CN114092977A - Fingerprint sensing method, display driving fingerprint identification circuit and action device - Google Patents
Fingerprint sensing method, display driving fingerprint identification circuit and action device Download PDFInfo
- Publication number
- CN114092977A CN114092977A CN202010759041.4A CN202010759041A CN114092977A CN 114092977 A CN114092977 A CN 114092977A CN 202010759041 A CN202010759041 A CN 202010759041A CN 114092977 A CN114092977 A CN 114092977A
- Authority
- CN
- China
- Prior art keywords
- fingerprint
- driving
- display panel
- circuit
- embedded
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Liquid Crystal Display Device Control (AREA)
- Image Input (AREA)
Abstract
The invention provides a fingerprint sensing method, a display driving fingerprint identification circuit and a mobile device using the same. The fingerprint sensing method is suitable for an embedded fingerprint display panel with an optical reading array, and comprises the following steps: providing a driving polarity state of the embedded fingerprint display panel to a fingerprint reading circuit within a frame time; capturing a fingerprint image; and correcting the captured fingerprint image data according to the driving polarity state of the embedded fingerprint display panel.
Description
Technical Field
The present invention relates to a fingerprint identification technology, and more particularly, to a fingerprint sensing method of an embedded fingerprint display panel, a display driving fingerprint identification circuit, and a mobile device using the same.
Background
The fingerprint identification technology is a biological identification technology, and the fingerprint identification system is a pattern identification system comprising fingerprint image acquisition, processing, feature extraction and comparison modules. The system is often used in places requiring personnel identification confirmation, such as an access control system, an attendance system, a notebook computer, a mobile device, bank internal processing, bank payment and the like. Currently, the optical fingerprint recognition applied to mobile devices is classified into a button type and an on-screen type. The button-type fingerprint recognition device is generally disposed at a power-on button or a HOME button of the mobile device, and the under-screen fingerprint recognition device is generally disposed at a specific position below the oled panel.
However, the liquid crystal display panel is still a display device which is mainly used in mobile devices, but the liquid crystal display panel is difficult to arrange in the liquid crystal display panel due to the structural problem of the liquid crystal display panel.
Disclosure of Invention
The present invention provides a fingerprint sensing method for an embedded fingerprint display panel, a display driving fingerprint identification circuit and a mobile device using the same, which are used for correctly identifying a fingerprint when a finger is placed on the embedded fingerprint display panel.
In view of the above, the present invention provides a fingerprint sensing method for an embedded fingerprint display panel, wherein the embedded fingerprint display panel includes an optical readout array, the fingerprint sensing method includes: providing a driving polarity state of the embedded fingerprint display panel to a fingerprint reading circuit within a frame time; capturing a fingerprint image; and correcting the captured fingerprint image data according to the driving polarity state of the embedded fingerprint display panel.
The invention further provides a display driving fingerprint identification circuit, which is suitable for an embedded fingerprint display panel, wherein the embedded fingerprint display panel comprises an optical reading array, and the display driving fingerprint identification circuit comprises a display driving circuit and a fingerprint reading circuit. The display driving circuit is coupled with the embedded fingerprint display panel and drives the embedded fingerprint display panel according to display data. The fingerprint reading circuit is coupled with the optical reading array and the display driving circuit of the embedded fingerprint display panel. The display driving circuit provides a driving polarity state of the embedded fingerprint display panel to the fingerprint reading circuit within a frame time. The fingerprint reading circuit captures a fingerprint image through the optical reading array, and then corrects the captured fingerprint image data according to the driving polarity state of the embedded fingerprint display panel.
The invention further provides a mobile device, which comprises an embedded fingerprint display panel and a display driving fingerprint identification circuit. The embedded fingerprint display panel comprises an optical reading array. The display driving fingerprint identification circuit comprises a display driving circuit and a fingerprint reading circuit. The display driving circuit is coupled with the embedded fingerprint display panel and drives the embedded fingerprint display panel according to display data. The fingerprint reading circuit is coupled with the optical reading array and the display driving circuit of the embedded fingerprint display panel. The display driving circuit provides a driving polarity state of the embedded fingerprint display panel to the fingerprint reading circuit within a frame time. The fingerprint reading circuit captures a fingerprint image through the optical reading array, and then corrects the captured fingerprint image data according to the driving polarity state of the embedded fingerprint display panel.
According to the fingerprint sensing method, the display driving fingerprint identification circuit and the mobile device using the same of the embedded fingerprint display panel of the preferred embodiment of the invention, the driving method of the pixels of the embedded fingerprint display panel comprises positive polarity driving and negative polarity driving, so as to avoid or eliminate image sticking (image sticking) of the panel.
According to the fingerprint sensing method, the display driving fingerprint identification circuit and the mobile device using the same of the embedded fingerprint display panel in the preferred embodiment of the invention, the display driving fingerprint identification circuit further comprises a touch sensing circuit for detecting a touch position, wherein when fingerprint identification is carried out, a finger placement position is detected so as to drive the optical reading array to read the finger fingerprint of the position. In a preferred embodiment, the embedded fingerprint display driving circuit reduces the frame rate of the embedded fingerprint display panel before fingerprint identification. In a preferred embodiment, the image data of the fingerprint is adjusted according to a plurality of times of fingerprint acquisitions and corresponding driving polarity states.
The fingerprint display panel is characterized in that a fingerprint reading circuit obtains the current driven polarity state of each pixel before fingerprint images are captured, and therefore, after the fingerprints are captured, back-end image processing can be carried out aiming at the interference caused by the polarity, and the fingerprint identification rate is greatly improved.
In order to make the aforementioned and other objects, features and advantages of the invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
Fig. 1 is a schematic diagram illustrating an integrated module of an optical fingerprint and a liquid crystal display panel according to a preferred embodiment of the invention.
FIG. 2 is a schematic diagram of a liquid crystal driving method.
Fig. 3 is a schematic diagram of a mobile device according to a preferred embodiment of the invention.
FIG. 4A is a block diagram of a display driver fingerprint identification circuit according to a preferred embodiment of the invention.
FIG. 4B is a block diagram of a display driver fingerprint identification circuit according to a preferred embodiment of the invention.
FIG. 4C is a block diagram of a display driver fingerprint identification circuit according to a preferred embodiment of the invention.
Fig. 5 is a flowchart illustrating a fingerprint sensing method of a liquid crystal display panel according to a preferred embodiment of the invention.
Fig. 6 is a timing diagram illustrating an operation of the fingerprint sensing method of the lcd panel according to a preferred embodiment of the invention.
Description of the symbols:
CF: color filter substrate
A TFT: thin film transistor array (TFT array)
300: liquid crystal display panel
301: display driving fingerprint identification circuit
401: liquid crystal display driving circuit
402: fingerprint reading circuit
403: touch sensing circuit
S501 to S506: in a preferred embodiment of the present invention, the fingerprint sensing method of the liquid crystal display panel comprises steps
FP: during fingerprint recognition
TP: during touch sensing
Detailed Description
Fig. 1 is a schematic diagram illustrating an integrated module of an optical fingerprint and a liquid crystal display panel according to a preferred embodiment of the invention. In this embodiment, the panel integrating the optical fingerprint and the liquid crystal display panel may also be an embedded fingerprint display panel. Referring to fig. 1, the lcd panel is composed of two transparent substrates (glass substrates) above and below. The upper substrate is a color filter (color filter) substrate, which includes red, green, blue (RGB) color resistors, a black matrix (black matrix), and the like. The lower substrate is mainly a thin film transistor array (TFT array) including a metal layer, an Indium Tin Oxide (ITO) transparent electrode, a semiconductor layer (silicon), an insulating layer (SiOx, OC …), and the like. In the embodiment of fig. 1, the upper substrate is denoted as CF, the lower substrate is denoted as TFT, and a liquid crystal layer LC is disposed between the upper and lower substrates. In this embodiment, the image sensor FP sensor for capturing a fingerprint may be fabricated by, for example, using materials and processes of thin film transistors to fabricate optical sensing elements (e.g., p-i-n diode, p-n diode, TFT, mim.) so that the image sensor FP sensor for capturing a fingerprint and the liquid crystal layer LC can be fabricated on the TFT array substrate at the same time. Also, in the case of the optical sensor element of the TFT, it can be fabricated together with the pixel switch TFT. In another preferred embodiment, the image sensor FP sensor of the fingerprint can also be fabricated on the color filter substrate, but the number of additional process steps is required, but the invention does not limit the location of the image sensor FP sensor. In this embodiment, when a finger touches the surface of the panel to perform fingerprint recognition, for example, the light reflected by the backlight module is used to reflect and illuminate the finger to capture the light reflected by the finger fingerprint.
FIG. 2 is a schematic diagram of a liquid crystal driving method. Referring to fig. 2, a "+" symbol in the drawing indicates that the voltage of the pixel electrode (pixel electrode) is higher than the voltage of the common electrode (Vcom electrode), and a "-" symbol indicates that the voltage of the pixel electrode is lower than the voltage of the common electrode. In fig. 2, there are four types of inversion methods, which are a Frame inversion (Frame inversion), a Line inversion (Line inversion), a Column inversion (Column inversion), and a dot inversion (Pixel inversion). Such a driving method is mainly because a so-called image sticking (image sticking) occurs due to accumulation of electric charges after the liquid crystal display panel is operated for a long time. In any inversion (inversion) method, the polarity of the pixel electrode of each pixel is switched with respect to the polarity of the common electrode in the adjacent frame. However, the switching of the positive and negative polarities of the pixel electrodes not only changes the arrangement of the liquid crystal, but also directly changes the amount of light transmission for fingerprint recognition, which further causes the instability of the signal read by the image sensor of the fingerprint, and affects the fingerprint recognition.
To solve the above problems, in the following embodiments of the present invention, a mobile device with an on-panel fingerprint recognition function is provided, and fig. 3 is a schematic diagram of the mobile device according to a preferred embodiment of the present invention. Referring to fig. 3, the mobile device includes a liquid crystal display panel 300 and a display driving fingerprint identification circuit 301. The LCD panel 300 includes an optical reading array for reading fingerprints as described in the above embodiments.
FIG. 4A is a block diagram of a display driver fingerprint identification circuit 301 according to a preferred embodiment of the present invention. Referring to fig. 4A, the display driving fingerprint identification circuit 301 includes a liquid crystal display driving circuit 401, a fingerprint reading circuit 402, and a touch sensing circuit 403. The lcd driving circuit 401 is coupled to the fingerprint reading circuit 402 and the lcd panel 300, and drives the lcd panel according to a display data. The fingerprint reading circuit 402 is coupled to the optical reading array of the liquid crystal display panel 300 and the liquid crystal display driving circuit 401. The touch sensing circuit 403 is coupled to the liquid crystal display driving circuit 401 and the touch electrodes of the liquid crystal display panel 300, and is used for detecting a touch position of a sensible object such as a finger or a stylus. In one embodiment, the display driving fingerprint identification circuit 301 may also include a liquid crystal display driving circuit 401 and a fingerprint reading circuit 402.
In another embodiment, the fingerprint reading circuit 402 may also be coupled to the touch sensing circuit 403, as shown in fig. 4B, so that the touch sensing circuit 403 and the fingerprint reading circuit 402 can directly communicate with each other. For example, when the touch sensing circuit 403 detects a finger touch position, the fingerprint reading circuit 402 may be notified to perform fingerprint recognition.
Furthermore, in another embodiment, the display driving circuit 401 may first provide the driving method to the touch sensing circuit 403, and then the touch sensing circuit 403 notifies the fingerprint reading circuit 402 of the display status. As shown in fig. 4C. When fingerprint identification is to be performed, the display driving circuit 401 notifies the driving polarity state to the touch sensing circuit 403, the touch sensing circuit 403 sends the driving polarity state and the finger position to the fingerprint reading circuit 402, and the fingerprint reading circuit 402 can perform fingerprint identification directly and correct the fingerprint reading result.
Fig. 5 is a flowchart illustrating a fingerprint sensing method of a liquid crystal display panel according to a preferred embodiment of the invention. Referring to fig. 4 and 5, the fingerprint sensing method of the liquid crystal display panel includes the following steps:
step S501: and starting.
Step S502: and judging whether to read the fingerprint data. In a mobile device, such as a mobile phone, fingerprint unlocking is required when the mobile device is turned on, and a Host (Host) in the mobile phone notifies the display driver fingerprint identification circuit 301 to read fingerprint data.
Step S503: the touch sensing circuit 403 of the display driving fingerprint identification circuit 301 detects the position of the finger touch, and defines or determines the image capturing range of the fingerprint identification accordingly. In this embodiment, it is assumed that the optical pick-up array included in the lcd panel 300 is distributed over the entire panel, i.e., any position on the entire screen can be used for fingerprint recognition. However, in another embodiment of the present invention, if only a portion of the lcd panel 300 has the optical pick-up array, the step S503 is not necessary, and the designer may choose to omit this step.
Step S504: the display driver fingerprint identification circuit 301 reduces the display data update frequency. Referring to fig. 6, fig. 6 is a timing diagram illustrating an operation of the fingerprint sensing method of the liquid crystal display panel according to a preferred embodiment of the invention. As shown in fig. 6, FP is fingerprint recognition and TP is touch sensing. In this embodiment, when entering the fingerprint recognition, the original 60Hz frame rate is modified to 30Hz frame rate, and the touch sensing is turned off to avoid signal interference. However, in another embodiment of the invention, the touch sensing does not necessarily need to be turned off, so turning off the touch sensing is not necessary, and the invention is not limited thereto.
Step S505: and performing fingerprint image acquisition for multiple times, and correcting according to the polarity of the driving. As shown in fig. 6, the display driving fingerprint identification circuit 301 performs display data update and fingerprint scanning, for example, in a time-sharing manner. During the period of fingerprint identification FP, the liquid crystal display drive circuit 401 notifies the fingerprint reading circuit 402 of the drive polarity state of the frame. The fingerprint reading circuit 402 adjusts and corrects the data of the fingerprint image according to the driving polarity state. In practical applications, due to the different polarities of the pixel driving voltages, the light transmittance is also different, which causes the noise of fingerprint identification to be changed. For example, in the Column inversion (Column inversion) of fig. 2, there may be a case where the captured fingerprint image has uneven brightness similar to a straight line, resulting in straight line noise, or a case where the background value of the fingerprint is different. In the embodiment of the present invention, since the liquid crystal display driving circuit 401 provides the driving polarity mode of the fingerprint reading circuit 402 during the fingerprint capturing and identification, the fingerprint reading circuit 402 can correct the fingerprint image according to the driving polarity after reading the fingerprint image.
The driving polarity provided by the liquid crystal display driving circuit 401 is, for example, the positive and negative polarities indicated in fig. 2, that is, the positive and negative polarities of each pixel are informed. In another preferred embodiment of the present invention, the driving polarity provided by the liquid crystal driving circuit 401 may be only to inform the frame inversion method of the current liquid crystal driving, or directly provide the voltage data of each pixel, or provide the frame as an odd frame or an even frame. Therefore, the present invention does not limit the data content of the driving polarity state, and it is within the scope of the present invention that the fingerprint reading circuit 402 can obtain the polarity data of the current liquid crystal driving.
In addition, in step S505, for example, multiple fingerprint image acquisitions are performed, for example, after comparing the multiple acquired fingerprint identification data, one fingerprint image is selected for compensation and correction. Or, all or part of the fingerprint identification data acquired for many times is processed by image processing, and compensation and correction of the fingerprint image are performed by using the driving polarity state. Therefore, the present invention does not limit the number of times of capturing fingerprint images and the manner of image processing, and it is within the scope of the present invention to adjust the image data by driving the data in the polarity state.
Step S506: and returning the adjusted fingerprint image data to the host. After finishing the fingerprint image correction, the display driving fingerprint identification circuit 301 returns the adjusted fingerprint image data to the host side to complete fingerprint sensing. The host end determines whether to unlock the mobile device according to the adjusted fingerprint image data.
In the step S503, the image capturing range of the fingerprint recognition is determined according to the sensed touch position. In another preferred embodiment of the present invention, the image capturing range of the fingerprint recognition can be determined by other methods such as default of the operating system or default of the program, so that it can be understood by those skilled in the art that the display driving fingerprint recognition circuit 301 can also determine the image capturing range of the fingerprint according to the application time of the fingerprint recognition.
In the above embodiment, the liquid crystal display driving circuit 401 notifies the fingerprint reading circuit 402 of the driving polarity state of the frame, for example, during the period of fingerprint identification FP. However, in another preferred embodiment of the present invention, the fingerprint reading circuit 402 may pre-issue a request to the LCD driver circuit 401 to inform the LCD driver circuit 401 that the polarity state is required to be driven. Then, the data of the driving polarity state of the frame is supplied to the fingerprint reading circuit 402 again to the fingerprint reading circuit 402. The present invention does not limit the time for providing the driving polarity state. In addition, although the display module in the embodiment of the invention is described with reference to a liquid crystal display panel, it should be understood that the display module in the in-cell fingerprint display panel of the invention is not limited to the liquid crystal display panel structure, and may be other display modules, such as an Organic Light Emitting Diode (OLED).
In summary, the spirit of the present invention lies in that before capturing a fingerprint image, the fingerprint reading circuit obtains the current driven polarity state of each pixel, so that after capturing the fingerprint, the fingerprint reading circuit can perform the back-end image processing to the interference caused by the polarity, thereby greatly improving the fingerprint identification rate. Furthermore, the present invention can integrate the fingerprint recognition circuit and the display circuit, or integrate the fingerprint recognition circuit, the display circuit and the touch circuit, and thus can be also called an integrated circuit or an integrated fingerprint display panel.
The detailed description of the preferred embodiments is provided only for the convenience of illustrating the technical contents of the present invention, and the present invention is not limited to the above-described embodiments in a narrow sense, and various modifications made without departing from the spirit of the present invention and the scope of the following claims are included in the scope of the present invention. Therefore, the protection scope of the present invention should be determined by the appended claims.
Claims (18)
1. A fingerprint sensing method is suitable for an embedded fingerprint display panel, wherein the embedded fingerprint display panel comprises an optical reading array, and the fingerprint sensing method is characterized by comprising the following steps:
providing a driving polarity state of the embedded fingerprint display panel to a fingerprint reading circuit within a frame time;
capturing a fingerprint image; and
and correcting the captured fingerprint image data according to the driving polarity state of the embedded fingerprint display panel.
2. The fingerprint sensing method according to claim 1, wherein the pixels of the embedded fingerprint display panel are driven in a positive polarity driving manner and a negative polarity driving manner, so as to eliminate image sticking of the panel.
3. The fingerprint sensing method according to claim 1, further comprising, before capturing the fingerprint image:
and determining the position for capturing the fingerprint image according to a touch position.
4. The fingerprint sensing method according to claim 1, further comprising:
before fingerprint identification, the frame update rate of the embedded fingerprint display panel is reduced.
5. The fingerprint sensing method according to claim 1, further comprising:
before fingerprint identification, a display driving circuit is required to provide the driving polarity state of the embedded fingerprint display panel.
6. The fingerprint sensing method according to claim 1, further comprising:
and adjusting the image data of the fingerprint according to the fingerprint acquisition for multiple times and the corresponding driving polarity state.
7. The utility model provides a show drive fingerprint identification circuit, is applicable to an embedded fingerprint display panel, its characterized in that, this embedded fingerprint display panel includes an optics and reads the array, this shows drive fingerprint identification circuit and includes:
a display driving circuit coupled to the embedded fingerprint display panel for driving the embedded fingerprint display panel according to a display data;
a fingerprint reading circuit coupled to the optical reading array of the embedded fingerprint display panel and the display driving circuit,
in a frame time, the display driving circuit provides a driving polarity state of the embedded fingerprint display panel to the fingerprint reading circuit;
the fingerprint reading circuit captures a fingerprint image through the optical reading array, and then corrects the captured fingerprint image data according to the driving polarity state of the embedded fingerprint display panel.
8. The display driving fingerprint identification circuit of claim 7 wherein the pixels of the embedded fingerprint display panel are driven in positive and negative polarity driving modes, wherein the driving modes are alternately positive and negative to eliminate image sticking of the panel.
9. The display driver fingerprint recognition circuit of claim 7, further comprising:
a touch sensing circuit for detecting a touch position,
when fingerprint identification is carried out, the fingerprint reading circuit determines the position of fingerprint image capture according to the touch position.
10. The display driving fingerprint identification circuit of claim 7, wherein the embedded fingerprint display driving circuit reduces a frame rate of the embedded fingerprint display panel before performing fingerprint identification.
11. The display driving fingerprint recognition circuit of claim 7, wherein the display driving circuit is required to provide the driving polarity state of the embedded fingerprint display panel before fingerprint recognition.
12. The display driver fingerprint identification circuit of claim 7 wherein the image data of the fingerprint is adjusted based on a plurality of fingerprint acquisitions and their corresponding driving polarity states.
13. A mobile device, comprising:
an embedded fingerprint display panel including an optical read array; and
a display driver fingerprint identification circuit, comprising:
a display driving circuit coupled to the embedded fingerprint display panel for driving the embedded fingerprint display panel according to a display data;
a fingerprint reading circuit coupled to the optical reading array of the embedded fingerprint display panel and the display driving circuit,
providing a driving polarity state of the embedded fingerprint display panel to the fingerprint reading circuit within a frame time;
the fingerprint reading circuit captures a fingerprint image through the optical reading array, and then corrects the captured fingerprint image data according to the driving polarity state of the embedded fingerprint display panel.
14. The mobile device of claim 13, wherein the pixels of the embedded fingerprint display panel are driven in positive and negative polarity driving modes, wherein the driving modes are alternately positive and negative driving modes to eliminate image sticking of the panel.
15. The mobile device of claim 13, further comprising:
a touch sensing circuit for detecting a touch position,
when fingerprint identification is carried out, the fingerprint reading circuit determines the position of fingerprint image capture according to the touch position.
16. The mobile device of claim 13, wherein the display driver circuit reduces a frame rate of the embedded fingerprint display panel before performing fingerprint recognition.
17. The mobile device of claim 13, wherein the display driver circuit is required to provide the driving polarity status of the embedded fingerprint display panel before fingerprint recognition.
18. The mobile device of claim 13, wherein the image data of the fingerprint is adjusted according to a plurality of fingerprint acquisitions and corresponding driving polarity states thereof.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010759041.4A CN114092977A (en) | 2020-07-31 | 2020-07-31 | Fingerprint sensing method, display driving fingerprint identification circuit and action device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010759041.4A CN114092977A (en) | 2020-07-31 | 2020-07-31 | Fingerprint sensing method, display driving fingerprint identification circuit and action device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114092977A true CN114092977A (en) | 2022-02-25 |
Family
ID=80295084
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010759041.4A Pending CN114092977A (en) | 2020-07-31 | 2020-07-31 | Fingerprint sensing method, display driving fingerprint identification circuit and action device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114092977A (en) |
-
2020
- 2020-07-31 CN CN202010759041.4A patent/CN114092977A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10055054B2 (en) | Touch device with adjustable grid distance | |
| TWI438692B (en) | Display device including sensing elements | |
| JP4787213B2 (en) | Display device having multi-touch recognition function | |
| US8963852B2 (en) | Touch panel, driving method for the touch panel, program for getting touch information, and memory media | |
| US7936340B2 (en) | Display device and sensing signal processing apparatus | |
| US9395835B2 (en) | Liquid crystal display panel having integrated pressure sensing units | |
| US7777727B2 (en) | Touch detectable display device | |
| US8319750B2 (en) | Sensing circuit, method of driving sensing circuit, display device, method of driving display device, and electronic apparatus | |
| US9599848B2 (en) | Display device including compensation capacitors with different capacitance values | |
| US20090073141A1 (en) | Electro-optical device, electronic apparatus and method of detecting indicating object | |
| US20120013595A1 (en) | Display device and method of operation thereof | |
| KR20120024525A (en) | Touch sensor, display and electronic device | |
| US8581863B2 (en) | Liquid crystal display panel and liquid crystal display apparatus | |
| US20100001970A1 (en) | Active matrix display apparatus with touch sensing function | |
| EP2339830A2 (en) | Display device, semiconductor device and driving method thereof | |
| KR101633601B1 (en) | Liquid crystal display panel with a built-in touch screen, and liquid crystal display device having the same | |
| US9645639B2 (en) | Apparatus and method for driving touch sensor | |
| KR20130033641A (en) | Touch sensor integrated type display | |
| CN114092977A (en) | Fingerprint sensing method, display driving fingerprint identification circuit and action device | |
| KR101825686B1 (en) | Liquid crystal display device with a built-in touch screen | |
| TWI758801B (en) | Fingerprint identification method for in-display fingerprint display device and fingerprint identification and display driver integrated circuit and mobile device using the same | |
| KR101451587B1 (en) | Infrared Sensor Module, Touch Sensing Method Using the Same and Auto Calibration Method | |
| KR101509764B1 (en) | Liquid crystal display device | |
| CN116363709A (en) | Under-screen fingerprint sensing device and control method thereof | |
| KR20070062692A (en) | Display device and manufacturing method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |