CN106326855B - Fingerprint acquisition method and module, color film substrate and display device - Google Patents
Fingerprint acquisition method and module, color film substrate and display device Download PDFInfo
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- CN106326855B CN106326855B CN201610696006.6A CN201610696006A CN106326855B CN 106326855 B CN106326855 B CN 106326855B CN 201610696006 A CN201610696006 A CN 201610696006A CN 106326855 B CN106326855 B CN 106326855B
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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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- 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
- G02F1/133514—Colour filters
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Abstract
The invention discloses a fingerprint acquisition method and module, a color film substrate and a display device, and belongs to the technical field of display. The method comprises the following steps: the fingerprint collection module judges whether the current state of the fingerprint identification sensor is a fingerprint collection state, and when the current state is the fingerprint collection state, the fingerprint collection module controls the display screen to improve the intensity of light emitted and collects fingerprints of users through the fingerprint identification sensor. The invention solves the problem that the fingerprint of the user cannot be effectively identified in the related technology, improves the accuracy of the determined lines of the finger of the user, and can further effectively identify the fingerprint of the user.
Description
Technical Field
The invention relates to the technical field of display, in particular to a fingerprint acquisition method and module, a color film substrate and a display device.
Background
With the development of display technology, display devices having a fingerprint recognition function are widely used. The user can touch the display screen of the display device with a finger so that the display device can collect and identify the fingerprint of the user.
In the related art, a display device includes a display screen and a fingerprint acquisition module, where the display screen includes a display panel and a backlight module disposed on a light incident side of the display panel, and the display panel includes a color film substrate and an array substrate that are formed by box-aligning, and a liquid crystal located between the color film substrate and the array substrate. The array substrate is provided with a plurality of Thin Film Transistor (TFT) structures arranged in an array and a plurality of fingerprint identification sensors arranged in an array, and all the fingerprint identification sensors are connected with the fingerprint acquisition module. Under user's the condition of finger touch display screen, the light that backlight unit sent is after penetrating display panel, can be reflected to the fingerprint identification sensor on the array substrate by user's finger, and because the position surface unevenness at fingerprint place on the finger, make the moment that the fingerprint collection module gathers the light of being reflected by each position of finger through the fingerprint identification sensor different, the moment that the fingerprint collection module can be according to the light of gathering through the fingerprint identification sensor, confirm the line that the user pointed, and then discern user's fingerprint.
Because among the correlation technique, the fingerprint collection module is when gathering the light that the finger reflects through fingerprint identification sensor, still can gather some light of shining in the environment on display panel, that is, the light that the fingerprint collection module gathered through fingerprint identification sensor not only includes the light that the user pointed the reflection, but also includes the light in the environment, consequently, the line accuracy that the user that the fingerprint collection module determined points is lower, and then can't effectual fingerprint to the user discerns.
Disclosure of Invention
The invention provides a fingerprint acquisition method and module, a color film substrate and a display device, and aims to solve the problem that fingerprints of users cannot be effectively identified. The technical scheme is as follows:
in a first aspect, a fingerprint acquisition method is provided, the method including:
the fingerprint acquisition module judges whether the current state of the fingerprint identification sensor is a fingerprint acquisition state;
when the current state of the fingerprint identification sensor is a fingerprint acquisition state, the fingerprint acquisition module controls the display screen to improve the intensity of the emitted light;
the fingerprint acquisition module acquires the fingerprint of the user through the fingerprint identification sensor.
Optionally, the display screen includes display panel and backlight module, fingerprint collection module control display screen improves the intensity of the light that sends, includes:
the fingerprint acquisition module controls the backlight module to improve the intensity of the emitted light.
Optionally, the display screen includes a display panel and a backlight module, a color film substrate in the display panel includes a plurality of color resist blocks arranged in an array and an auxiliary light-emitting structure located between any two adjacent color resist blocks, and when a pressure difference between two ends of the auxiliary light-emitting structure is greater than a preset pressure difference, the auxiliary light-emitting structure can emit light;
fingerprint collection module control display screen improves the intensity of the light of sending, include:
the fingerprint acquisition module controls the pressure difference between two ends of at least one auxiliary light-emitting structure to be greater than the preset pressure difference.
Optionally, the auxiliary light emitting structure is an organic light emitting diode OLED structure, the OLED structure includes a semiconductor anode layer, a light emitting layer and a metal cathode layer which are sequentially stacked,
the semiconductor anode layer is made of Indium Tin Oxide (ITO), the semiconductor anode layer is close to the light emergent side of the display screen, and the metal cathode layer is far away from the light emergent side of the display screen;
when the pressure difference between the semiconductor anode layer and the metal cathode layer is larger than the preset pressure difference, the light emitting layer can emit white light.
Optionally, the fingerprint collection module determines whether the current state of the fingerprint identification sensor is a fingerprint collection state, including:
the fingerprint acquisition module judges whether a photocurrent transmitted by a fingerprint identification sensor is received, wherein the photocurrent is generated when the intensity of light received by the fingerprint identification sensor is greater than a preset intensity;
and when the photocurrent is received, the fingerprint acquisition module determines that the current state of the fingerprint identification sensor is a fingerprint acquisition state.
In a second aspect, a color filter substrate is provided, where the color filter substrate includes: a plurality of color resistance blocks arranged in an array and an auxiliary light-emitting structure positioned between any two adjacent color resistance blocks,
when the pressure difference between the two ends of the auxiliary light-emitting structure is larger than the preset pressure difference, the auxiliary light-emitting structure can emit light.
Optionally, when the pressure difference between the two ends of the auxiliary light emitting structure is not greater than the preset pressure difference, the auxiliary light emitting structure does not emit light.
Optionally, the auxiliary light emitting structure is an organic light emitting diode OLED structure, the OLED structure includes a semiconductor anode layer, a light emitting layer and a metal cathode layer which are sequentially stacked,
the semiconductor anode layer is made of Indium Tin Oxide (ITO), the semiconductor anode layer is close to the light emergent side of the display screen, and the metal cathode layer is far away from the light emergent side of the display screen;
when the pressure difference between the semiconductor anode layer and the metal cathode layer is larger than the preset pressure difference, the light emitting layer can emit white light.
In a third aspect, a fingerprint acquisition module is provided, the fingerprint acquisition module comprising:
the judging unit is used for judging whether the current state of the fingerprint identification sensor is a fingerprint acquisition state or not;
the control unit is used for controlling the display screen to improve the intensity of the emitted light when the current state of the fingerprint identification sensor is a fingerprint acquisition state;
and the acquisition unit is used for acquiring the fingerprint of the user through the fingerprint identification sensor.
Optionally, the display screen includes a display panel and a backlight module, and the control unit is further configured to:
and controlling the backlight module to improve the intensity of the emitted light.
Optionally, the display screen includes a display panel and a backlight module, a color film substrate in the display panel includes a plurality of color resist blocks arranged in an array and an auxiliary light-emitting structure located between any two adjacent color resist blocks, and when a pressure difference between two ends of the auxiliary light-emitting structure is greater than a preset pressure difference, the auxiliary light-emitting structure can emit light;
the control unit is further configured to:
and controlling the pressure difference between two ends of at least one auxiliary light-emitting structure to be larger than the preset pressure difference.
Optionally, the auxiliary light emitting structure is an organic light emitting diode OLED structure, the OLED structure includes a semiconductor anode layer, a light emitting layer and a metal cathode layer which are sequentially stacked,
the semiconductor anode layer is made of Indium Tin Oxide (ITO), the semiconductor anode layer is close to the light emergent side of the display screen, and the metal cathode layer is far away from the light emergent side of the display screen;
when the pressure difference between the semiconductor anode layer and the metal cathode layer is larger than the preset pressure difference, the light emitting layer can emit white light.
Optionally, the determining unit is further configured to:
judging whether a photocurrent transmitted by a fingerprint identification sensor is received, wherein the photocurrent is generated when the intensity of light received by the fingerprint identification sensor is greater than a preset intensity;
and when the photocurrent is received, determining the current state of the fingerprint identification sensor to be a fingerprint acquisition state.
In a fourth aspect, a display device is provided, the display device comprising a fingerprint acquisition module and a display screen,
the fingerprint acquisition module is the fingerprint acquisition module of the third aspect;
the display screen comprises the color film substrate of the second aspect.
In summary, the present invention provides a fingerprint collection method and apparatus, a color film substrate, and a display apparatus, in the fingerprint collection method, a fingerprint collection module may first determine whether a current state of a fingerprint identification sensor is a fingerprint collection state, and control a display screen to increase intensity of light emitted when the current state of the fingerprint identification sensor is the fingerprint collection state, and then collect a fingerprint of a user through the fingerprint identification sensor. Because when fingerprint collection module passes through fingerprint identification sensor collection user's fingerprint, the intensity of the light that the display screen sent is higher, and at this moment, the shared proportion of light by user's finger reflection in the light that fingerprint identification sensor received is great, consequently, has weakened the influence of the line of light in the environment to fingerprint collection module definite user's finger, has improved the accuracy of the line of the user's finger who determines, and then can effectually discern user's fingerprint.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1-1 is a flowchart of a fingerprint acquisition method according to an embodiment of the present invention;
fig. 1-2 are schematic diagrams of fingerprint acquisition according to an embodiment of the present invention;
fig. 1-3 are schematic structural diagrams of a display screen according to an embodiment of the present invention;
fig. 1-4 are schematic structural diagrams of a fingerprint acquisition module according to an embodiment of the present invention;
fig. 1-5 are schematic structural diagrams of another display screen provided in an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a color film substrate according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a fingerprint acquisition module according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a display device according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
As shown in fig. 1-1, an embodiment of the present invention provides a fingerprint acquisition method, which may be used in a fingerprint acquisition module, and the fingerprint acquisition method may include:
And 102, when the current state of the fingerprint identification sensor is a fingerprint acquisition state, controlling the display screen to improve the intensity of the emitted light by the fingerprint acquisition module.
In summary, in the fingerprint collection method, the fingerprint collection module may first determine whether the current state of the fingerprint identification sensor is the fingerprint collection state, and control the display screen to increase the intensity of the emitted light when the current state of the fingerprint identification sensor is the fingerprint collection state, and then collect the fingerprint of the user through the fingerprint identification sensor. Because when fingerprint collection module passes through fingerprint identification sensor collection user's fingerprint, the intensity of the light that the display screen sent is higher, and at this moment, the shared proportion of light by user's finger reflection in the light that fingerprint identification sensor received is great, consequently, has weakened the influence of the line of light in the environment to fingerprint collection module definite user's finger, has improved the accuracy of the line of the user's finger who determines, and then can effectually discern user's fingerprint.
Fig. 1-2 are schematic diagrams of fingerprint acquisition according to an embodiment of the present invention, as shown in fig. 1-2, when the current state of the fingerprint identification sensor is a fingerprint acquisition state, a finger Q of a user touches a display screen 1, and a light M emitted from the display screen is reflected to a fingerprint identification sensor K in the display screen 1 by the finger Q of the user after being emitted from the display screen 1, and at the same time, a part of a light N in an environment irradiated on the display screen 1 is also irradiated on the fingerprint identification sensor K, at this time, a fingerprint acquisition module (not shown in fig. 1-2) in an embodiment of the present invention may control the display screen 1 to increase an intensity of the emitted light M, and acquire a fingerprint of the user through the fingerprint identification sensor K, so that a ratio of light reflected by the finger of the user (i.e., light reflected to the fingerprint identification sensor K by the user in the light M emitted from the display screen) in the light received by the fingerprint identification sensor K is relatively large The influence of the light N in the environment on the fingerprint acquisition module to determine the lines of the finger of the user is weakened.
On one hand, fig. 1 to 3 are schematic structural diagrams of a display screen 1 according to an embodiment of the present invention, as shown in fig. 1 to 3, the display screen 1 may include a display panel 10 and a backlight module 11, and when the fingerprint acquisition module controls the display screen to increase the intensity of the emitted light in step 102, the fingerprint acquisition module 2 may be implemented by controlling the backlight module 11 to increase the intensity of the emitted light.
Specifically, the backlight module 11 may include a backlight control unit 111 and a backlight source 112, the fingerprint acquisition module 2 is connected to the backlight control unit 111, the fingerprint acquisition module 2 may also be connected to a fingerprint identification sensor K in the display screen 1, and when the fingerprint acquisition module 2 controls the backlight module 11 to improve the intensity of the emitted light, the fingerprint acquisition module 2 may improve the intensity of the emitted light from the backlight source 112 by controlling the backlight control unit 111. Optionally, if the determination result in step 101 that determines whether the current state of the fingerprint identification sensor is the fingerprint acquisition state is: if the current status of the fingerprint sensor is not the fingerprint collection status, after step 101, the fingerprint collection method may further include: the fingerprint collection module 2 may not perform any action, or the fingerprint collection module 2 may prohibit the backlight control unit 111 from being controlled to increase the intensity of the light emitted from the backlight 112.
Furthermore, after the user touches the display screen with the finger, the light reflected by the user finger is received by the fingerprint identification sensor, the intensity of the light received by the fingerprint identification sensor is greater than the preset intensity, the fingerprint identification sensor generates a photocurrent, and transmits the photocurrent to the fingerprint acquisition module, and the fingerprint acquisition module can determine that the current state of the fingerprint identification sensor is the fingerprint acquisition state after receiving the photocurrent, and at the moment, the fingerprint acquisition module can generate an indication signal according to the photocurrent and send the indication signal to the backlight control unit, so that the backlight control unit can improve the intensity of the light emitted by the backlight according to the indication signal after receiving the indication signal. At this moment, the intensity of the light that the display screen sent is higher, and the shared proportion of light that is reflected by user's finger in the light that fingerprint identification sensor received is great, and the shared proportion of light in the environment is less, has also weakened the influence of the line of light in the environment to the fingerprint collection module definite user's finger, has improved the accuracy of the line of the user's finger who determines.
For example, fig. 1 to 4 are schematic structural diagrams of a fingerprint acquisition module 2 according to an embodiment of the present invention, as shown in fig. 1 to 4, the fingerprint acquisition module 2 may include a Thin Film Transistor (TFT) 21, an Amplifier (AMP) 22, a digital-to-analog converter (AD) 23, and a Micro Control Unit (MCU) 24, which are connected in sequence, where the TFT-21 may be connected to a fingerprint identification sensor K, and the MCU-24 may be connected to a backlight control Unit 111, and the fingerprint identification sensor K may be a diode.
On the other hand, fig. 1 to 5 are schematic structural diagrams of another display screen 1 according to an embodiment of the present invention, as shown in fig. 1 to 5, the display screen 1 includes a display panel 12 and a backlight module 11, the display panel 12 may include a color filter substrate 121 and an array substrate 122 formed in a box-to-box manner, a liquid crystal (not shown in fig. 1 to 5) may be filled between the color filter substrate 121 and the array substrate 122, the color filter substrate 122 may include a substrate (not shown in fig. 1 to 5), a plurality of color resist blocks a formed on the substrate and arranged in an array manner, and an auxiliary light emitting structure B located between any two adjacent color resist blocks a, and when a pressure difference between two ends of the auxiliary light emitting structure is greater than a preset pressure difference, the auxiliary light emitting structure B may emit light. For example, the plurality of color-resist blocks a may include a red color-resist block, a green color-resist block, and a blue color-resist block.
Further, after the user touches the touch display screen, the light reflected by the user finger is received by the fingerprint identification sensor, the intensity of the light received by the fingerprint identification sensor is greater than the preset intensity, the fingerprint identification sensor generates a light current, the light current is transmitted to the fingerprint acquisition module, the current state of the fingerprint identification sensor can be determined to be a fingerprint acquisition state after the fingerprint acquisition module receives the light current, and the intensity of the light sent by the display screen can be determined by the fingerprint acquisition module at the moment. When the fingerprint collection module controls the display screen to improve the intensity of the emitted light in step 102, the fingerprint collection module can control the pressure difference at two ends of at least one auxiliary light-emitting structure to be greater than a preset pressure difference, preferably, the fingerprint collection module can control the pressure difference at two ends of all the auxiliary light-emitting structures on the display screen to be greater than the preset pressure difference, that is, when the display screen needs to be controlled to improve the intensity of the emitted light, the pressure difference at two ends of the auxiliary light-emitting structure is controlled to be greater than the preset pressure difference, so that when the backlight module emits light, the auxiliary light-emitting structure can emit light, and the intensity of the emitted light of the display screen is improved.
Optionally, if the fingerprint acquisition module determines in step 101 whether the current state of the fingerprint identification sensor is the fingerprint acquisition state, the determination result is: if the current status of the fingerprint sensor is not the fingerprint collection status, after step 101, the fingerprint collection method may further include: the fingerprint acquisition module can control the pressure difference between two ends of all the auxiliary light-emitting structures on the display screen to be not greater than (less than or equal to) the preset pressure difference, so that all the auxiliary light-emitting structures on the display screen do not emit light, and at the moment, the effect of the auxiliary light-emitting structures in the display screen is the same as the effect of a Black Matrix (English: Black Matrix; BM for short) in the related technology in the display screen.
For example, with continued reference to fig. 1-5, the auxiliary light-Emitting structure B may be an organic light-Emitting Diode (OLED) structure, and the OLED structure may include a semiconductor anode layer X, a light-Emitting layer Y, and a metal cathode layer Z stacked in sequence. The material of the semiconductor anode layer X may be Indium Tin Oxide (ITO), the semiconductor anode layer X may be disposed near the light emitting side of the display screen 1, the metal cathode layer Z may be disposed far from the light emitting side of the display screen 1, and when the voltage difference between the semiconductor anode layer X and the metal cathode layer Z is greater than a predetermined voltage difference, the light emitting layer Y may emit white light.
Because the auxiliary light-emitting structure in the embodiment of the invention is an OLED structure, the material of the semiconductor anode layer in the OLED structure is transparent ITO, the semiconductor anode layer is arranged at the light-emitting side close to the display screen, and the light-emitting layer in the OLED structure can emit white light which can penetrate through the semiconductor anode layer and is emitted from the light-emitting side of the display screen.
In summary, in the fingerprint collection method, the fingerprint collection module may first determine whether the current state of the fingerprint identification sensor is the fingerprint collection state, and control the display screen to increase the intensity of the emitted light when the current state of the fingerprint identification sensor is the fingerprint collection state, and then collect the fingerprint of the user through the fingerprint identification sensor. Because when fingerprint collection module passes through fingerprint identification sensor collection user's fingerprint, the intensity of the light that the display screen sent is higher, and at this moment, the shared proportion of light by user's finger reflection in the light that fingerprint identification sensor received is great, consequently, has weakened the influence of the line of light in the environment to fingerprint collection module definite user's finger, has improved the accuracy of the line of the user's finger who determines, and then can effectually discern user's fingerprint.
As shown in fig. 2, an embodiment of the present invention provides a color filter substrate 121, where the color filter substrate 121 may include: the array-arranged color resistor blocks A and the auxiliary light-emitting structure B are positioned between any two adjacent color resistor blocks A, and when the pressure difference between two ends of the auxiliary light-emitting structure B is greater than the preset pressure difference, the auxiliary light-emitting structure B can emit light.
In summary, embodiments of the present invention provide a color filter substrate, in which an auxiliary light emitting structure is disposed between any two adjacent color resist blocks, and the auxiliary light emitting structure can emit light when the pressure difference between the two ends of the auxiliary light emitting structure is greater than the preset pressure difference, therefore, when the luminous intensity of the display screen needs to be improved, a certain voltage is applied to the two ends of the auxiliary luminous structure, so that the voltage difference between the two ends of the auxiliary luminous structure is larger than the preset voltage difference, and the auxiliary luminous structure starts to emit light, thereby improving the intensity of the light rays emitted by the display screen, improving the proportion of the light rays reflected by the fingers of the user in the light rays received by the fingerprint identification sensor, and the influence of light rays in the environment on the fingerprint acquisition module to determine the lines of the finger of the user is weakened, the accuracy of the determined lines of the finger of the user is improved, and the fingerprint of the user can be effectively identified.
When the intensity of the light emitted by the display screen needs to be controlled to be improved, the fingerprint acquisition module can control the pressure difference at the two ends of at least one (or all) auxiliary light-emitting structure to be greater than the preset pressure difference, namely, when the intensity of the light emitted by the display screen needs to be controlled to be improved, the pressure difference at the two ends of the auxiliary light-emitting structure is controlled to be greater than the preset pressure difference, so that the auxiliary light-emitting structure can emit light when the backlight module emits light, and the intensity of the light emitted by the display screen is improved.
Optionally, when the current state of the fingerprint identification sensor is not the fingerprint collection state, the fingerprint collection module may control the pressure difference between the two ends of all the auxiliary light emitting structures in the color film substrate to be not greater than (less than or equal to) a preset pressure difference, so that all the auxiliary light emitting structures on the color film substrate do not emit light, and at this time, the role of the auxiliary light emitting structures in the color film substrate is the same as the role of the BM in the color film substrate in the related art.
For example, with continuing reference to fig. 2, the auxiliary light-emitting structure B may be an OLED structure, and the OLED structure may include a semiconductor anode layer X, a light-emitting layer Y, and a metal cathode layer Z stacked in sequence. The material of the semiconductor anode layer X may be ITO, the semiconductor anode layer X may be disposed near a light emitting side of a display screen (not shown in fig. 2), the metal cathode layer Z may be disposed far away from the light emitting side of the display screen, and when a pressure difference between the semiconductor anode layer X and the metal cathode layer Z is greater than a preset pressure difference, the light emitting layer Y may emit white light. Because the auxiliary light-emitting structure in the embodiment of the invention is an OLED structure, the material of the semiconductor anode layer in the OLED structure is transparent ITO, the semiconductor anode layer is arranged at the light-emitting side close to the display screen, and the light-emitting layer in the OLED structure can emit white light which can penetrate through the semiconductor anode layer and is emitted from the light-emitting side of the display screen.
In summary, embodiments of the present invention provide a color filter substrate, in which an auxiliary light emitting structure is disposed between any two adjacent color resist blocks, and the auxiliary light emitting structure can emit light when the pressure difference between the two ends of the auxiliary light emitting structure is greater than the preset pressure difference, therefore, when the luminous intensity of the display screen needs to be improved, a certain voltage is applied to the two ends of the auxiliary luminous structure, so that the voltage difference between the two ends of the auxiliary luminous structure is larger than the preset voltage difference, and the auxiliary luminous structure starts to emit light, thereby improving the intensity of the light rays emitted by the display screen, improving the proportion of the light rays reflected by the fingers of the user in the light rays received by the fingerprint identification sensor, and the influence of light rays in the environment on the fingerprint acquisition module to determine the lines of the finger of the user is weakened, the accuracy of the determined lines of the finger of the user is improved, and the fingerprint of the user can be effectively identified.
As shown in fig. 3, an embodiment of the present invention provides a fingerprint acquisition module 2, where the fingerprint acquisition module 2 may include:
a judging unit 201, configured to judge whether a current state of the fingerprint identification sensor is a fingerprint acquisition state;
the control unit 202 is used for controlling the display screen to improve the intensity of the emitted light when the current state of the fingerprint identification sensor is a fingerprint acquisition state;
and the acquisition unit 203 is used for acquiring the fingerprint of the user through the fingerprint identification sensor.
In summary, in the fingerprint collection module, the determining unit may first determine whether the current state of the fingerprint identification sensor is the fingerprint collection state, and when the current state of the fingerprint identification sensor is the fingerprint collection state, the control unit controls the display screen to increase the intensity of the emitted light, and then the collecting unit collects the fingerprint of the user through the fingerprint identification sensor. Because when fingerprint collection module passes through fingerprint identification sensor collection user's fingerprint, the intensity of the light that the display screen sent is higher, and at this moment, the shared proportion of light by user's finger reflection in the light that fingerprint identification sensor received is great, consequently, has weakened the influence of the line of light in the environment to fingerprint collection module definite user's finger, has improved the accuracy of the line of the user's finger who determines, and then can effectually discern user's fingerprint.
It should be noted that the fingerprint acquisition module 2 in the embodiment of the present invention may include a TFT, an AMP, an AD, and an MCU, which are connected in sequence, and the MCU may include the above determination unit 201, the control unit 202, and the acquisition unit 203.
Optionally, the display screen may include a display panel and a backlight module, and the control unit 202 may further be configured to: and controlling the backlight module to improve the intensity of the emitted light.
Optionally, the display screen includes a display panel and a backlight module, a color film substrate in the display panel includes a plurality of color resist blocks arranged in an array and an auxiliary light-emitting structure located between any two adjacent color resist blocks, and when a pressure difference between two ends of the auxiliary light-emitting structure is greater than a preset pressure difference, the auxiliary light-emitting structure can emit light; the control unit 202 may also be configured to: and controlling the pressure difference between two ends of the at least one auxiliary light-emitting structure to be larger than a preset pressure difference.
Optionally, the auxiliary light emitting structure is an organic light emitting diode OLED structure, the OLED structure includes a semiconductor anode layer, a light emitting layer, and a metal cathode layer, which are sequentially stacked, the semiconductor anode layer is made of indium tin oxide ITO, the semiconductor anode layer is close to the light emitting side of the display screen, and the metal cathode layer is far away from the light emitting side of the display screen; when the pressure difference between the semiconductor anode layer and the metal cathode layer is larger than the preset pressure difference, the light emitting layer can emit white light.
Optionally, the determining unit 201 may further be configured to: judging whether a photocurrent transmitted by the fingerprint identification sensor is received, wherein the photocurrent is generated when the intensity of light received by the fingerprint identification sensor is greater than the preset intensity; and when the photocurrent is received, determining the current state of the fingerprint identification sensor as a fingerprint acquisition state.
In summary, in the fingerprint collection module, the determining unit may first determine whether the current state of the fingerprint identification sensor is the fingerprint collection state, and when the current state of the fingerprint identification sensor is the fingerprint collection state, the control unit controls the display screen to increase the intensity of the emitted light, and then the collecting unit collects the fingerprint of the user through the fingerprint identification sensor. Because when fingerprint collection module passes through fingerprint identification sensor collection user's fingerprint, the intensity of the light that the display screen sent is higher, and at this moment, the shared proportion of light by user's finger reflection in the light that fingerprint identification sensor received is great, consequently, has weakened the influence of the line of light in the environment to fingerprint collection module definite user's finger, has improved the accuracy of the line of the user's finger who determines, and then can effectually discern user's fingerprint.
As shown in fig. 4, an embodiment of the present invention provides a display device 4, where the display device 4 may include a fingerprint acquisition module 2, and the fingerprint acquisition module 2 may be the fingerprint acquisition module 2 shown in fig. 3. The display device 4 may further include a display screen 1, and the display screen 1 may include a color film substrate 121 shown in fig. 2. The display device 4 may be: the fingerprint identification device comprises any product or component with a display function and a fingerprint acquisition function, such as a liquid crystal panel, electronic paper, an OLED panel, a mobile phone, a tablet personal computer, a television, a display, a notebook computer, a digital photo frame, a navigator and the like.
In summary, the embodiment of the present invention provides a display device, in which before a fingerprint is collected by a fingerprint collection module in the display device, it is first determined whether a current state of a fingerprint identification sensor is a fingerprint collection state, and when the current state of the fingerprint identification sensor is the fingerprint collection state, a display screen is controlled to increase intensity of light emitted, and then a fingerprint of a user is collected by the fingerprint identification sensor. Because when fingerprint collection module passes through fingerprint identification sensor collection user's fingerprint, the intensity of the light that the display screen sent is higher, and at this moment, the shared proportion of light by user's finger reflection in the light that fingerprint identification sensor received is great, consequently, has weakened the influence of the line of light in the environment to fingerprint collection module definite user's finger, has improved the accuracy of the line of the user's finger who determines, and then can effectually discern user's fingerprint.
It should be noted that, the order of the steps of the fingerprint acquisition method provided in the embodiment of the present invention may be appropriately adjusted, and the steps may also be increased or decreased according to the circumstances, and any method that can be easily conceived by those skilled in the art within the technical scope of the present invention should be included in the protection scope of the present invention, and therefore, the detailed description is omitted.
It can be clearly understood by those skilled in the art that, for convenience and brevity of description, the display device embodiment, the fingerprint acquisition module embodiment, the color film substrate embodiment and the fingerprint acquisition method embodiment described above may be referred to each other, and are not described herein again.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (14)
1. A fingerprint acquisition method, the method comprising:
the fingerprint acquisition module judges whether the current state of the fingerprint identification sensor is a fingerprint acquisition state;
when the current state of the fingerprint identification sensor is a fingerprint acquisition state, the fingerprint acquisition module controls the display screen to improve the intensity of the emitted light;
the fingerprint acquisition module acquires the fingerprint of the user through the fingerprint identification sensor;
the display screen comprises a display panel and a backlight module, a color film substrate in the display panel comprises a plurality of color resistance blocks which are arranged in an array mode and an auxiliary light-emitting structure which is positioned between any two adjacent color resistance blocks, and when the pressure difference between two ends of the auxiliary light-emitting structure is larger than a preset pressure difference, the auxiliary light-emitting structure can emit light; fingerprint collection module control display screen improves the intensity of the light of sending, include:
the fingerprint acquisition module controls the pressure difference between two ends of at least one auxiliary light-emitting structure to be greater than the preset pressure difference.
2. The method of claim 1, wherein the fingerprint acquisition module controls the display to increase the intensity of the emitted light, further comprising:
the fingerprint acquisition module controls the backlight module to improve the intensity of the emitted light.
3. The method of claim 1, wherein the fingerprint acquisition module controls a pressure difference across at least one of the auxiliary light emitting structures to be greater than the preset pressure difference, and comprises:
the fingerprint acquisition module controls the pressure difference of two ends of the auxiliary light-emitting structures to be larger than the preset pressure difference;
the method further comprises the following steps:
when the current state of the fingerprint identification sensor is not a fingerprint collection state, the fingerprint collection module controls the pressure difference at two ends of the auxiliary light-emitting structure to be not greater than the preset pressure difference, so that the auxiliary light-emitting structure does not emit light and is light-proof.
4. The method of claim 1, wherein the auxiliary light emitting structure is an Organic Light Emitting Diode (OLED) structure comprising a semiconductor anode layer, a light emitting layer, and a metal cathode layer stacked in sequence,
the semiconductor anode layer is made of Indium Tin Oxide (ITO), the semiconductor anode layer is close to the light emergent side of the display screen, and the metal cathode layer is far away from the light emergent side of the display screen;
when the pressure difference between the semiconductor anode layer and the metal cathode layer is larger than the preset pressure difference, the light emitting layer can emit white light.
5. The method of claim 1, wherein the determining, by the fingerprinting module, whether the current state of the fingerprint recognition sensor is the fingerprinting state comprises:
the fingerprint acquisition module judges whether a photocurrent transmitted by the fingerprint identification sensor is received, wherein the photocurrent is generated when the intensity of light received by the fingerprint identification sensor is greater than a preset intensity;
and when the photocurrent is received, the fingerprint acquisition module determines that the current state of the fingerprint identification sensor is a fingerprint acquisition state.
6. The color film substrate is applied to a display panel of a display screen of a display device, and comprises: a plurality of color resistance blocks arranged in an array and an auxiliary light-emitting structure positioned between any two adjacent color resistance blocks,
when the pressure difference between the two ends of the auxiliary light-emitting structure is greater than the preset pressure difference, the auxiliary light-emitting structure can emit light;
the display device further includes: a fingerprint acquisition module; every supplementary light emitting structure all with fingerprint collection module connects, fingerprint collection module is used for controlling the pressure differential at supplementary light emitting structure's both ends.
7. The color filter substrate of claim 6,
and when the pressure difference between the two ends of the auxiliary light-emitting structure is not greater than the preset pressure difference, the auxiliary light-emitting structure does not emit light and is light-proof.
8. The color film substrate of claim 6 or 7, wherein the auxiliary light emitting structure is an Organic Light Emitting Diode (OLED) structure, the OLED structure comprises a semiconductor anode layer, a light emitting layer and a metal cathode layer which are sequentially stacked,
the semiconductor anode layer is made of Indium Tin Oxide (ITO), the semiconductor anode layer is close to the light emergent side of the display screen, and the metal cathode layer is far away from the light emergent side of the display screen;
when the pressure difference between the semiconductor anode layer and the metal cathode layer is larger than the preset pressure difference, the light emitting layer can emit white light.
9. A fingerprint acquisition module, the fingerprint acquisition module comprising:
the judging unit is used for judging whether the current state of the fingerprint identification sensor is a fingerprint acquisition state or not;
the control unit is used for controlling the display screen to improve the intensity of the emitted light when the current state of the fingerprint identification sensor is a fingerprint acquisition state;
the acquisition unit is used for acquiring the fingerprint of the user through the fingerprint identification sensor;
the display screen comprises a display panel and a backlight module, a color film substrate in the display panel comprises a plurality of color resistance blocks arranged in an array manner and an auxiliary light-emitting structure positioned between any two adjacent color resistance blocks, and the auxiliary light-emitting structure can emit light when the pressure difference between two ends of the auxiliary light-emitting structure is greater than a preset pressure difference;
the control unit is used for:
and controlling the pressure difference between two ends of at least one auxiliary light-emitting structure to be larger than the preset pressure difference.
10. The fingerprint acquisition module of claim 9, wherein the control unit is further configured to:
and controlling the backlight module to improve the intensity of the emitted light.
11. The fingerprint acquisition module of claim 9, wherein the control unit is configured to:
controlling the pressure difference of two ends of the auxiliary light-emitting structures to be larger than the preset pressure difference;
the control unit is further configured to: when the current state of the fingerprint identification sensor is not a fingerprint collection state, the pressure difference at two ends of the auxiliary light-emitting structures is controlled to be not greater than the preset pressure difference, so that the auxiliary light-emitting structures do not emit light and are light-proof.
12. The fingerprint acquisition module of claim 9, wherein the auxiliary light emitting structure is an Organic Light Emitting Diode (OLED) structure, the OLED structure comprises a semiconductor anode layer, a light emitting layer and a metal cathode layer which are sequentially stacked,
the semiconductor anode layer is made of Indium Tin Oxide (ITO), the semiconductor anode layer is close to the light emergent side of the display screen, and the metal cathode layer is far away from the light emergent side of the display screen;
when the pressure difference between the semiconductor anode layer and the metal cathode layer is larger than the preset pressure difference, the light emitting layer can emit white light.
13. The fingerprint acquisition module of claim 9, wherein the determination unit is further configured to:
judging whether a photocurrent transmitted by the fingerprint identification sensor is received, wherein the photocurrent is generated when the intensity of light received by the fingerprint identification sensor is greater than a preset intensity;
and when the photocurrent is received, determining the current state of the fingerprint identification sensor to be a fingerprint acquisition state.
14. A display device is characterized in that the display device comprises a fingerprint acquisition module and a display screen,
the fingerprint acquisition module is the fingerprint acquisition module of any one of claims 9 to 13;
the display screen comprises the color film substrate of any one of claims 6 to 8.
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