CN111258096A - Fingerprint identification display panel, fingerprint identification method and display device - Google Patents
Fingerprint identification display panel, fingerprint identification method and display device Download PDFInfo
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- CN111258096A CN111258096A CN202010097506.4A CN202010097506A CN111258096A CN 111258096 A CN111258096 A CN 111258096A CN 202010097506 A CN202010097506 A CN 202010097506A CN 111258096 A CN111258096 A CN 111258096A
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/13338—Input devices, e.g. touch panels
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/133509—Filters, e.g. light shielding masks
- G02F1/133512—Light shielding layers, e.g. black matrix
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
- G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
- G06V40/12—Fingerprints or palmprints
- G06V40/13—Sensors therefor
- G06V40/1318—Sensors therefor using electro-optical elements or layers, e.g. electroluminescent sensing
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- Optics & Photonics (AREA)
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Abstract
The application discloses a fingerprint identification display panel, a fingerprint identification method and a display device, wherein the fingerprint identification display panel comprises a backlight source, a first polaroid, an array substrate, a liquid crystal layer, a color film substrate, a second polaroid and a protective layer which are sequentially arranged in a stacked mode, a black matrix is arranged on one side, facing the array substrate, of the color film substrate, an optical sensor layer is arranged on one side, away from the color film substrate, of the array substrate, the optical sensor layer comprises a plurality of optical sensors, the optical sensors and the black matrix are arranged in an aligned mode in the stacking direction, and the liquid crystal layer at partial pixel positions forms a dot pattern which is used for forming a point light source. The technical structure of the scheme is simple, and the recognition precision and accuracy are high.
Description
Technical Field
The present application relates to the field of display technologies, and in particular, to a fingerprint identification display panel, a fingerprint identification method, and a display device.
Background
With the progress of modern society, the importance of personal identification and personal information security has gradually received attention. Because human fingerprints have uniqueness and invariance, the fingerprint identification technology has the characteristics of good safety, high reliability and simple and convenient use, so the fingerprint identification technology is widely applied to various fields for protecting personal information safety, including the display field, especially the field of electronic equipment with a display function, such as mobile phones, notebook computers, tablet computers, digital cameras and the like. The method has important significance for enhancing the safety of the electronic equipment, expanding the application range of the electronic equipment and the like. Especially for mobile consumption, electronic fingerprint recognition is an indispensable part of mobile phones.
The main technology of fingerprint identification is a collimated light path or pinhole technology, an image formed on a sensor by lighting a point light source is shown in fig. 1, the image has two areas, one area is a non-imaging area WX, the fingerprint is not imaged in the area, the other part is an imaging area TX, and the fingerprint can be imaged in the area. As shown in fig. 2, the non-imaging area formed by the point light sources can be complemented by two point light sources spaced a certain distance apart, so as to improve the accuracy and recognition rate of fingerprint recognition.
However, the current fingerprint identification technology is mainly studied on the technology of the fingerprint under the OLED screen, and for a Liquid Crystal Display (LCD), since a backlight non-self-luminous device is adopted and the liquid crystal display has a requirement on the aperture ratio, components cannot be added at will to avoid reducing the aperture ratio, so that the fingerprint identification under the LCD screen is not broken through all the time.
Disclosure of Invention
In view of the above-mentioned defects or deficiencies of the liquid crystal display technology in the prior art, the application provides a fingerprint identification display panel, which comprises a backlight source, a first polarizer, an array substrate, a liquid crystal layer, a color film substrate, a second polarizer and a protective layer, wherein the backlight source, the first polarizer, the array substrate, the liquid crystal layer, the color film substrate, the second polarizer and the protective layer are sequentially arranged in a stacked manner, and the fingerprint identification: the liquid crystal display panel comprises a color film substrate, wherein a black matrix is arranged on one side of the color film substrate, which faces to the array substrate, an optical sensor layer is arranged on one side of the array substrate, which is far away from the color film substrate, the optical sensor layer comprises a plurality of optical sensors, the optical sensors and the black matrix are arranged in the stacking direction, and a liquid crystal layer at part of pixel positions forms a dot pattern for forming a point light source.
Further, the surface of the light sensor in the direction perpendicular to the stacking direction is L-shaped, wherein two sides of the L-shape extend in parallel along two adjacent sides of the frame of the black matrix, respectively.
Further, the optical sensor and the corresponding detection circuit are arranged on the array substrate.
Further, the optical sensor layer further comprises an optical sensing substrate, and the optical sensor and the corresponding detection circuit are arranged on the optical sensing substrate.
Furthermore, the electrode of the light sensor close to the backlight source is made of light-shielding metal, and the electrode far away from the backlight source is made of transparent metal.
Further, the light sensor is a PIN photosensitive device, a PN photosensitive device or a Schottky photosensitive device.
Further, the detection circuit includes: the data reading circuit comprises a data reading signal line and a thin film transistor, wherein the grid electrode of the thin film transistor is electrically connected with a control signal line of a driving circuit, the first pole of the thin film transistor is connected with the first electrode of the light sensor, and the second pole of the thin film transistor is connected with the data reading signal line.
The application also provides a fingerprint identification method which is realized by using the fingerprint identification display panel in any scheme.
Furthermore, the backlight emitted by the backlight source passes through the first polarizing plate, the dot pattern and the second polarizing plate to form a point light source.
The application also provides a display device which comprises the fingerprint identification display panel in any one of the above schemes.
By adopting the scheme of the application, the point light source is formed by the point patterns formed by the two polarizing plates and the liquid crystal layer in the backlight mode, an independent point light source does not need to be arranged, the structure is simpler and more convenient, and the position of the point light source can be flexibly adjusted.
And the optical sensor is arranged on one surface of the array substrate, which is far away from the color film substrate, and the black matrix is opposite to the color film substrate, so that the influence of the optical sensor on the illumination of the liquid crystal due to the blocking of the backlight is avoided.
In addition, the distance between the optical sensor and the black matrix at least exceeds the thickness of the array substrate and the liquid crystal layer, so that light reflected by valleys and ridges of the fingerprint is not easily shielded by the black matrix, and the detection accuracy is improved. And because of the distance, light with a large angle is not needed to be transmitted, and the black matrix is not needed to be narrowed.
Finally, light sensor sets up in first polaroid principle backlight one side for the light of fingerprint reflection reachs light sensor before passing first polaroid, has avoided the reverberation to be by the filtering of first polaroid, has improved the identification effect.
The L-shaped light sensor is designed in shape, and compared with the arrangement in the direction of one edge, the problem that an adjacent black matrix blocks a local area and cannot form images is solved.
Drawings
Other features, objects and advantages of the present application will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, made with reference to the accompanying drawings in which:
FIG. 1 is a schematic diagram of an image formed by a point light source on an optical image sensor array;
FIG. 2 is an image diagram of two point light sources emitting light beams simultaneously;
fig. 3 is a schematic structural diagram of a display panel according to embodiment 1 of the present application;
FIG. 4 is a schematic diagram of the relationship between the photo sensor and the black matrix;
FIG. 5 is a detection circuit diagram;
FIG. 6 is a schematic diagram of a PIN photovoltaic device coupled to a transistor;
fig. 7 is a schematic structural diagram of a display panel in embodiment 2 of the present application.
In the figure: 100 array substrate; 200 color film substrates; 201 a black matrix; 300 a liquid crystal layer; 301 dot pattern; 400 a light sensor layer; 401a light sensor; 402 a light sensor substrate; 500 a first polarizing plate; 600 backlight source; 700 a second polarizer; 800 a protective layer; 900 point light sources; 1000 fingerprint.
Detailed Description
The present application will be described in further detail with reference to the following drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and not restrictive of the invention. It should be noted that, for convenience of description, only the portions related to the present invention are shown in the drawings.
As used in this application, the terms "first," "second," and the like do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element preceding the word covers the element listed after the word, and does not exclude the possibility that other elements are also covered. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.
Fig. 3 shows a fingerprint identification display panel of the present application, including:
a liquid crystal cell formed by cell-aligning an array substrate (array glass)100 and a color filter substrate (color filter) 200;
a liquid crystal layer (liquid crystal)300 located inside the liquid crystal cell;
a light sensor (light sensor) layer 400 located on a side of the array substrate 100 away from the color filter substrate 200;
a first polarizing plate (Polarizer)500 positioned at a side of the photosensor layer 400 facing away from the array substrate 100;
a backlight (back light)600 positioned on a side of the first polarizing plate 500 facing away from the photosensor layer 400;
a second polarizing plate (Polarizer)700 disposed on a side of the color filter substrate 200 away from the array substrate 100;
and a protective layer (cover)800 positioned on the side of the second polarizing plate 700 away from the color film substrate 200.
A black matrix (black matrix)201 is disposed on one side of the color film substrate 200 facing the array substrate 100.
The liquid crystal layer 300 at partial pixel positions forms a dot pattern 301 for forming a point light source, wherein the positions and the number of pixels corresponding to the dot pattern are set according to actual requirements. Specifically, the backlight source 600 emits a backlight that passes through the first polarizing plate 500, the dot pattern 301 of the liquid crystal layer 300, and the second polarizing plate 700 to form a point light source 900.
Light of the point light source 900 passes through the protective layer 800, reaches the fingerprint 1000 of the finger, and is emitted, the brightness of light reflected by the valleys and the ridges of the fingerprint 100 is different, and the reflected light passes through the protective layer 800, the second polarizing plate 700, the liquid crystal cell, and reaches the photosensor layer 400 on the other side of the array substrate 100.
Wherein the light sensor layer 400 comprises a plurality of light sensors 401 for receiving light reflected by the valleys and ridges of said fingerprint 1000 and forming corresponding electrical signals. The plurality of photosensors 401 are provided to face the black matrix 201 in the stacking direction of the respective layers. Due to the imaging principle of the point light source, the photoelectric sensor receives the large-angle fingerprint reflected light (the included angle between the photoelectric sensor and the normal direction of the touch surface of the finger is about 41-70 degrees), so that the detection of the fingerprint reflected light cannot be influenced by the arrangement of the optical sensor 401 opposite to the black matrix 201.
By adopting the scheme, the point light source is formed by the point pattern 301 formed by the backlight through the two polarizing plates and the liquid crystal layer, no independent point light source is required to be arranged, the structure is simpler and more convenient, and the position of the point light source can be flexibly adjusted. In addition, the optical sensor 401 is arranged on the surface of the array substrate 100 far away from the color film substrate 200, and the black matrix 201 is opposite to the surface, so that the influence of the optical sensor 401 on the illumination of the liquid crystal due to the blocking of backlight is avoided, in addition, the distance between the optical sensor 401 and the black matrix 201 at least exceeds the thickness of the array substrate 100 and the thickness of the liquid crystal layer 300, so that the light reflected by the valleys and the ridges of the fingerprint 1000 is not easily shielded by the black matrix 201, and the detection accuracy is improved. And because of the distance, light with a large angle is not needed to be transmitted, and the black matrix is not needed to be narrowed.
Preferably, the matrix material of the array substrate, the protective layer and the light sensor substrate is transparent glass.
Preferably, as shown in fig. 4, the surface of the photosensor 401 perpendicular to the stacking direction is L-shaped, and two sides of the L-shape extend in parallel along two adjacent sides of the frame of the black matrix 201. The light sensor 401 is arranged in an L shape, which has the advantage that other adjacent black matrixes cannot form an image in a local area shielded by the black matrixes due to the arrangement in the direction of one side.
Preferably, the photosensor layer 400 further includes a photosensor substrate 402, the plurality of sensors 401 are disposed on the photosensor substrate 402, and a detection circuit is disposed on the photosensor substrate 402.
In another preferred embodiment, the light sensor layer 400 is disposed on the array substrate 100, and the detection circuit is also disposed on the array substrate 100.
Preferably, the electrode on the side of the light sensor close to the backlight source is made of light-shielding metal, the electrode on the side far from the backlight source is made of transparent metal, so that the light reflected by the finger enters the light sensor to generate a current, and the cathode is made of light-shielding metal, so as to prevent the backlight emitted by the backlight source 600 from interfering with the light sensor.
Specifically, when the plurality of sensors 401 are disposed on the photosensor substrate 402, the anode 401D is a transparent metal, and the cathode 40E is a light-shielding metal.
Specifically, when the plurality of sensors 401 are disposed on the array substrate 100, the anode 401D is a light-shielding metal, and the cathode 40E is a transparent metal.
Preferably, a partial view of a detection circuit is shown in fig. 5 (in the figure, the photosensor 401 is exemplified by a PIN-type photosensor), said detection circuit comprising: a data reading signal line Readline and a thin film transistor T1 for controlling the switching of the photo sensor PIN, wherein the Gate of the thin film transistor T1 is electrically connected with the control signal lines Gate1/Gate2, the first pole (for example, the source) of the thin film transistor T1 is connected with the first electrode of the photo sensor PIN, the second pole (for example, the drain) of the thin film transistor T1 is connected with the data reading signal line Readline, and the second electrode of the photo sensor PIN is connected with the bias voltage Vbias.
The on-off of the thin film transistor T1 is controlled by the control signal line Gate1, and the photocurrent generated by the first photo-sensor PIN can be read by the data reading signal line Readline. The data reading signal line Readline can read the photocurrent generated by the second photo-sensing device PIN by controlling the on/off of the thin film transistor T1 through the control signal line Gate 2.
Fig. 6 shows a connection diagram of a photosensitive device PIN and a thin film transistor T1, wherein the photosensitive device PIN includes a P-type material region 401A, an intrinsic region 401B, and an N-type material region 401C stacked in this order, a side of the P-type material region 401A remote from the intrinsic region 401B is connected to an anode 401E, a side of the N-type material region 401C remote from the intrinsic region 401B is connected to a cathode 401E, and a cathode 401D is connected to a first pole of T1. The anode 401D is made of transparent metal so that light reflected by a finger enters the PIN structure to generate current, and the cathode 40E is made of light-shielding metal so as to prevent the backlight emitted by the backlight 600 from interfering with the PIN.
Preferably, the photosensor 401 may also select a PN photosensor, a schottky type photosensor, or the like as long as it can perform photoelectric conversion.
The present invention also provides an identification method of a fingerprint identification display panel, wherein the above fingerprint identification display panel is adopted, wherein, a dot pattern 301 is formed on a liquid crystal layer 300 according to the position of a point light source required to be formed.
The backlight emitted from the backlight source 600 passes through the first polarizer 500, the dot pattern 301 of the liquid crystal layer 300, and the second polarizer 700 to form a point light source 900; the light of the point light source 900 passes through the protective layer 800 to reach the finger fingerprint 1000 and is emitted, the brightness of the light reflected by the valleys and ridges of the fingerprint 1000 is different, and the emitted light passes through the protective layer 800, the second polarizing plate 700, the liquid crystal cell and reaches the photo sensor layer 400 on the other side of the array substrate 100.
Preferably, the number of the point light sources 900 is preferably two or more. More preferably, each point source 900 is 5 x 5mm in size.
During operation, the time-sharing lighting mode can be adopted for detection, specifically, one point light source 900 is firstly lighted at the first moment, two point light sources 900 are lighted at the second moment, the detection result of the light sensor 401 is calculated, so that accurate fingerprint detection is realized (the principle of the method is the same as that of the prior art, and the method is not repeated here), and the time-sharing lighting can be realized through the switching of liquid crystal patterns.
The invention also provides a display device which comprises the fingerprint identification display panel, and further comprises a drive circuit of the display panel and the like.
Example 1
Fig. 3 shows a fingerprint identification display panel according to embodiment 1 of the present invention, which includes an array substrate 100 and a color film substrate 200 forming a liquid crystal cell and a liquid crystal layer located in the liquid crystal cell; a black matrix 201 is arranged on one side of the color film substrate 200 facing the array substrate 100;
the array substrate 100 is provided with an optical sensor layer 400, a first polarizing plate 500 and a backlight source 600 which are sequentially arranged away from the color film substrate 200;
and a second polarizing plate 700 and a protective layer 800 are sequentially stacked on the side of the color film substrate 200 away from the array substrate 100.
The photosensor layer 400 includes a photosensor substrate 402, and a plurality of photosensors 401 and detection circuits provided on the photosensor substrate 402. And the position of the photosensor 401 is directly opposite to the position of the black matrix 201 in the stacking direction of the respective layers.
The optical sensor 401 is a PIN photosensor, and its anode is made of transparent metal and its cathode is made of light-shielding metal. The photosensor substrate 402 is a glass substrate.
During the fingerprint recognition operation, the backlight emitted from the backlight source 600 reaches the liquid crystal layer through the first polarizer 500, the photo sensor substrate 402, and the array substrate 100. The cathode of the optical sensor 401 is made of light-shielding metal, so that interference of backlight to the optical sensor 401 is avoided, and the position of the optical sensor 401 is opposite to the position of the black matrix 201 in the laminating direction of each layer, so that the shielding of the cathode to the backlight does not influence the irradiation of the display picture of the liquid crystal layer.
At this time, a dot pattern 301 is formed at a position corresponding to a fingerprint identification area of the liquid crystal layer, a certain range area around the dot pattern is displayed as black or dark, after the dot pattern 301 is irradiated by backlight, light generated by the dot pattern 301 passes through the color film substrate 200 and the second polarizer 700 to form a point light source 900, the light of the point light source 900 passes upwards through the protective layer 900 to reach the finger fingerprint 1000 on the surface, light generated by the valleys and ridges of the fingerprint 1000 is reflected to pass through the protective layer 800, the second polarizer 700, the color film substrate 200, the liquid crystal layer 300 and the array substrate 100 to reach the anode of the optical sensor 401, and passes through the anode made of the transparent metal to enter the PIN structure to generate current.
When the angle theta of the light rays emitted by the point light source 900 relative to the laminating direction is between 41 and 72 degrees, the light rays can reach the fingerprint surface and are received by the optical sensor (when the angle is larger than 72 degrees, full emission occurs, no light rays are emitted to the fingerprint surface, the detection of the fingerprint cannot be realized, and when the angle is smaller than 41 degrees, the intensity of the reflected light rays is too large, the light zone division is low, and the identification effect is also influenced).
At the next moment, one dot pattern 301 (i.e., two dot patterns) is added to the liquid crystal layer 300, and the light emitted from the backlight 600 repeats the above process to form two dot light sources 900, and the light emitted and reflected from the dot light sources 900 is received by the light sensor 401 and generates a current. And accurate identification of the fingerprint is achieved through calculation (the algorithm for detecting the fingerprint by sequentially lighting two point light sources is the prior art in the field, and is not described herein any more).
Example 2:
fig. 7 shows a fingerprint identification display panel according to embodiment 2 of the present invention, which has a structure similar to that of embodiment 1 in most parts and will not be described repeatedly. The difference from embodiment 1 is that the photosensor layer 400 does not include the photosensor substrate 402, but is directly disposed on the side of the array substrate 100 away from the color filter substrate 200, and the detection circuit is also disposed on the array substrate 100.
The cathode of the PIN photosensitive device is close to the surface of the array substrate 100, and the anode is closer to one side of the backlight source 600, at this time, in order to facilitate the PIN material to receive the fingerprint reflected light, the cathode is made of transparent metal, and in order to avoid the interference of the backlight to the PIN material, the anode is made of light-shielding metal.
The working process of fingerprint identification is the same as in example 1.
The above description is only a preferred embodiment of the application and is illustrative of the principles of the technology employed. It will be appreciated by those skilled in the art that the scope of the disclosure herein is not limited to the particular combination of features described above, but also encompasses other arrangements formed by any combination of the above features or their equivalents without departing from the spirit of the disclosure. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.
Claims (10)
1. The utility model provides a fingerprint identification display panel, includes the backlight, first polaroid, array substrate, liquid crystal layer, various membrane base plate, second polaroid and the protective layer that stack gradually and arrange, its characterized in that: the liquid crystal display panel comprises a color film substrate, wherein a black matrix is arranged on one side of the color film substrate, which faces to the array substrate, an optical sensor layer is arranged on one side of the array substrate, which is far away from the color film substrate, the optical sensor layer comprises a plurality of optical sensors, the optical sensors and the black matrix are arranged in an aligned mode in the laminating direction, and a liquid crystal layer at part of pixel positions forms a dot pattern for forming a point light source.
2. The fingerprint recognition display panel of claim 1, wherein: the surface of the optical sensor in the direction perpendicular to the laminating direction is L-shaped, wherein two sides of the L-shape respectively extend in parallel along two adjacent sides of the frame of the black matrix.
3. The fingerprint recognition display panel of claim 1, wherein: the optical sensor and the corresponding detection circuit are arranged on the array substrate.
4. The fingerprint recognition display panel of claim 1, wherein: the optical sensor layer further comprises an optical sensing substrate, and the optical sensor and the corresponding detection circuit are arranged on the optical sensing substrate.
5. The fingerprint recognition display panel of claim 3 or 4, wherein: the electrode on the side, close to the backlight source, of the optical sensor is made of shading metal, and the electrode on the side, far away from the backlight source, of the optical sensor is made of transparent metal.
6. The fingerprint recognition display panel of claim 3 or 4, wherein: the optical sensor is a PIN photosensitive device, a PN photosensitive device or a Schottky photosensitive device.
7. The fingerprint recognition display panel of claim 6, wherein: the detection circuit includes: the data reading circuit comprises a data reading signal line and a thin film transistor, wherein the grid electrode of the thin film transistor is electrically connected with a control signal line of a driving circuit, the first pole of the thin film transistor is connected with the first electrode of the light sensor, and the second pole of the thin film transistor is connected with the data reading signal line.
8. A fingerprint recognition method, characterized by being implemented using the fingerprint recognition display panel of any one of claims 1 to 7.
9. The fingerprint recognition method according to claim 8, wherein: the backlight source emits backlight which passes through the first polarizing plate, the dot pattern and the second polarizing plate to form a point light source.
10. A display device characterized by comprising the fingerprint recognition display panel according to any one of claims 1 to 7.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010097506.4A CN111258096A (en) | 2020-02-17 | 2020-02-17 | Fingerprint identification display panel, fingerprint identification method and display device |
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| CN202010097506.4A CN111258096A (en) | 2020-02-17 | 2020-02-17 | Fingerprint identification display panel, fingerprint identification method and display device |
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| TWI738488B (en) * | 2020-09-01 | 2021-09-01 | 勝薪科技股份有限公司 | Fingerprint identification assembly and display device |
| US12027543B2 (en) | 2021-02-03 | 2024-07-02 | Wuhan China Star Optoelectronics Technology Co., Ltd. | Array substrate and display panel |
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| US12027543B2 (en) | 2021-02-03 | 2024-07-02 | Wuhan China Star Optoelectronics Technology Co., Ltd. | Array substrate and display panel |
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