CN109753952B - Circuit with full-screen recognition and detection functions and equipment thereof - Google Patents
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Abstract
The invention discloses a circuit with full screen identification and detection functions and equipment thereof, belonging to the technical field of electronics. 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, full-screen fingerprint identification and touch detection 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, the appearance is more excellent, and the use experience of a user is improved.
Description
Technical Field
The invention relates to the field of electronic circuits, in particular to a circuit with full-screen recognition and detection functions and equipment thereof.
Background
At present, methods for integrating a fingerprint identification sensor and a touch detection device in a display device and realizing a fingerprint identification function and a touch detection function are continuously proposed. Therefore, the technology development needs to embed the fingerprint identification sensor and the touch detection sensor in the display device without increasing the original LCD photomask, so that the full-screen fingerprint identification and the touch detection are realized, the integration level of the terminal display product can be improved, the production cost is reduced, meanwhile, the terminal display product, particularly the portable electronic device, is lighter and thinner, the more excellent appearance is obtained, and the use experience of a user is improved. The technology needs to be researched and developed according to the technical effects, so that a display device with a display screen and a real function and fingerprint identification and touch control needs to be designed.
Disclosure of Invention
The invention aims to disclose a circuit with full screen recognition and detection functions and equipment thereof, and the circuit is characterized in that a fingerprint recognition sensor and a touch detection sensor are embedded in display equipment under the condition that an original LCD photomask is not added, so that full screen fingerprint recognition and touch detection are realized, the integration level of a terminal display product can be improved, the production cost is reduced, meanwhile, the terminal display product, particularly a portable electronic equipment, is lighter and thinner, a more excellent appearance is obtained, and the user experience is improved.
The technical scheme adopted by the invention is as follows:
the full-screen identification and detection functional circuit comprises a multi-stage identification and detection unit, wherein the nth-stage identification and detection unit 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 the second display module and the 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 the first DATA DATA line end, the second display module is connected with the second DATA DATA line end, the third display module is connected with the third DATA DATA line end, and the control module is connected with the VCOM/TP line end;
the first display module, the second display module and the third display module are used for driving the display screen to display and forming a capacitive sensor for identification detection;
the control module is used for driving the display screen public electrode signal, driving the fingerprint identification and touch detection signal, and transmitting fingerprint identification data and touch data.
Further, the first display module comprises a first transistor, a first pixel electrode, a first capacitor and a fifth capacitor, wherein a grid electrode of the first transistor is electrically connected with a SCAN scanning line end, a drain electrode of the first transistor is connected with a first DATA line end, a 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 a common electrode, and the other end of the fifth capacitor is connected with the first DATA line end.
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 line end, a drain of the second transistor is connected to the second DATA line end, 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 connected to the second DATA line end.
Further, 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 line end, a drain of the third transistor is connected to the second DATA line end, a source of the third transistor is connected to the third pixel electrode, the third pixel electrode is used as one end of the second capacitor, the other end of the third capacitor is a common electrode, and one end of the seventh capacitor is a common electrode, and the other end of the seventh capacitor is connected to the third DATA line end.
Further, the control module comprises a fourth transistor and a fourth capacitor, wherein 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 wire end, the source electrode 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 scanning end.
An apparatus having full screen recognition and detection functionality, the apparatus comprising a plurality of recognition detection tiles, each recognition detection tile being connected to a first DATA line terminal, a second DATA line terminal, a third DATA line terminal, and a VCOM/TP line terminal, respectively.
Further, the identification detection block comprises 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, wherein the three pixel electrodes are arranged above or below the common electrode and 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 line, the second thin film transistor is connected with the second DATA line, the third thin film transistor is connected with the third DATA line, and the fourth thin film transistor is connected with the VCOM/TP control line and the common electrode.
Further, 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.
The technical scheme of the invention has the following advantages:
1. the invention alternately works by setting the display drive and the scanning detection drive, and the sequence is not sequential, and as 4 transistors of each identification detection unit share one scanning line, the invention is simultaneously opened and closed. During display driving, the SCAN scanning line is fed into the high-level switching-on transistor, the pixel electrode is fed into the signal voltage of a display picture by the IC through the DATA DATA line, and the Sensor is used as a common electrode and is fed into the VCOM voltage by the IC through the VCOM/TP line; when fingerprint identification and touch scanning are performed, the Sensor is used as a capacitance Sensor, an IC sends a scanning detection signal through a VCOM/TP line to perform fingerprint identification processing or touch detection, at the moment, a common driving signal consistent with the change of the scanning detection signal is sent by the IC through a DATA DATA line to ensure that the voltage difference between the pixel electrode and the Sensor is consistent with the voltage difference during display driving, so that the display effect is not affected, meanwhile, the interference of the DATA line on the fingerprint identification signal or the touch detection signal is reduced, after the scanning detection of the line is completed, the signal voltage of a display picture is sent to the pixel electrode through the DATA DATA line by the IC, and the display voltage is sent to the Sensor through the VCOM/TP line. After the display driving and the scanning detection driving are completed, the low level is sent to turn off the TFTs of the row through the SCAN scanning line. The next row of driving repeats the action, so that the row by row works to complete the display of the full screen, fingerprint identification and touch detection.
2. 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 full-screen fingerprint identification and touch detection 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, a more excellent appearance is obtained, and the user experience is improved.
Drawings
FIG. 1 is a schematic diagram of an identification and detection unit with full screen identification and detection function circuit of the present invention;
FIG. 2 is a block diagram of a circuit module with full screen recognition and detection functionality in accordance with the present invention;
FIG. 3 is a schematic diagram of a drive waveform of an identification detection unit with full screen identification and detection function circuit according to the present invention;
FIG. 4 is a schematic diagram of a Sensor block architecture of a device with full screen recognition and detection functionality of the present invention;
FIG. 5 is a schematic diagram of a Sensor segment with full screen recognition and detection functionality of the present invention;
FIG. 6 is a schematic diagram of a Sensor block architecture of another embodiment of a device with full screen recognition and detection functionality of the present invention;
FIG. 7 is a schematic diagram of a Sensor block diagram of another embodiment of a device with full screen recognition and detection functionality of the present invention.
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The invention will be further described in the following detailed description in conjunction with the above-described figures.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It is noted that the terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in this application 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 or 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 the invention and in the foregoing 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 listed steps or elements but may include other steps or elements not listed or inherent to such process, method, article, or apparatus.
It should be noted that, embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the invention.
The following disclosure provides many different embodiments, or examples, for implementing different structures of the invention. In order to simplify the present disclosure, components and arrangements of specific examples are described below. They are, of course, merely examples and are not intended to limit the 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.
Example 1
Referring to fig. 2, a block diagram of a circuit module with full-screen recognition and detection function according to an embodiment of the present invention is shown in fig. 2, where the recognition and detection function includes a multi-stage recognition and detection unit, and one recognition and detection unit is used as a minimum display unit of a display screen, so that one recognition and detection unit can independently complete driving display of the display screen, and can also complete recognition and touch detection of fingerprints. The nth-level identification detection unit 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 through 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 scanning end, the first display module 1 is connected with a first DATA DATA line end DATA1, the second display module 2 is connected with a second DATA DATA line end DATA2, the third display module 3 is connected with a third DATA DATA line end DATA3, and the control module 4 is connected with a VCOM/TP line end. When the display screen displays, the first display module, the second display module, the third display module and the control 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 circuit is used for controlling and scanning the fingerprint identification data and simultaneously scanning and detecting the touch data, so that one circuit realizes display, fingerprint identification and touch detection, three functions are well combined together, the integration level of a terminal display product is reduced, the production cost is reduced, meanwhile, the terminal display product, particularly the portable electronic equipment, is lighter and thinner, the appearance is more excellent, and the user experience is improved.
The control module 4 is used for displaying and transmitting a common electrode signal to the control display screen, and the common electrode signal is mainly input through the VCOM/TP terminal. The control module 4 is also used for transmitting signals of fingerprint identification and touch detection, and after detecting fingerprint data and touch detection data, the data needs to be transmitted on the fingerprint verification device and the display screen controller.
It can be seen that the technical scheme of the embodiment of the invention has a full-screen recognition and detection function circuit, wherein each recognition and detection unit comprises a first display module, a second display module, a third display module and a control module.
Referring to fig. 1, a schematic circuit diagram with full screen recognition and detection functions is provided in an embodiment of the present invention.
Each of the circuit modules 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 end, the drain is connected to the first DATA line end 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, and one end of the fifth capacitor C5 is a common electrode, and the other end is connected with the first DATA line terminal DATA 1. The first transistor T1 is controlled to be turned on and off by the SCAN end. The first DATA line is used for transmitting a display driving signal and a common driving signal.
The second display module 2 includes a second transistor T2, a second capacitor C2, and a sixth capacitor C6, where a gate of the second transistor T2 is electrically connected to the SCAN end, a drain of the second transistor T2 is connected to the second DATA line terminal DATA2, and a source of the second transistor T2 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 for transmitting the display driving signal and the common driving signal by controlling the on and off of the second transistor T2 through the SCAN scanning end.
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 end, a drain of the third transistor T is connected to the third DATA line DATA3 end, a source of the third transistor T 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 third DATA line DATA3 end. The third transistor T3 is turned on and off by the SCAN end control. The third DATA line DATA3 is used for transmitting the display driving signal and the common driving signal.
The control module 4 comprises a fourth transistor T4 and a fourth capacitor C4, wherein the grid electrode of the fourth transistor T4 is electrically connected with the SCAN scanning end, the drain electrode of the fourth transistor T4 is connected with the VCOM/TP terminal, the source electrode of the fourth transistor T is connected with the common electrode, one end of the fourth capacitor C4 is a common electrode, and the other end of the fourth capacitor C4 is electrically connected with the SCAN scanning end. The VCOM/TP terminal is used for transmitting signals of the common electrode during display driving, and is used for transmitting detection signals and sensing signals, fingerprint identification data and touch data during fingerprint identification and touch detection. .
A SCAN line SCAN controls the switching of the pixel TFT and Sensor TFT; c1, C2 and C3 are capacitances formed by pixel electrodes and common electrodes of three sub-pixels respectively, including pixel capacitance, liquid crystal capacitance and the like; c4, C5, C6 and C7 are capacitors formed by the common electrode and SCAN, DATA1, DATA2 and DATA3 respectively; the signal of the common electrode Sensor is transmitted by the VCOM/TP wiring.
The invention alternately works by setting the display drive and the scanning detection drive, and the sequence is not sequential, and as 4 transistors of each identification detection unit share one scanning line, the invention is simultaneously opened and closed. During display driving, the SCAN scanning line is fed into the driving voltage switching-on transistor, the pixel electrode is fed into the signal voltage of the display picture by the IC through the DATA DATA line, and the Sensor is used as a common electrode and is fed into the VCOM voltage by the IC through the VCOM/TP line; when fingerprint identification and touch scanning are performed, the Sensor is used as a capacitance Sensor, an IC sends a scanning detection signal through a VCOM/TP line to perform fingerprint identification processing or touch detection, at the moment, a common driving signal consistent with the change of the scanning detection signal is sent to the pixel electrode through a DATA DATA line by the IC, so that the voltage difference between the pixel electrode and the Sensor is consistent with the voltage difference during display driving, the display effect is not affected, meanwhile, the interference of the DATA line on the fingerprint identification signal or the touch detection signal is reduced, after the scanning detection of the line is completed, the signal voltage of a display picture is sent to the pixel electrode through the DATA DATA line by the IC, and the VCOM voltage is sent to the Sensor through the VCOM/TP line. After the display driving and the scanning detection driving are completed, the driving voltage is sent to the TFTs of the row through the SCAN scanning lines to turn off the TFTs of the row. The next row of driving repeats the action, so that the row by row works to complete the display of the full screen, fingerprint identification and touch detection.
FIG. 5 is a block diagram of a device with full screen recognition and detection functionality according to the present invention:
the device with the full screen recognition and detection function comprises a plurality of display modules and a control module, wherein each display module is respectively connected with a first DATA wire end, a second DATA wire end and a third DATA wire end, and the control module is connected with a VCOM/TP wire end. Each of the display modules 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, and 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 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.
It can be seen that, in the technical solution of the embodiment of the present invention, each block identification and 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 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 detection blocks, and under the condition that an original LCD photomask is not added, a fingerprint identification sensor and a touch detection sensor are embedded in the display device, so that full-screen fingerprint identification and touch detection are realized.
Fig. 4 is a schematic block diagram of a device with full-screen recognition and detection functions according to an embodiment of the present invention. The plurality of recognition detection blocks form recognition and detection functional equipment, each recognition detection block is used as a minimum display unit of the display screen, and has the functions of displaying, detecting fingerprints and detecting touches, so that the fingerprint recognition sensor and the touch detection sensor are embedded in the display equipment, full-screen fingerprint recognition and touch detection 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, the appearance is more excellent, and the user experience is improved.
The operation is described with reference to fig. 1-5:
the common electrode layer of the LCD is segmented, TFTs and control lines are added to form a fingerprint identification sensor and a touch detection sensor array, and full-screen fingerprint identification and touch detection functions are realized in the display.
The common electrode layer of the LCD is segmented, TFTs and control lines are added, and a basic fingerprint identification sensor and a touch sensor array are formed on the whole screen; the partitioned public electrode layers are multiplexed in a time-sharing way, the partitioned public electrode layers are only used for displaying public electrodes for a period of time, and the partitioned public electrode layers are simultaneously used as the displayed public electrodes, the fingerprint identification sensor and the touch detection sensor for another period of time, so that full-screen fingerprint identification and touch detection are realized.
The common electrode layer (ITO or other transparent conductive materials) is segmented on the LCD Array substrate in the IPS or FFS display mode, and control wires (the same layer as the data wires and the 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 segmented, and Sensor TFTs and wirings are added to form an independent fingerprint identification Sensor or touch Sensor. Wherein Sensor is a common electrode, and forms a control electrode of liquid crystal and a storage capacitor of pixel together with the pixel electrode during display driving; when fingerprint identification and touch control are performed, the Sensor is used as a Sensor; DATA1, DATA2, DATA3 are DATA lines for transmitting signals of the display pixels; VCOM/TP is control wiring for transmitting common electrode signal and fingerprint identification sensor or touch sensor signal; the SCAN is a SCAN line, combines the pixel TFT and the Sensor TFT, and is used to control the transmission of the pixel signal and the Sensor signal.
The invention adopts the projection type self-capacitance detection principle, and when a human finger touches the screen, the common electrode is used as an induction Sensor to detect the change of the capacitance. Because the distances from the uneven fingerprint of the dermis layer of the finger to the fingerprint identification Sensor are inconsistent, 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 capacitance change signals to the IC, and the capacitance change 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 fingerprint identification and touch detection can be completed by comparing the fingerprint characteristic data with the fingerprint characteristic data in the database.
In the LCD structure of the IPS or FFS display mode, the sensor array is designed by adding the wiring and the TFT, and each sensor can be individually addressed and controlled; the single sensor, namely the identification detection unit, can be composed of one or more pixels and a common electrode contained in the sub-pixels; each sensor may be controlled with one or more sets of traces plus TFTs. The method comprises the steps of carrying out a first treatment on the surface of the TFT types include amorphous silicon, polysilicon, metal oxides, organic, and the like.
An LCD Liquid Crystal Display, a liquid crystal display;
TFT: thin Film Transistor, thin film transistor;
IPS In-Plane Switching, in-Plane Switching display technology;
FFS Fringe Filed Switching, fringe field switching technique;
array substrate of LCD;
sensor: a sensor;
and (3) co-driving: synchronous driving;
IC: integrated circuit, an integrated circuit, and a driving chip of a liquid crystal display.
The invention has the following beneficial effects:
the invention alternately works by setting the display drive and the scanning detection drive, and the sequence is not sequential, and 4 transistors share one scanning line and are simultaneously turned on and turned off. During display driving, the SCAN scanning line is fed into the high-level switching-on transistor, the pixel electrode is fed into the signal voltage of a display picture by the IC through the DATA DATA line, and the Sensor is used as a common electrode and is fed into the VCOM voltage by the IC through the VCOM/TP line; when fingerprint identification and touch scanning are performed, the Sensor is used as a capacitance Sensor, an IC sends a scanning detection signal through a VCOM/TP line to perform fingerprint identification processing or touch detection, at the moment, a common driving signal consistent with the change of the scanning detection signal is sent by the IC through a DATA DATA line to ensure that the voltage difference between the pixel electrode and the Sensor is consistent with the voltage difference during display driving, so that the display effect is not affected, meanwhile, the interference of the DATA line on the fingerprint identification signal or the touch detection signal is reduced, after the scanning detection of the line is completed, the signal voltage of a display picture is sent to the pixel electrode through the DATA DATA line by the IC, and the display voltage is sent to the Sensor through the VCOM/TP line. After the display driving and the scanning detection driving are completed, the low level is sent to turn off the TFTs of the row through the SCAN scanning line. The next row of driving repeats the action, so that the row by row works to complete the display of the full screen, fingerprint identification and touch detection. 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 full-screen fingerprint identification and touch detection 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, a more excellent appearance is obtained, and the user experience is improved.
Example 2
As shown in fig. 6-7, another Sensor block structure schematic diagram, the device includes a plurality of display modules and a control module, each display module is connected to a DATA line terminal, and the control module is connected to a VCOM/TP line terminal. As shown in fig. 7, an identification detection unit is composed of only a single sub-pixel, and includes a display module and a control module. The display module includes a DATA line DATA, a VCOM/TP control line, a common electrode 5, a pixel electrode 6, a first thin film transistor 7, and a fourth thin film transistor 10. The pixel electrode 6 is disposed above or below the common electrode 5, and the pixel electrode 6 is electrically connected to the first thin film transistor 7. The first thin film transistor 7 is connected to the DATA line DATA, and the fourth thin film transistor 10 is connected to the VCOM/TP control line and the common electrode 5. The pixel electrode is connected with the first thin film transistor.
The common electrode is segmented, and Sensor TFTs and wirings are added to form an independent fingerprint identification Sensor or touch Sensor. Wherein Sensor is a common electrode, and forms a control electrode of liquid crystal and a storage capacitor of pixel together with the pixel electrode during display driving; when fingerprint identification and touch control are performed, the Sensor is used as a Sensor; DATA is a DATA line for transmitting signals of the display pixels; VCOM/TP is control wiring for transmitting common electrode signal and fingerprint identification sensor or touch sensor signal; the SCAN is a SCAN line, combines the pixel TFT and the Sensor TFT, and is used to control the transmission of the pixel signal and the Sensor signal.
Claims (5)
1. A circuit with full screen recognition and detection functions, characterized in that: the recognition and detection functional circuit comprises a multi-stage recognition detection unit, wherein the nth stage recognition detection unit comprises a first display module, a second display module, a third display module and a control module; the first display module, the second display module and the third display module are connected with the control module through common electrodes, the first display module, the second display module, the third display module and the control module are all electrically connected with the SCAN scanning line end, the first display module is connected with the first DATA DATA line end, the second display module is connected with the second DATA DATA line end, the third display module is connected with the third DATA DATA line end, and the control module is connected with the VCOM/TP line end;
the first display module, the second display module and the third display module are used for driving the display screen to display and forming a capacitive sensor for identification detection; the control module is used for driving a display screen public electrode signal, driving fingerprint identification and touch detection signals and transmitting fingerprint identification data and touch data;
the common electrode is:
the method comprises the steps of obtaining the display screen common electrode layer through partitioning;
the common electrode is used for:
when driving display, VCOM voltage is obtained through VCOM/TP line so as to drive display together with the pixel electrode;
when fingerprint/touch control is detected, a scanning detection signal is obtained through a VCOM/TP line as a capacitance sensor so as to detect the capacitance change of the display screen;
during fingerprint/touch detection, the pixel electrode sends in a synchronous drive signal through the DATA DATA line so as to ensure that the voltage difference between the pixel electrode and the common electrode is consistent with the voltage difference during display driving.
2. A circuit with full screen recognition and detection function as claimed in claim 1, wherein: 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 line 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 connected with the first DATA DATA line end.
3. A circuit with full screen recognition and detection function as claimed in claim 2, wherein: 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 line 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 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 connected with the second DATA DATA line end through the other end of the common electrode.
4. A circuit with full screen recognition and detection functionality according to claim 3, 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 second transistor is electrically connected with the SCAN scanning line 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 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 a common electrode, and the other end of the seventh capacitor is connected with the third DATA DATA line end.
5. A circuit with full screen recognition and detection function as recited in claim 4, wherein: the control module comprises a fourth transistor and a fourth capacitor, wherein 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, and one end of the fourth capacitor is a common electrode while the other end of the fourth capacitor is electrically connected with the SCAN scanning end.
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| CN201910190372.8A CN109753952B (en) | 2019-03-13 | 2019-03-13 | Circuit with full-screen recognition and detection functions and equipment thereof |
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| CN201910190372.8A CN109753952B (en) | 2019-03-13 | 2019-03-13 | Circuit with full-screen recognition and detection functions and equipment thereof |
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| CN109753952A CN109753952A (en) | 2019-05-14 |
| CN109753952B true CN109753952B (en) | 2023-06-02 |
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| 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 |
| US11308306B2 (en) | 2015-08-19 | 2022-04-19 | Novatek Microelectronics Corp. | Control method for optical fingerprint sensor and related control circuit |
| US11656716B2 (en) | 2015-08-19 | 2023-05-23 | Novatek Microelectronics Corp. | Control method for optical fingerprint sensor and touch controller |
| CN112131911A (en) * | 2019-06-25 | 2020-12-25 | Oppo广东移动通信有限公司 | Display module device, electronic apparatus, and method of assembling display module device |
| CN110286798A (en) * | 2019-06-27 | 2019-09-27 | Oppo广东移动通信有限公司 | Display control method, electronic device, equipment and the storage medium of display screen |
| CN111025697B (en) * | 2019-12-16 | 2021-06-01 | 武汉华星光电技术有限公司 | Liquid crystal display panel and display device |
| CN111696494A (en) * | 2020-07-02 | 2020-09-22 | Tcl华星光电技术有限公司 | Display panel and display device |
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| CN204679996U (en) * | 2015-06-18 | 2015-09-30 | 京东方科技集团股份有限公司 | A kind of array base palte and display panel, display device |
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