4, a schematic diagram of a block-based recognition detecting unit of a display device with recognition and detecting functions according to an embodiment of the present invention, as shown in fig. 4, the circuit with fingerprint identification function comprises a first display module 1, a second display module 2, a third display module 3 and a control module 4, wherein the first display module 1 is connected with the control module 4 via the second display module 2 and the third display module 3, the first display module 1, the second display module 2, the third display module 3 and the control module 4 are all electrically connected with a SCAN terminal of SCAN, the first display module 1 is connected with a first DATA DATA line terminal DATA1, the second display module 2 is connected with a second DATA DATA line terminal DATA2, the third display module 3 is connected with a third DATA DATA line terminal DATA3, and the control module 4 is connected with a VCOM/TP line terminal. When the display screen displays, the first display module, the second display module and the third display module are all used for driving the display screen to display, and the display driving function of the display screen is completed. When fingerprint identification and touch detection are needed, the touch detection control circuit is used for controlling and scanning identification fingerprint data and scanning detection touch data, so that display, fingerprint identification and touch detection are achieved by one circuit, three functions of a good bar are combined together, the integration level of a terminal display product is lowered, production cost is lowered, meanwhile, the terminal display product, particularly portable electronic equipment, is lighter and thinner, more excellent appearance is obtained, and user experience is improved.
The control module 4 is used for controlling the display of the display screen and transmitting the common electrode signal, and mainly inputs the common electrode signal through a VCOM/TP line terminal. The control module 4 is also used for transmitting signals of fingerprint identification and touch detection, and data needs to be transmitted on the fingerprint verification device and the display screen controller after the data of the fingerprint and the touch detection data are detected.
Each circuit block is described in detail below.
The first display module 1 includes a first transistor T1, a first capacitor C1, and a fifth capacitor C5. The gate of the first transistor T1 is electrically connected to the SCAN terminal, the drain is connected to the DATA terminal DATA1, and the source is connected to one end of the first capacitor C1. The other end of the first capacitor C1 is a common electrode, one end of the fifth capacitor C5 is a common electrode, and the other end is connected to the first DATA line terminal DATA 1. The first transistor T1 is controlled to be turned on and off by the SCAN terminal input, and the first DATA line is used for transmitting a display driving signal and a common driving signal.
The second display module comprises a second transistor T2, a second capacitor C2 and a sixth capacitor C6, wherein the gate of the second transistor T2 is electrically connected to the SCAN terminal, the drain is connected to the second DATA terminal DATA2, and the source is connected to one end of the second capacitor C2. The other end of the second capacitor C2 is a common electrode, one end of the sixth capacitor C6 is a common electrode, and the other end is connected to the second DATA line terminal DATA 2. The second DATA line DATA2 is used to transmit a display driving signal and a common driving signal by controlling the turn-on and turn-off of the second transistor T2 through the SCAN terminal input.
The third display module 3 includes a third transistor T3, a third capacitor C3, and a seventh capacitor C7, where a gate of the third transistor T3 is electrically connected to the SCAN terminal, a drain of the third transistor T3 is connected to the DATA3 terminal of the third DATA line, a source of the third transistor T3 is connected to one end of the third capacitor C3, the other end of the third capacitor C3 is a common electrode, one end of the seventh capacitor C7 is a common electrode, and the other end of the seventh capacitor C7 is connected to the DATA3 terminal of the third DATA line. The third transistor T3 is controlled to be turned on and off by the SCAN terminal input. The third DATA line DATA3 is used to transmit display driving signals and common driving signals.
The control module 4 comprises a fourth transistor T4 and a fourth capacitor C4, the gate of the fourth transistor T4 is electrically connected to the SCAN terminal, the drain is connected to the VCOM/TP terminal, the source is connected to the common electrode, and one end of the fourth capacitor C4 is the common electrode and the other end is electrically connected to the SCAN terminal. The VCOM/TP line terminal is used for transmitting a signal of the common electrode during display driving, and for transmitting a sensing signal and a sensing signal, and transmitting fingerprint recognition data and touch data during fingerprint recognition and touch detection.
One scanning line SCAN controls the switch of the pixel TFT and the Sensor TFT; c1, C2 and C3 are capacitors formed by the three sub-pixels and the common electrode respectively and comprise pixel capacitors, liquid crystal capacitors and the like; c4, C5, C6 and C7 are respectively capacitors formed by the common electrode and SCAN, DATA1, DATA2 and DATA 3; the signal of the common electrode Sensor is transmitted by the VCOM/TP trace.
The display drive and the scanning detection drive work alternately in no sequence, and 4 TFTs share one scanning line, so that the 4 TFTs are simultaneously turned on and off. During display driving, the SCAN scanning line sends high level to turn on the transistor, the pixel electrode sends signal voltage of display picture to the IC through the DATA DATA line, the Sensor is used as a common electrode and sends VCOM voltage to the IC through the VCOM/TP line; when fingerprint identification and touch control are carried out, the Sensor is used as a capacitance Sensor, the IC sends scanning detection signals through VCOM/TP lines to carry out fingerprint identification processing or touch detection, at the moment, the pixel electrode sends same-driving signals (figure 3 is a same-driving schematic diagram) which are consistent with the scanning detection signals through DATA DATA lines, the voltage difference between the pixel electrode and the Sensor is ensured to be consistent with the voltage difference during display driving, the display effect is not influenced, and meanwhile, the interference of the DATA lines on the fingerprint identification signals or the touch detection signals is reduced. After the scanning detection of the line is finished, the IC sends signal voltage of a display picture to the pixel electrode through the DATA DATA line, sends display voltage to the Sensor through the VCOM/TP line, and then closes the TFT to carry out the operation of the next line, thus finishing the display, fingerprint identification and touch detection in a specific area of the screen line by line.
The working process is explained according to fig. 1-6:
a common electrode layer of the LCD is partitioned, a TFT and a control line are added to form a fingerprint identification sensor and a touch detection sensor array, and the functions of fingerprint identification and touch detection in a specific area are realized in the display.
The common electrode layer of the LCD is partitioned, and a TFT and a control line are added, so that a basic fingerprint identification sensor and a touch sensor array are formed on the whole screen; and the partitioned common electrode layers are multiplexed in a time-sharing manner, one time is only used for the displayed common electrode, and the other time is simultaneously used as the displayed common electrode, the fingerprint identification sensor and the touch detection sensor, so that fingerprint identification and touch detection in a specific area of the screen are realized.
A common electrode layer (made of ITO or other transparent conductive materials) is partitioned on an LCD Array substrate in an IPS or FFS display mode, and control wires (the same layer as data lines and can be made of metal or other conductors) and TFTs are added for control and driving, so that a basic fingerprint identification sensor or a touch sensor is formed.
The common electrode is divided into blocks, a Sensor TFT is added, and a wiring is arranged to form an independent fingerprint identification Sensor or touch Sensor. Wherein, the Sensor is a common electrode, and forms a control electrode of liquid crystal and a storage capacitor of a pixel together with a pixel electrode during display driving; during fingerprint identification and touch control, the Sensor is used as a Sensor; DATA1, DATA2, and DATA3 are DATA lines for transmitting signals of display pixels; VCOM/TP is a control wire, and is used for transmitting a common electrode signal and transmitting a signal of a fingerprint identification sensor or a touch sensor; and the SCAN is a scanning line and is combined with the pixel TFT and the Sensor TFT to control the transmission of pixel signals and Sensor signals.
The invention adopts a projection type self-capacitance detection principle, and when a human finger touches a screen, a common electrode is used as an induction Sensor to detect the change of the capacitance. Because the distance from the uneven fingerprint of the dermis of the finger to the fingerprint identification Sensor is inconsistent and the capacitance values formed between the uneven fingerprint and the fingerprint identification Sensor are inconsistent, the Sensor senses different capacitance change signals and transmits the signals to the IC, and the signals are converted into digital signals through the IC. Because each Sensor can be as small as the pixel size, accurate fingerprint characteristic data can be collected and then compared with the fingerprint characteristic data in the database to finish fingerprint identification and touch detection.
LCD, Liquid Crystal Display, LCD;
a TFT: thin Film Transistor (tft);
IPS In-Plane Switching, In-Plane Switching display technology;
FFS, Fringe Filed Switching technology;
array is an Array substrate of a liquid crystal display;
a Sensor: a sensor;
and (3) simultaneous driving: synchronously driving;
IC: integrated circuit, and driving chip of LCD.
The invention realizes the sensor array design by adding the wiring and the TFT in the LCD structure of IPS or FFS display mode, and can be used for singly designing the LCD structure
Individually addressing each sensor block; the sensor tile size may be one or more pixels, sub-pixels; each sensor
The blocks can be controlled by one or more groups of wires and TFTs; TFT types include amorphous silicon, polycrystalline silicon, single crystal silicon, metal oxides, poly-silicon, poly-oxide, poly-silicon, poly-oxide, poly-silicon, poly-oxide, poly-silicon, and poly-oxide, poly-silicon, poly-oxide, poly-oxide, poly-silicon, poly-oxide,
Organic matter, and the like.
The invention has the following beneficial effects:
the invention works alternately by setting display drive and scanning detection drive, the sequence is not sequential, because 4 transistors share one scanning line, and are turned on and off simultaneously, when the display drive is performed, the SCAN scanning line is sent to a high level to turn on the transistor, the pixel electrode is sent to the signal voltage of the display picture by IC through a DATA DATA line, the Sensor is used as a common electrode and sent to VCOM voltage by IC through a VCOM/TP line; when fingerprint identification and touch control are carried out, a Sensor is used as a capacitance Sensor, scanning detection signals are sent into an IC through VCOM/TP lines by the IC to carry out fingerprint identification processing or touch detection, at the moment, the same-driving signals which are sent into a pixel electrode through a DATA line and have the same change with the scanning detection signals by the IC ensure that the voltage difference between the pixel electrode and the Sensor is always consistent with the voltage difference during display driving, so that the display effect is not influenced, meanwhile, the interference of the DATA lines to the fingerprint identification signals or the touch detection signals is reduced, after the scanning detection is finished in the line, the signal voltage of a display picture is sent into the pixel electrode through the DATA DATA line by the IC, the display voltage is sent into the Sensor through the VCOM/TP lines, then the TFT is closed to carry out the work of the next line, and thus the display, the fingerprint identification and the touch detection in a specific area of a screen are finished line by line. According to the invention, under the condition that the original LCD photomask is not added, the fingerprint identification sensor and the touch detection sensor are embedded in the display equipment, so that the fingerprint identification and the touch detection in the specific area of the screen are realized, the integration level of the terminal display product can be improved, the production cost is reduced, meanwhile, the terminal display product, especially the portable electronic equipment, is lighter and thinner, the more excellent appearance is obtained, and the use experience of a user is improved.
Claims (7)
1. A display device having identification and detection functions, characterized in that: the display device comprises a plurality of detection blocks and an identification detection block, wherein the identification detection block is arranged at any position of the display device and is used for identifying fingerprint signals and detecting touch signals, and the identification detection block is connected with a first DATA DATA line end, a second DATA DATA line end, a third DATA DATA line end and a VCOM/TP line end;
the identification detection block comprises a first display module, a second display module, a third display module and a control module; the first display module is connected with the control module through a second display module and a third display module, the first display module, the second display module, the third display module and the control module are all electrically connected with the SCAN scanning end, the first display module is connected with a first DATA DATA line end, the second display module is connected with a second DATA DATA line end, the third display module is connected with a third DATA DATA line end, and the control module is connected with a VCOM/TP line end; the first display module, the second display module and the third display module are all used for driving a display screen to display and forming a capacitance sensor for identification and detection; the control module is used for controlling the display screen to display and transmit a common electrode signal and transmitting a fingerprint identification and touch detection signal.
2. A display device with identification and detection functions according to claim 1, characterized in that: the identification detection block comprises a first DATA DATA line, a second DATA DATA line, a third DATA DATA line, a VCOM/TP control line, a common electrode, three pixel electrodes, a first thin film transistor, a second thin film transistor, a third thin film transistor and a fourth thin film transistor, wherein the three pixel electrodes are arranged above or below the common electrode, the three pixel electrodes are respectively and electrically connected with the first thin film transistor, the second thin film transistor and the third thin film transistor, the first thin film transistor is connected with the first DATA DATA line, the second thin film transistor is connected with the second DATA DATA line, the third thin film transistor is connected with the third DATA DATA line, and the fourth thin film transistor is connected with the VCOM/TP control line and the common electrode.
3. A display device with identification and detection functions according to claim 2, characterized in that: the three pixel electrodes comprise a first pixel electrode, a second pixel electrode and a third pixel electrode, the first pixel electrode is connected with the first thin film transistor, the second pixel electrode is connected with the second thin film transistor, and the third pixel electrode is connected with the third thin film transistor.
4. A display device with identification and detection functions according to claim 1, characterized in that: the first display module comprises a first transistor, a first pixel electrode, a first capacitor and a fifth capacitor, wherein the grid electrode of the first transistor is electrically connected with the SCAN scanning end, the drain electrode of the first transistor is connected with the first DATA DATA line end, the source electrode of the first transistor is connected with the first pixel electrode, the first pixel electrode is used as one end of the first capacitor, the other end of the first capacitor is a common electrode, and one end of the fifth capacitor is used as the common electrode and the other end of the fifth capacitor is connected with the first DATA DATA line end.
5. A display device with identification and detection functions according to claim 4, characterized in that: the second display module comprises a second transistor, a second pixel electrode, a second capacitor and a sixth capacitor, wherein the grid electrode of the second transistor is electrically connected with the SCAN scanning end, the drain electrode of the second transistor is connected with the second DATA DATA line end, the source electrode of the second transistor is connected with the second pixel electrode, the second pixel electrode serves as one end of the second capacitor, the other end of the second capacitor is a common electrode, and one end of the sixth capacitor serves as the common electrode and is connected with the second DATA DATA line end.
6. A display device with identification and detection functions according to claim 5, characterized in that: the third display module comprises a third transistor, a third pixel electrode, a third capacitor and a seventh capacitor, wherein the grid electrode of the third transistor is electrically connected with the SCAN scanning end, the drain electrode of the third transistor is connected with a third DATA DATA line end, the source electrode of the third transistor is connected with the third pixel electrode, the third pixel electrode is used as one end of the third capacitor, the other end of the third capacitor is a common electrode, and one end of the seventh capacitor is used as a common electrode and the other end of the seventh capacitor is connected with the third DATA DATA line end.
7. A display device with identification and detection functions according to claim 1, characterized in that: the control module comprises a fourth transistor and a fourth capacitor, the grid electrode of the fourth transistor is electrically connected with the SCAN scanning end, the drain electrode of the fourth transistor is connected with the VCOM/TP line end, the source electrode of the fourth transistor is connected with the common electrode, one end of the fourth capacitor is a common electrode, and the other end of the fourth capacitor is electrically connected with the SCAN scanning end.
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| US11308306B2 (en) | 2015-08-19 | 2022-04-19 | Novatek Microelectronics Corp. | Control method for optical fingerprint sensor and related control circuit |
| US11295108B2 (en) | 2015-08-19 | 2022-04-05 | NOVATEK Microeletronics Corp. | Control method for optical fingerprint sensor and related control circuit and optical fingerprint sensor |
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