WO2019219062A1

WO2019219062A1 - Touch assembly operation method and device capable of synchronously verifying fingerprint information

Info

Publication number: WO2019219062A1
Application number: PCT/CN2019/087276
Authority: WO
Inventors: 黄建东
Original assignee: 上海耕岩智能科技有限公司
Priority date: 2018-05-17
Filing date: 2019-05-16
Publication date: 2019-11-21
Also published as: CN110502957A; CN110502957B; TW202004276A; TWI720484B

Abstract

The present invention provides a touch assembly operation method and device capable of synchronously verifying fingerprint information. The method is applied to the touch assembly operation device for synchronously verifying fingerprint information. The device comprises a display unit and a sensing unit. The display unit is provided with a fingerprint identification area; the sensing unit is located below the fingerprint identification area and is used for obtaining fingerprint information on the fingerprint identification area; the display unit is used for displaying at least one touch assembly in the fingerprint identification area. The method comprises the following steps: receiving an operation instruction of a user finger for a touch assembly, and synchronously acquiring the fingerprint information corresponding to the user finger. The solution above can effectively reduce the operation steps of user fingerprint acquisition, and improve the user experience.

Description

Touch component operation method and device for synchronously verifying fingerprint information

Technical field

The present invention relates to the field of electronic devices, and in particular, to a touch component operation method and apparatus for synchronously verifying fingerprint information.

Background technique

With the development of technology and advancement of technology, touch display panels have been widely used in devices that require human-computer interaction interfaces, such as operating screens of industrial computers, tablet computers, touch screens of smart phones, and the like. Since these devices are usually accompanied by a large amount of user information during use, the protection of user information security is particularly important. Among the many information security methods, fingerprint recognition encryption is an important one.

The current display panel technology, whether it is a liquid crystal display (LCD), an active array organic light emitting diode (AMOLED) display, or a micro-light-emitting diode (micro-LED) display, is a thin film transistor (TFT). The structure scans and drives a single pixel to achieve the display function of the on-screen pixel array. The main structure for forming the TFT switching function is a semiconductor field effect transistor (FET), wherein the well-known semiconductor layer is mainly composed of amorphous silicon, polycrystalline silicon, indium gallium zinc oxide (IGZO), or an organic compound mixed with carbon nanomaterials, and the like. . Since the structure of the photodiode can also be prepared by using such a semiconductor material, and the production equipment is also compatible with the production equipment of the TFT array, the prepared photodiode can be directly integrated with the TFT and realize the photodiode with the TFT. Scanning and driving functions are performed. Therefore, in recent years, TFT photodetecting diodes have been produced in the form of TFT array fabrication, and are widely used in X-ray sensing flat panel devices, such as those described in Patent No. CN103829959B and CN102903721B of the People's Republic of China.

Compared with the image sensor device prepared by the conventional crystalline material, the band gap of the TFT photodetecting array film material has visible light as the main absorption range, so it is more susceptible to interference from ambient visible light to form noise, resulting in signals. The noise ratio (SNR) is low. Due to this limitation, the initial application of the TFT light sensing array is mainly based on the application of the X-ray sensing tablet device. The main reason is that the X-ray is a short-wavelength light and the collimation is high, and the X-ray image is incident on the sensing first. The light wavelength conversion material disposed on the flat panel converts the X-ray image into a longer wavelength visible light and transmits it directly to the TFT light detecting array film directly inside the sensing plate, thereby avoiding noise interference caused by visible light in the surrounding environment, such as the above Chinese people. Republic patents CN103829959B, CN102903721B are described.

If such a well-known TFT visible light detecting array film is disposed in the display structure, it can be used as an implementation scheme for integrating the light detecting function into the display screen. However, due to factors such as the thickness of the display screen and the aperture of the display pixel, the actual image sensed by the photodetecting diode array is an image of optical distortion such as diffraction, and the optical signal penetrates the multi-layer structure of the display screen, and In the case where the optical display signal and the touch sensing signal coexist, it is very difficult to extract the useful optical signal from the low SNR scene, and the technical difficulty level reaches the level of nearly single photon imaging, and the related algorithm must be dependent on the light wave. Theoretical reconstruction can resolve the original image. In order to avoid this technical difficulty, it is well known that the arrangement of the visible light sensor film in the original display screen structure may require additional optical enhancement devices, or only the light sensor film may be disposed in the side of the display screen, and the non-vertical reflection is used to reach the side edges. Light is reconstructed by light image, for example, as described in Patent No. CN101359369B of the People's Republic of China. However, although such techniques can avoid the technical difficulties of low-light imaging, additional optical devices increase the thickness of the light-detecting display screen, and the configuration on the side of the display screen cannot satisfy the user's full-screen experience.

In short, due to the structure of the existing display screen, when the user operates the touch component (such as pictures, videos, etc.) on the display of the terminal, the terminal cannot synchronously collect the fingerprint of the user, and is not able to perform fingerprint recognition. operating. When fingerprint authentication is required, the user fingerprint needs to be collected again, which is cumbersome and brings a bad experience to the user.

In summary, it is particularly necessary to provide a scheme for synchronously collecting user fingerprints when the user operates the touch component on the display screen, so as to reduce the user operation steps and improve the user experience.

Summary of the invention

Therefore, it is required to provide a technical solution for the operation of the touch component for synchronously verifying the fingerprint information, which is used to solve the problem that when the terminal operates the touch component on the screen, the user's fingerprint cannot be collected synchronously, resulting in an increase in user operation steps. Experience problems such as poor experience.

To achieve the above object, the inventors provide a touch component operation method for synchronously verifying fingerprint information, the method being applied to a touch component operation device for synchronously verifying fingerprint information, the device comprising a display unit and a sensing unit, The display unit is provided with a fingerprint identification area, and the sensing unit is located below the fingerprint identification area for acquiring fingerprint information on the fingerprint identification area; the display unit is configured to display at least the fingerprint identification area a touch component;

The method includes the following steps:

Receiving an operation instruction of the user's finger on the touch component, and synchronously collecting fingerprint information corresponding to the user's finger.

Further, the method further includes the following steps:

Determining whether to execute the operation instruction of the touch component according to the fingerprint information collected by the synchronization; specifically: determining whether the fingerprint information corresponding to the synchronously collected user finger matches the preset fingerprint information, and if yes, executing the operation instruction, otherwise not executing The operation instruction.

Further, the sensing unit is a photodetecting array film, and the photodetecting array film includes PxQ pixel detecting regions, and each pixel detecting region is correspondingly provided with a pixel detecting structure, and each pixel detecting structure is configured. A set of one or more thin film transistors is used for the pixel thin film circuit and a photo detecting unit; the photo detecting unit comprises a photodiode or a photosensitive electro-optic tube.

Further, the photodetecting film is an array formed by photodiodes, the photodiode includes a photodiode sensing region, a photodiode layer is disposed in the photodiode sensing region, and the photodiode layer includes a p-type semiconductor layer The i-type semiconductor layer, the n-type semiconductor layer, the p-type semiconductor layer, the i-type semiconductor layer, and the n-type semiconductor layer are stacked from top to bottom, and the i-type semiconductor layer is a microcrystalline silicon structure or an amorphous silicon germanium structure.

Further, the photodetecting film is an array formed by a photosensitive electroplating tube, the photosensitive electroplating tube includes a photosensitive electromagnet sensing region, and the photosensitive electromagnet sensing region is provided with a photosensitive thin film transistor, and the photosensitive The thin film transistor includes a gate, a source, a drain, an insulating layer, and a light absorbing semiconductor layer; the photosensitive thin film transistor is an inverted coplanar structure, and the inverted coplanar structure includes: the gate, the insulating layer, and the source The pole is longitudinally disposed from bottom to top, the drain is laterally coplanar with the source; the insulating layer encloses the gate such that the gate and the source, the gate and the drain are not in contact; A gap matching between the drain and the drain forms a photosensitive leakage current path between the source and the drain, and the light absorbing semiconductor layer is disposed in the photosensitive leakage current channel.

Further, the fingerprint identification area includes a plurality of fingerprint identification sub-areas, and a sensing unit is disposed under each of the fingerprint identification sub-areas; the method includes:

Receiving a start instruction of the fingerprint recognition sub-area of the user, and opening a sensing unit below the fingerprint identification sub-area;

Alternatively, the user closes the fingerprint recognition sub-area and closes the sensing unit below the fingerprint recognition sub-area.

Further, the display unit is a self-luminous diode display screen, and the device further includes a cover glass, a touch screen, an optical glue, and an optical device;

The cover glass, the touch screen, the self-luminous diode display screen, the optical glue, the optical device, and the sensing unit are disposed from top to bottom; the touch screen is attached to the lower surface of the cover glass, and the optical adhesive is attached to the self. a lower surface of the LED display; the refractive index of the optical adhesive is smaller than a refractive index of the cover glass, the self-luminous diode display screen includes a plurality of display pixels; the device further includes a processor;

The fingerprint information corresponding to the synchronously collecting the user's finger includes:

The processor sends a display driving signal to the self-emitting diode display screen when the touch screen detects the touch signal of the user's finger;

The display pixel emits an optical signal when receiving the display driving signal of the processor, and the optical signal is reflected on the upper surface of the cover glass to form a reflected light signal;

The optical glue changes the optical path of the reflected light signal, and filters the reflected light signal of the reflected light signal at an incident angle of the optical glue greater than the first critical angle to obtain a first reflected light signal, and causes the first reflected light signal to enter the optical device; The first critical angle is a critical angle at which a reflected light signal can be totally reflected on the surface of the optical glue;

The optical device changes the optical path of the first reflected light signal, and filters the first reflected light signal of the first reflected light signal whose incident angle on the surface of the optical device is less than the first critical angle to obtain a second reflected light signal, and makes the second The reflective signal enters the access sensing unit at an incident angle less than a preset angle; the second critical angle is a critical angle at which the reflected light signal can be totally reflected on the upper surface of the cover glass;

The processor generates fingerprint information according to the second reflected light signal received by the sensing unit and outputs the fingerprint information.

Further, the self-luminous diode display screen includes MxN display pixels; the method includes:

The processor sequentially drives a single display pixel or a display pixel array on the display screen to emit an optical signal according to the preset timing electrical signal, so as to form a light spot or a light spot combination on the upper surface of the cover glass to scan the user's finger portion to form a reflected light signal.

The inventor also provides a touch component operating device for synchronously verifying fingerprint information, the device comprising a display unit, a sensing unit, a processor and a computer program, wherein the display unit is provided with a fingerprint recognition area, the sensing The unit is located below the fingerprint identification area for acquiring fingerprint information on the fingerprint identification area; the display unit is configured to display at least one touch component in the fingerprint identification area;

The computer program is executed by the processor to implement the following steps:

Receiving an operation instruction of the user's finger on the touch component, and controlling the sensing unit to synchronously collect the fingerprint information corresponding to the user's finger.

The controlling the sensing unit to synchronously collect the fingerprint information corresponding to the user's finger includes:

The touch component operation method and apparatus for synchronously verifying fingerprint information according to the prior art, the method is applied to a touch component operation device for synchronously verifying fingerprint information, and the device includes a display unit and a sensing device. a unit, the display unit is provided with a fingerprint identification area, the sensing unit is located below the fingerprint identification area, and is used for acquiring fingerprint information on the fingerprint identification area; the display unit is used in the fingerprint identification area At least one touch component is displayed inside. The method includes the following steps: receiving an operation instruction of a user's finger on the touch component, and synchronously collecting fingerprint information corresponding to the user's finger. The above solution can effectively reduce the operation steps of the user fingerprint collection and improve the user experience.

DRAWINGS

1 is a schematic diagram of an application structure of a photodetecting array film according to an embodiment of the present invention;

2 is a schematic diagram of display pixels of a self-luminous diode display screen according to an embodiment of the invention;

3 is a schematic diagram showing changes in optical paths of light-emitting reflection of a single display pixel according to an embodiment of the present invention;

4 is a schematic diagram showing changes in optical paths of a single display pixel illuminating reflection after setting an optical adhesive according to an embodiment of the invention;

FIG. 5 is a schematic diagram showing changes in optical paths of a single display pixel illuminating reflection after the optical glue and the optical device are disposed according to an embodiment of the invention; FIG.

FIG. 6 is a schematic diagram of an effective light emitting area corresponding to a single display pixel according to an embodiment of the present invention; FIG.

FIG. 7 is a schematic structural diagram of a touch component operation device for synchronously verifying fingerprint information according to an embodiment of the present invention; FIG.

FIG. 8 is a flowchart of a method for synchronously collecting fingerprint information according to an embodiment of the present invention; FIG.

FIG. 9 is a schematic structural diagram of a photodetecting unit according to an embodiment of the present invention;

FIG. 10 is a schematic structural diagram of a photodetecting unit according to another embodiment of the present invention; FIG.

FIG. 11 is a schematic structural diagram of a source and a drain according to another embodiment of the present invention; FIG.

FIG. 12 is a flowchart of preparing a photo detecting unit according to another embodiment of the present invention;

FIG. 13 is a flowchart of a method for operating a touch component for synchronously verifying fingerprint information according to an embodiment of the invention.

Reference mark:

1. Cover glass/touch screen;

2, self-luminous diode display; 21, display pixels;

3. Photodetection array film; 31, photosensitive pixel;

4, optical glue;

5, optical devices;

101, a gate; 102, a source; 103, a drain; 104, an insulating layer; 105, a light absorbing semiconductor layer.

Detailed ways

The detailed description of the technical content, structural features, and the objects and effects of the technical solutions will be described in detail below with reference to the specific embodiments and the accompanying drawings.

FIG. 13 is a flowchart of a method for operating a touch component for synchronously verifying fingerprint information according to an embodiment of the invention. The method is applied to a device for synchronously operating a touch component for verifying fingerprint information, the device comprising a display unit and a sensing unit. The device is an electronic device with a touch display screen, such as a smart mobile device such as a mobile phone, a tablet computer, a personal digital assistant, or an electronic device such as a personal computer or a computer for industrial equipment.

The display unit is provided with a fingerprint identification area, and the sensing unit is disposed below the fingerprint identification area for acquiring fingerprint information on the fingerprint identification area. The display unit is an active array thin film transistor as a display for scanning driving and transmitting data, including an AMOLED display, an LCD liquid crystal display, a micro light emitting diode display, a quantum dot display, or an electronic ink display.

The method includes the following steps:

First, in step S1301, an operation instruction of the user's finger to the touch component is received, and the fingerprint information corresponding to the user's finger is synchronously collected. The touch component includes text, pictures, video, audio, folders, documents, application icons, and the like. The operation instructions include a slide operation command, a touch operation command, a press operation command, a click operation command, and the like.

In this embodiment, the coverage of the sensing unit is adapted to the size of the touch display screen, so that the sensing unit can capture the user when the user operates the touch component at any position on the screen. Fingerprint information. The user's operation of the touch component on the screen can be done by a single finger or by multiple fingers. When the operation of the touch component on the screen is completed by using multiple fingers, if multiple fingers are located in the fingerprint recognition area during the input operation instruction, the sensing unit performs the fingerprint information corresponding to the fingers. collection.

In other embodiments, the sensing unit may also be multiple, and only needs to satisfy the size that the plurality of sensing units are spliced to fit the display unit and placed under the display unit. Compared with a large-area sensing unit, a small area is easier to produce and process, which is conducive to saving production costs.

In other embodiments, preferably, the fingerprint identification area may also be an area smaller than the size of the display screen, for example, 1/2 or 1/4 of the overall size of the display screen. Preferably, the shape of the fingerprint recognition area is rectangular. The size of the rectangle is located at the center of the display unit, and the size of the sensing unit is adapted to the size of the fingerprint recognition area. In this embodiment, if the user's finger is outside the fingerprint recognition area, the fingerprint information is not recognized because the sensing unit is not set in the area outside the fingerprint identification area; when the user drags or clicks When the touch component moves into the fingerprint recognition area, the sensing unit captures the fingerprint information of the user. Since the sensing unit only occupies part of the area of the display unit, the production cost can be effectively saved compared to the full screen coverage.

In some embodiments, the display unit includes a touch unit; the step of “receiving an operation instruction of the user's finger to the touch component” includes: the sensing unit or the touch unit receiving the sliding track of the user's finger on the touch component , generating sliding track information, and storing the sliding track information. The touch unit may be a touch screen, and the touch screen may be used to sense a touch operation of a user thereon, and the touch operation includes a sliding track operation. The sliding track information and the fingerprint information may both be obtained by the sensing unit, or the sliding track information may be obtained by the touch unit, and the fingerprint information is captured by the sensing unit. In short, for a terminal with a touch screen, the sliding track information is captured by the sensing unit or the touch unit, which effectively improves the application range of the device.

In some embodiments, when the display unit is an LCD liquid crystal display or an electronic ink display, a backlight unit is disposed under the sensing unit, and the sensing unit is disposed on the backlight unit and the LCD liquid crystal display. Between, or between the backlight unit and the electronic ink display. Since the LCD liquid crystal display is not a self-illuminating element, it is necessary to add a backlight unit below the sensing unit during installation. The backlight unit may be an LCD backlight module or other electronic components having a self-luminous function. In other embodiments, when the display unit is an AMOLED display screen, since the OLED display screen is a self-luminous element, there is no need to provide a backlight unit. Through the setting of the above two schemes, the production requirements of different manufacturers can be effectively met, and the applicable range of the terminal can be improved.

In some embodiments, the fingerprint identification area includes a plurality of fingerprint identification sub-areas, and a sensing unit is disposed corresponding to a lower portion of each of the fingerprint identification sub-areas. The device further includes a sensing unit control circuit, the method further comprising: receiving a start instruction of the user for the fingerprint identification sub-area, the sensing unit control circuit turns on the sensing unit below the fingerprint identification sub-area, and receiving the user The sensing unit control circuit closes the sensing unit below the fingerprint identification sub-area for the closing instruction of the fingerprint identification sub-area.

Taking the number of fingerprint recognition areas as two as an example, the two fingerprint identification sub-areas may be evenly distributed on the screen one above or one left or right, or may be distributed in the screen in other arrangements. The following describes the application process of the terminal with two fingerprint identification sub-areas: in the process of using, the user initiates the activation signal, and the photodetection device (ie, the sensing unit) under the two fingerprint recognition sub-areas Both are set to the on state. In a preferred embodiment, the two fingerprint recognition sub-areas are covered by the entire display screen, so that the optical signals entering the display screen when the photodetecting devices under the two fingerprint recognition sub-areas are all set to the on state can be ensured. It can be absorbed by the underlying TFT image sensing array film (ie, the sensing unit) to capture the user's fingerprint information.

In other embodiments, the two fingerprint recognition sub-areas may also constitute a range of 2/3, 3/4, etc. of the entire display screen area. Of course, the user can also set the photodetection device under one of the fingerprint recognition sub-regions to be turned on according to his preference, and the photodetection device under the other fingerprint recognition sub-region is turned off. When the terminal is not required to operate, the photodetecting devices under the two fingerprint identification sub-areas can also be set to the off state. In short, the underside of the photodetection device under each fingerprint recognition sub-area is turned on or off, and can be set according to the user's own preferences.

In some embodiments, the method includes determining whether to execute the operation instruction to the touch component based on the synchronously acquired fingerprint information. Specifically, the method further includes the following steps:

First enter the step to preset the operation configuration information. The operation configuration information includes a correspondence between the operation instruction and the preset fingerprint information. The preset fingerprint information is that the user inputs the stored fingerprint information in advance, and each fingerprint information may correspond to an operation instruction, and each operation instruction may be triggered by one or more fingerprint information. The correspondence between the operation instruction and the preset fingerprint information may be stored in a storage unit of the device, such as a memory of the mobile phone or a hard disk of the computer, or may be stored in a storage unit of the server. When it is required to obtain preset operation configuration information, only The device needs to establish a communication connection with the server, and then obtain the correspondence between the operation instruction and the preset fingerprint information from the server. The communication connection includes a wired communication connection or a wireless communication connection.

After step S1301, the process may proceed to step S1302 to determine whether the fingerprint information corresponding to the synchronously collected user's finger matches the preset fingerprint information. If yes, the process proceeds to step S1303 to execute the operation command, otherwise, the process proceeds to step S1304. The operation instruction is an operation instruction corresponding to the preset fingerprint information in the operation configuration information. The comparison of the fingerprint information can be implemented by a fingerprint identification algorithm, and the fingerprint identification algorithm can be stored in the storage unit of the device. After the sensing unit acquires the fingerprint information on the fingerprint identification area, the processor of the device will call the storage unit. The fingerprint identification algorithm compares the acquired fingerprint information with the preset fingerprint information to determine whether the two match. Fingerprint recognition algorithms include steps such as preprocessing of fingerprint images, data feature extraction, feature matching, fingerprint recognition, etc., which can be implemented by various algorithms. These algorithms are mature existing technologies and have been applied to various encryption and decryption fields. , no longer repeat here.

In some embodiments, the “pre-setting operational configuration information” includes:

First enter the step to receive the user setting command to display the fingerprint identification area. The setting instruction can be triggered by the user clicking a button in the setting column on the terminal screen, and after receiving the setting instruction, the device will display the fingerprint identification area, so that the user can input the fingerprint information. In this embodiment, displaying the fingerprint identification area may include: increasing the brightness of the fingerprint recognition area or displaying a prompt input box on the fingerprint recognition area.

In some embodiments, before receiving the user setting instruction, the method further includes receiving user account information, where the account information includes a user ID and a password. The user needs to input the correct user ID and password, and the setting command can be triggered only after the user account is logged in, so that the security of the fingerprint information setting can be improved on the one hand, and different users can be saved on one device and saved on the other hand. The effect of different fingerprint information.

Then, the process proceeds to obtain the fingerprint information of the user on the fingerprint identification area and save it. When the finger end of the user contacts the fingerprint identification area, the collected fingerprint information is preset fingerprint information, and the collected information is stored in the storage unit. In this embodiment, the device includes a storage unit, and the step of “acquiring fingerprint information of the user on the fingerprint identification area and saving” includes: determining whether fingerprint information in the user setting process has been stored in the storage unit, when When the determination is yes, the user is prompted to enter the fingerprint information; when the determination is no, the fingerprint information is saved to the storage unit. This can effectively avoid repeated entry of fingerprint information.

Then, the step of entering an operation instruction identifier list is received, the user selects a selection instruction for the operation instruction identifier, and the correspondence between the operation instruction corresponding to the selected operation instruction identifier and the acquired fingerprint information is established and saved. The operation instruction identifier list includes identifiers corresponding to one or more operation instructions, and each operation instruction identifier corresponds to an operation instruction. The selection instruction can be triggered by the user clicking a check, double clicking, or the like. In this way, the user can set more important operations (such as payment operations, startup of certain applications, etc.) to require fingerprint information to be executable according to their own needs; and for less important operations, no selection settings are made.

In some embodiments, the method further comprises the step of: issuing a prompt message when the preset fingerprint information matching the acquired fingerprint information is not recognized. The prompt information includes one or more of voice prompt information, image prompt information, light prompt information, and video prompt information. The "pre-identified fingerprint information that matches the acquired fingerprint information" usually includes the following two situations: one is that the fingerprint recognition fails, that is, the fingerprint information is pre-stored in the storage unit, but when the user's fingerprint information is acquired, Because the user's finger end is not fully contacted with the screen, the collected fingerprint information is not very complete, resulting in failure of fingerprint recognition; in another case, the fingerprint information is not stored in the storage unit.

For the first case, when the device does not recognize the preset fingerprint information that matches the acquired fingerprint information, the device may emit an audible prompt message or an image prompt message. The voice prompt information includes voice prompt information prompting the user to input the fingerprint again, and the image prompt information includes pop-up prompt information prompting the user to input the fingerprint again. When the number of times the fingerprint information input by the user is obtained exceeds the preset number of times, and the preset fingerprint information that matches the acquired fingerprint information is not recognized, it is determined that the fingerprint information is not stored in the storage unit, that is, the foregoing Said another situation.

For the second case, the device can also issue image prompt information, for example, the pop-up window prompts the user to input the current fingerprint information; or can send a video prompt information, the video prompt information includes a tutorial on how to input new fingerprint information, the user The new fingerprint information can be entered according to the video prompt information. Of course, the prompt information can also be realized by vibration, light sensation, and the like. In short, the prompt information is only for the user to know the "fingerprint information that does not match the fingerprint information acquired this time" as soon as possible, and the selection of the prompt information form can be adjusted according to the settings of different manufacturers.

In some embodiments, the apparatus includes a storage unit, and the method further includes: storing fingerprint information corresponding to the synchronously collected user finger in the storage unit. After the sensing unit collects the fingerprint information of the user's finger, the comparison of the fingerprint information may not be performed immediately, or it may take some time to extract the call. Preferably, the storage unit is a non-volatile memory, such as a mobile phone memory, a hard disk, a USB flash drive, or the like.

For example, on a shopping website, a product for sale is usually presented in the form of a list of pictures (ie, a touch component). The common practice is as follows: the user can add the selected item to the shopping cart by double clicking or dragging, and then The payment operation of the goods in the shopping cart is completed by the fingerprint unlocking. Since the fingerprint authentication of the payment process and the operation steps of the user selecting the goods are independent of each other, the operation steps of the user's payment process are additionally increased. With the solution of the present application, the terminal can simultaneously collect the user fingerprint information when the user selects the item for sale. For example, if the operation instruction is a pressing instruction, when it is detected that the pressing force of the user's finger on the product image for sale exceeds a preset value, it is regarded as receiving the pressing operation instruction, and the terminal will synchronously collect the user fingerprint information, and the fingerprint information and the preset information are preset. The fingerprint information is compared, and if it is matched, the payment operation is completed, which undoubtedly simplifies the operation steps of the user to purchase the product and improves the user experience.

For example, if a video or document (ie, a touch component) is stored on a mobile phone or a tablet, the user generally does not want to be allowed to view the video or document without authorization, and there is no prevention in the prior art. Other users view the video or document solution, which also affects the user experience. With the solution of the present application, when the user opens a video or a document on the desktop with a finger part (such as double-clicking, touching, pressing a video or a document, etc.), the sensing unit will synchronously collect the fingerprint information of the user, and the collected fingerprint information of the resource. When the preset fingerprint information is matched, the corresponding video or document is opened, thereby effectively improving the security of the desktop file opening and improving the user experience.

As shown in FIG. 1 , the touch display panel includes a cover glass, a touch screen, and a self-light-emitting diode display pixel combination from top to bottom, and a light detecting array film (ie, a sensing unit) can be disposed under the touch display screen, thereby realizing The user's physiological characteristics (such as fingerprint or palm print information) are detected and identified. Taking fingerprint recognition as an example, the structure shown in FIG. 1 has at least the following problems in realizing fingerprint information acquisition: (1) After the display pixel located directly below the finger is irradiated to the finger, light wear occurs on the upper surface of the cover glass. Different optical phenomena such as transparency, light reflection and light scattering, whether it is the convex or concave of the fingerprint, the effective reflected light signal that can form bright and dark is very weak, and it is necessary to distinguish the convex or concave of the fingerprint. (2) limited by the material of the cover glass, touch screen, display screen and other related materials, even if the reflected light signal is strong enough, when passing through the cover glass, touch screen, display screen, reaching the light detection After the array film, the intensity of the light intensity has been seriously weakened (usually cut by more than 95%), and the reflected light signal also undergoes optical distortion in the TFT opening through the display screen, which affects the collection of fingerprint information; (3) Self-emitting diode Each display pixel of the display screen has low illumination collimation, that is, a wide illumination angle, and these large-angle illumination easily interfere with the fingerprint to be irradiated by the adjacent or spaced pixel light source. Collected fingerprint information is not accurate.

In order to solve the problem that the above-mentioned light detecting structure detects physiological characteristic information, the intensity of the reflected light signal entering the light detecting array film is severely cut, resulting in the problem that the captured physiological characteristic information is not clearly distinguished and the information collection is inaccurate, and the present invention A touch component operating device for synchronously verifying fingerprint information is provided, and the device can be applied to detect and identify physiological feature information such as fingerprints, palm prints, and the like.

As shown in FIG. 7, the device includes a cover glass, a touch screen, a self-luminous diode display 2, an optical adhesive 4, an optical device 5, and a photodetecting array film 3 from top to bottom; the touch screen is attached to the cover plate. The lower surface of the glass, the optical adhesive 4 is attached to the lower surface of the self-luminous diode display 2; the refractive index of the optical adhesive 4 is smaller than the refractive index of the cover glass, and the self-emitting diode display includes a plurality of displays Pixel. For ease of explanation, all the drawings of the present invention simplify the cover glass and the touch screen into one body, which is referred to as a cover glass/touch screen 1. When describing the change of the optical path, the change of the optical path on the surface of the cover glass/touch screen 1 is simplified to The change in the light path on the surface of the cover glass.

When the photodetecting array film is disposed under the display structure, by a single display pixel or a display pixel array (which may be a row or a column of display pixels, it may also be a plurality of display pixels arranged periodically or non-periodically) ) As the light source illuminates the fingerprint above the cover glass, the light will reflect. Since the light illuminating the fingerprint ridge is mostly absorbed by the embossed skin, and the air gap between the concave pattern and the cover glass partially reflects the light irradiated to the concave ray, the photosensitive pixel of the light detecting array film can Receiving different light and dark features of the concave and convex fingerprints, the light detecting array film can reconstruct the convex and concave images of the fingerprint according to the light and dark features exhibited by the reflected light signal.

Referring to FIG. 2, the display screen of the present invention is a self-luminous diode display screen. As the name suggests, it is a display screen composed of a self-luminous diode pixel array, such as an organic light emitting diode (OLED) display and a micro-light emitting diode (micro-LED). ) Display screen, etc. The display screen includes MxN display pixels. In order to facilitate detailed description of the optical path change of the optical signal emitted by each display pixel, the present invention records the display pixels of the Nth row and the Mth column on the display screen as Pmn, and other display pixels. Light path changes are equally available. In order to better describe the optical path variation of the display pixel, the thickness of the self-luminous diode display screen of the present invention is less than 1/10 of the thickness of the cover glass, and the refractive index of the display screen and the cover glass are relatively close, thereby calculating the optical path change. When the reflected light signal changes on the surface of the display screen, it is negligible compared to the cover glass to simplify the description.

Please refer to FIG. 3 , which is a schematic diagram of optical path changes of a single display pixel with light reflection reflected according to an embodiment of the invention. Upward in FIG. 3 circles represent the single display pixel Pmn issued a plan view of a cross section smaller than the beam radius R _C of the radius R _C of the light incident angle corresponds to the cover glass surface is [theta] c, a position corresponding to a broken line in FIG. .

Since the refractive index n2 of the cover glass is about 1.5 and the refractive index n1 of the air is about 1.0, when the light source of the (m, n)th display pixel is irradiated upward at a large angle, the incident angle θ of the surface of the cover glass is larger than θc. The light of (θc=sin-1(n1/n2)) will be totally reflected. It is assumed that the projection length of θc corresponding to the circular coordinate r-axis is Rc, and the light outside the dotted circle with the (m, n)th light-emitting display pixel position Pmn as the origin and the radius of Rc is the cover glass. A total reflection of light rays on the upper surface. When a light ray having an incident angle greater than θc on the upper surface of the cover glass is irradiated on the ridge of the fingerprint contacting the upper surface of the cover glass, since the refractive index of the embossed skin has destroyed the condition of the original total reflection, the relative convexity is caused. The reflected signal at the position of the grain cannot be totally reflected in the cover glass, so that the partially reflected light signal enters the light detecting array film through the lower surface of the cover glass to form a bright line. In contrast, due to the air gap between the concave portion of the fingerprint and the cover glass, the reflected light signal at the concave position maintains total reflection, and cannot reach the light detecting array film to form dark lines.

In short, compared with the light ray within the dotted circle of FIG. 3, that is, the light ray having an incident angle greater than θc on the upper surface of the cover glass, it can be used as a fingerprint concave region for detecting an air gap. Therefore, an effective optical display screen fingerprint recognition technology requires Rc as the feature size, and an effective illumination combination to illuminate or scan the finger portion on the cover glass to obtain a highly sensitive reflection area for the fingerprint image. Assuming that the thickness of the touch cover glass is h, Rc = h · tan - 1 (θc).

When the light beam emitted by the light source of the (m, n)th display pixel on the display screen is irradiated upward at a large angle, although the incident angle θ irradiated to the upper surface of the cover glass is larger than the θc ray (θc=sin-1 ( N1/n2)), there will be more accurate total reflection of the fingerprint indentation separated by the air gap, but the incident angle of the cover glass is too large, and the light transmission path of the total reflection back to the photodetecting array film is also It is getting longer and longer, which will cause the useful optical image information to be attenuated more seriously. When this part of the reflected light signal reaches the photodetection array film, it has become a noise interference with no reference value. Therefore, it is also necessary to define a light detection range of the maximum available information when the (m, n)th display pixel is used as a light source to illuminate a fingerprint located above the cover glass.

Referring to FIG. 4 and FIG. 5, since the refractive index of the optical adhesive (n3) is smaller than the refractive index (n2) of the cover glass, the first total reflection occurs on the upper surface of the cover glass (hereinafter referred to as "total reflection". 1") In the light ray entering the surface of the optical adhesive, the ray having an incident angle φ greater than φc will have a second total reflection on the surface of the optical adhesive (hereinafter referred to as "total reflection 2"), φc = sin-1 (n3/n2). It is assumed that the projection length of φc corresponding to the circular coordinate r-axis is Rc'=h·tan-1(φc), and is outside the dotted circle with the (m, n)th display pixel position Pmn as the origin and 2Rc' as the radius. The light is the light ray that can be totally reflected 2 on the surface of the optical glue. For a light ray that can be totally reflected 2 on the surface of the optical adhesive, compared to the light ray within the dotted circle with a radius of 2Rc', since the path of the reflected light signal is too long, there is no high-precision fingerprint. The light ray of the information is thus filtered out by the total reflection 2 of the optical glue having a refractive index of n3 < n2.

4 and FIG. 5, it can be seen that for a single display pixel, a light beam capable of generating total reflection 1 and total reflection 2 among the emitted light beams is an optical signal having higher precision fingerprint information. Based on this, it can be defined that when the fingerprint recognition technology of the screen is implemented, the (m, n) display pixels of the self-luminous diode display screen are used as the light source to illuminate the fingerprint, and the light detection array film can be relatively sensitive. The effective fingerprint area is a dotted concentric annular band beam region having the (m, n)th display pixel position Pmn as the origin and the Rc to 2Rc' range as a radius, and if projected to the circular coordinate r direction, The region range of Rc<r<2Rc' is the most suitable fingerprint optical information that the photodetection array film can obtain from the light source emitted from the single display pixel of the self-luminous diode display screen, as shown in FIG. 6.

For light rays other than the 2Rc' region, as described above, the optical gel of the corresponding refractive index may be used for filtering, that is, the light rays larger than the 2Rc' region are totally reflected on the surface of the optical adhesive without entering the light. The detection of the array film, which in turn affects the collection of fingerprint information images. For light rays smaller than the Rc region, the present invention performs filtering by providing optical devices above the photodetecting array film. In the present embodiment, the optical device 4 includes a light shielding type optical device and a phase change type optical device, and the light shielding type optical device includes a periodic pinhole array or an aperiodic pinhole array, the phase change optical The device includes a photonic crystal structure or a microlens array structure in which the refractive index changes periodically, or a diffuse scattering structure in which the refractive index changes non-periodically.

Preferably, the shape of the pinhole may be a circular hole or a square hole, and the optical device may be obtained by a compression sampling method of a coded aperture. Taking fingerprint recognition as an example, the fingerprint information needs only two lights, light and dark. The application of the order requires the design of the coding aperture of the optical device by filtering the spatial frequency (in this embodiment, specifically, filtering the light ray of the display pixel to the surface of the cover glass θ < θc and θ > φc). For devices with light guiding function, high-resolution light and dark signal extraction in Rc<r<2Rc' region can be realized, and the reflected light signal passing through the optical device can be as perpendicular as possible (incident angle is less than preset) Angle) is injected into the light detection array film. References to the compressed sampling method for coded apertures are as follows: "Coded apertures: past, present, and future application and design," by Stephen R. Gottesman, (Proceeding of SPIE, Vol. 6714, 2007), this article The article uses a simple one-dimensional model to illustrate that the coded aperture can be widely used in the design of thin optics that require high resolution, wide viewing angles. In short, through the compressed sampling method of the coded aperture, the corresponding optical device can be designed according to the predetermined parameter requirement (that is, the optical ray of the r<Rc region is required to be filtered through the optical device), and the specific steps are as follows. The prior art is not described here.

In other embodiments, the optical device can also be designed by digital holography. By digital holography (or holography generated by a calculator), it can be filtered according to predetermined parameters (ie, it is required to filter out r<Rc after passing through the optical device). Regional optical ray) The corresponding optics are designed. The specific steps can be found in the following documents: MASeldowitz, JPAllebach, and DWSweeney, "Synthesis of digital holograms by direct binary search," Appl. Opt. 26, 2788-2798 ( 1987). This paper proposes that a calculator can be used to design a corresponding digital holographic optics with a specific algorithm to achieve a high-resolution output image.

In this embodiment, the device includes a cover glass, a touch screen, a self-luminous diode display, an optical adhesive, an optical device, and a photodetection array film from top to bottom; the touch screen is attached to the lower surface of the cover glass. The optical adhesive is attached to a lower surface of the self-luminous diode display screen; the refractive index of the optical adhesive is smaller than a refractive index of the cover glass, and the self-emitting diode display screen includes a plurality of display pixels; the device further includes a processor; the method comprising the steps of:

First, the process proceeds to step S801 to send a display driving signal to the self-emitting diode display screen when the touch screen detects the touch signal of the user's finger. Taking fingerprint information identification as an example, when the touch screen detects that the user's finger is placed on the upper surface of the cover glass, the touch signal is triggered. In actual use, the user can choose to click or press the touch component on the screen, and the finger must touch the cover glass on the screen to trigger the touch signal.

Then, in step S802, the display pixel emits an optical signal when receiving the display driving signal of the processor, and the optical signal is reflected on the upper surface of the cover glass to form a reflected light signal. Since the display screen and the cover glass have a certain transmittance, the light signal emitted by the display pixel not only reflects on the upper surface of the cover glass, but also transmits, that is, directly penetrates through the upper surface of the cover glass. In the air, only the optical signal reflected on the upper surface of the cover glass finally enters the photodetection array film, thereby forming a corresponding image signal, and thus the present invention performs further screening processing on the reflected light signal.

Then, proceeding to step 803, the optical glue changes the optical path of the reflected light signal, and filters the reflected light signal of the reflected light signal whose incident angle of the optical glue is greater than the first critical angle to obtain a first reflected light signal, and makes the first reflected light signal Enter the optics. The first critical angle is a critical angle at which the reflected light signal can be totally reflected on the surface of the optical glue. In short, it is to filter the optical signal whose light path is too long, that is, the light ray of r>2Rc' region, by the optical glue whose refractive index is smaller than that of the cover glass.

Then, proceeding to step S804, the optical device changes the optical path of the first reflected light signal, and filters the first reflected light signal of the first reflected light signal whose incident angle on the surface of the optical device is less than the first critical angle to obtain a second reflected light signal. And causing the second reflective signal to enter the sensing unit (ie, the light detecting array film) at an incident angle smaller than a preset angle. The second critical angle is a critical angle at which the reflected light signal can be totally reflected on the upper surface of the cover glass. In short, the optical ray of the r<Rc region is filtered by the optical device, and the light passing through the optical device (the corresponding radius r of the light on the coordinate axis satisfies Rc<r<2Rc') is injected into the optical detection as perpendicularly as possible. The array film is measured to increase the luminous flux so that the fingerprint characteristic information is better captured.

Then, proceeding to step S805, the processor generates fingerprint information according to the second reflected light signal received by the light detecting array film and outputs the fingerprint information. That is, for each of the display pixels, the light beam that satisfies the range of Rc<r<2Rc' is extracted, and then the light signals of the respective display pixels in this region are superimposed to reconstruct the complete physiological feature recognition. Image information (such as fingerprint image information) is output.

In some embodiments, the display screen includes MxN display pixels, and the method includes: the processor sequentially driving a single display pixel or a display pixel array on the display screen to emit an optical signal according to a preset timing electrical signal to The upper surface of the glass forms a spot or spot combination to scan the fingerprint feature to form a reflected light signal. For example, the display pixels on the display screen have the first behavior P ₁₁ , P ₁₂ ... P _1N , the second behavior P ₂₁ , P ₂₂ ... P _2N , and so on, and the Nth behavior P _M1 , P _M2 ... P _MN . By presetting the timing electrical signal, the processor can drive the display pixels on the display screen row by row or column by column, or drive the discrete display pixels periodically (such as driving the first row P _{11 ,} P _{13 ,} P _15, then Driving the second row P _21, P _23, P ₂₅ , driving the third row P _{31 ,} P _{33 ,} P ₃₅ , and so on), of course, may also sequentially drive a plurality of display pixels arranged in a non-periodic manner. In short, the order in which the various display pixels on the display screen are illuminated can be selected according to actual needs.

In some embodiments, the photodetecting array film includes PxQ pixel detecting regions, and each pixel detecting region is correspondingly provided with a pixel detecting structure, and each pixel detecting structure includes one or more thin film electrowinning tubes. A set of pixels is used for the pixel thin film circuit and a light detecting unit; the light detecting unit includes a photodiode or a photosensitive photo transistor. For each light detection unit, there are several implementations:

Embodiment 1:

The TFT image sensing array film (ie, the photodetecting array film) is an array formed by photodiodes, and the array formed by the photodiodes includes a photodiode sensing region. Existing liquid crystal display (LCD) panels or organic light emitting diode (OLED) display panels are all driven by a TFT structure to scan a single pixel to realize the display function of the pixel array on the panel. The main structure for forming the TFT switching function is a semiconductor field effect transistor (FET), and the well-known semiconductor layer material mainly includes amorphous silicon, polycrystalline silicon, indium gallium zinc oxide (IGZO), or an organic compound mixed with carbon nano materials. . Since the structure of the light sensing diode can also be prepared by using such a semiconductor material, and the production equipment is also compatible with the production equipment of the TFT array, in recent years, the TFT photodetecting diode (ie, the photodiode) has been produced by the TFT array preparation method. For the specific structure of the existing photodiode, reference may be made to the description of the structure of the photodetecting array film in US Pat. No. 6,943,070 B2 and the patent of CN204808361U. The production process of the TFT image sensing array film is different from that of the display panel TFT in that the pixel opening area of the display panel is changed to the light sensing area in the production process. The TFT can be prepared by using a thin glass substrate or a high temperature resistant plastic material as described in U.S. Patent No. 6,943,070 B2.

The existing TFT image sensing array film is susceptible to reflection or refraction of visible light emitted by ambient light or display pixels, causing optical interference, which seriously affects the TFT image sensing array film embedded under the display panel. Signal-to-Noise Ratio (SNR), in order to improve the signal-to-noise ratio, as shown in FIG. 9, the photodetecting unit of the present invention is further improved, so that the improved TFT image sensing array film can detect and reflect the body part of the user. Infrared signal. The specific structure is as follows:

The photodiode layer includes a p-type semiconductor layer, an i-type semiconductor layer, an n-type semiconductor layer, a p-type semiconductor layer, an i-type semiconductor layer, and an n-type semiconductor layer stacked from top to bottom, and the i-type semiconductor layer is micro A crystalline silicon structure or an amorphous silicon germanium structure. The microcrystalline silicon structure is a semiconductor layer formed by chemical vapor deposition of silane and hydrogen. The crystallinity of the microcrystalline silicon is greater than 40%, and the forbidden band width is less than 1.7 eV. The amorphous silicon germanium structure is an amorphous semiconductor layer formed by chemical vapor deposition of silane, hydrogen and germane, and has a forbidden band width of less than 1.7 eV.

Band gap refers to the width of a band gap (in electron volts (eV)). The energy of electrons in a solid cannot be continuously valued, but some discontinuous energy bands. The existence of free electrons, the energy band in which free electrons exist is called the conduction band (which can conduct electricity). If the bound electrons become free electrons, they must obtain enough energy to jump from the valence band to the conduction band. The minimum value of this energy is the forbidden band width. . The forbidden band width is an important characteristic parameter of the semiconductor, and its size is mainly determined by the band structure of the semiconductor, that is, the crystal structure and the bonding property of the atoms.

At room temperature (300K), the forbidden band width of ruthenium is about 0.66 ev. The silane contains yttrium element. When the yttrium element is doped, the forbidden band width of the i-type semiconductor layer is decreased. When less than 1.7 eV is satisfied, The i-type semiconductor layer can receive optical signals in the wavelength range of visible light to infrared light (or near-infrared light). By adjusting the concentration of GeH4 deposited by chemical weather, the operating wavelength range of a photodiode containing an amorphous or microcrystalline silicon germanium structure can be extended to a wavelength range of 600 nm to 2000 nm.

Embodiment 2:

On the basis of the first embodiment, in order to improve the quantum efficiency of photoelectric conversion, the amorphous silicon photodiode can also be formed by stacking a p-type/i-type/n-type structure with a double junction or more. The first junction p-type/i-type/n-type material of the photodiode is still an amorphous silicon structure, and the p-type/i-type/n-type material above the second junction layer may be a microcrystalline structure, a polycrystalline structure or a doped Compound materials that extend the range of photosensitive wavelengths. In short, a plurality of sets of p-type/i-type/n-type structures can be stacked on top of each other to realize a photodiode structure. For each p-type/i-type/n-type structure, the photodiode structure described in Embodiment 1 is used. .

Embodiment 3:

On the basis of Embodiment 1 or Embodiment 2, for each p-type/i-type/n-type structure, the p-type semiconductor layer included therein may be a multilayer structure of more than two layers. For example, the p-type semiconductor layer has a three-layer structure, and includes a first p-type semiconductor layer (p1 layer), a second p-type semiconductor layer (p2 layer), and a third p-type semiconductor layer (p3 layer) from top to bottom. Among them, the p1 layer can adopt an amorphous structure and is heavily doped with boron (the boron concentration is more than twice that of the standard process); p2 and p3 adopt a microcrystalline structure, and the normal doping boron (doped according to the standard process concentration) depends on The thinned p2 layer and p3 layer reduce the absorption of light, so that the light enters the i layer as much as possible and is absorbed by the i layer, thereby increasing the photoelectric conversion rate; on the other hand, the p2 layer and the p3 layer are doped with normal boron. It is possible to effectively avoid deterioration of the built-in potential due to heavy doping of the p1 layer. When the p-type semiconductor layer includes a multilayer structure which is other layers, it is similar here, and will not be described herein.

Similarly, the n-type semiconductor layer may also be a multilayer structure of more than two layers. For example, the n-type semiconductor layer has a three-layer structure, and includes a first n-type semiconductor layer (n1 layer), a second n-type semiconductor layer (n2 layer), and a third n-type semiconductor layer (n3 layer) from top to bottom. Among them, the n3 layer can adopt an amorphous structure and is heavily doped with phosphorus (the phosphorus content is more than twice that of the standard process); n1 and n2 adopt a microcrystalline structure, and the normal doped phosphorus (according to the standard production process) depends on the thickness reduction The n1 layer and the n2 layer reduce the absorption of light, so that the light enters the i layer as much as possible and is absorbed by the i layer, thereby improving the photoelectric conversion rate; on the other hand, the normal phosphorus doping of the n1 layer and the n2 layer can effectively avoid The built-in potential is degraded due to heavy doping of the n3 layer. When the n-type semiconductor layer includes a multilayer structure which is other layers, it is similar here, and will not be described again here.

Embodiment 4:

The TFT image sensing array film (ie, the photodetecting array film) is an array formed by a photosensitive electroplating tube, and the array formed by the photo transistor comprises a photosensitive electromagnet sensing region, and the photosensitive electromagnet sensing region A photosensitive thin film transistor is provided. As shown in FIG. 10, the photosensitive thin film transistor includes a gate electrode 101, a source electrode 102, a drain electrode 103, an insulating layer 104, and a light absorbing semiconductor layer 105. The photosensitive thin film transistor is an inverted coplanar structure, and the inverted film is common. The planar structure includes: the gate electrode 101, the insulating layer 104, and the source electrode 102 are disposed from the bottom to the top, the drain electrode 103 is laterally coplanar with the source electrode 102, and the insulating layer 104 wraps the gate electrode 101. So that the gate 101 and the source 102, the gate 101 and the drain 103 are not in contact with each other; the gap between the source 102 and the drain 103 is matched, and the source 102 and the drain 103 form a photosensitive leakage current between the lateral direction. The light absorbing semiconductor layer 105 is disposed in the photosensitive leakage current channel.

Generally, when the TFT is operated in the off state by the gate voltage, no current flows between the source and the drain; however, when the TFT is irradiated by the light source, the electron-hole pair is excited by the energy of the light in the semiconductor, and the TFT The field effect of the structure separates the electron-hole pairs, which in turn causes the TFT to generate a photosensitive leakage current. Such photosensitive leakage current characteristics allow the TFT array to be applied to the technology of light detection or light detection. Compared with a device for generally adopting a TFT leakage current as a photosensitive thin film transistor, the present invention arranges a light absorbing semiconductor layer on an uppermost light absorbing layer in an inverted coplanar field effect transistor structure, which greatly increases photoelectron excitation and improves photoelectric conversion efficiency. .

FIG. 12 is a flowchart of a method of fabricating a photodetecting unit according to an embodiment of the present invention. The method is used to prepare the photosensitive thin film transistor (ie, the photodetecting unit) of the sixth embodiment, and specifically includes the following steps:

First, the process proceeds to step S1201 to deposit a gate electrode by magnetron sputtering on the substrate of the pixel thin film transistor. The substrate of the pixel thin film transistor may be a hard plate or a flexible material such as polyimide;

Then proceeding to step S1202, the insulating layer is coated on the upper surface of the gate by chemical vapor deposition or magnetron sputtering;

Then proceeding to step S1203, the n-type doped semiconductor layer of the source and the drain is deposited by chemical vapor deposition over the insulating layer, and the metal layer of the source and the drain is plated by magnetron sputtering, and the yellow light is passed through the yellow light. The etching process defines a source and a drain of the predetermined structure, and the source and the drain are laterally coplanar, and the gap is matched, and a photosensitive leakage current path is formed between the source and the drain;

Then, proceeding to step S1204, a light absorbing semiconductor layer is deposited by chemical vapor deposition in the photosensitive leakage current channel.

Embodiment 5:

In the well-known field effect transistor structure, the TFT as the scan driving and data transfer switch does not need to be specially designed for the structure of collecting photocurrent between the source and the drain; however, the field effect transistor is applied to the detection of the photosensitive leakage current. On the measurement, if the electron-hole pairs excited by the light are separated by the field effect, the drift path driven by the electric field is too long, and it is very likely that the photoelectrons will re-enter the holes before they reach the electrode smoothly. Recombination, or the Dangling Bond defect of the light absorbing semiconductor layer itself, cannot effectively contribute to the photocurrent output for photodetection. In order to improve the photosensitive leakage current, the length of the channel between the source and the drain is affected, so as to increase the absorption of the semiconductor area without deteriorating the photoelectric conversion efficiency, the source and the drain of the fourth embodiment are used in this embodiment. A new step was made to propose a new structure of source and drain.

As shown in FIG. 11, the number of the source and the drain are multiple, the source and the source are connected in parallel with each other, and the drain and the drain are connected in parallel; the gap between the source and the drain is Cooperating, forming a photosensitive leakage current channel between the source and the drain lateral direction includes: forming a first gap between adjacent sources, one drain being disposed in the first gap, and forming a first gap between adjacent drains Two gaps, one source is placed in the second gap, and the source and the drain are staggered and gap-fitted. The distance between each source and the adjacent drain is less than the electron drift distance, which is the distance that the electron can survive under field effect. In this way, in each of the detected pixels, the plurality of sources belonging to the same pixel are connected in parallel, and the plurality of drains belonging to the same pixel are also connected in parallel, which can effectively reduce the probability of recombination of the photoexcited electrons and holes. The successful probability of collecting photoelectrons by the electrodes under the effect of field effect is improved, and the photosensitivity of the TFT leakage current photosensitive thin film transistor is maximized.

In the process of gradually preparing the photosensitive thin film transistor (i.e., photodetecting unit) of the fifth embodiment, the general procedure is similar to that of the photosensitive thin film transistor of the fourth embodiment. The difference is that, in the preparation of the source and the drain, in step S1203, "the source and the drain of the predetermined structure are defined by a yellow etching process, and the source and the drain are laterally coplanar, and the gap is matched, and the source is made. Forming a photosensitive leakage current path between the pole and the drain lateral direction" includes: defining a source electrode group and a drain electrode group by a yellow etching process, each of the source electrode groups including a plurality of sources, a source and a source Parallel to each other; each of the drain electrode groups includes a plurality of drains, and the drain and the drain are connected in parallel with each other; a first gap is formed between adjacent sources, and a drain is disposed in the first gap, A second gap is formed between adjacent drains, one source is disposed in the second gap, and the source and the drain are staggered and gap-fitted.

In some embodiments, the light detecting array film is configured to receive a detection trigger signal, is in a light detecting state, and receives an optical signal reflected by a detecting portion (such as a fingerprint, an eyeball, an iris, etc.) to capture a user's Detecting part information; and receiving a light source trigger signal, in a state of emitting a light source (such as an infrared light source). Preferably, the light source trigger signal and the detection trigger signal are alternately switched and conform to a preset frequency. Taking an array formed by a photodetecting array film as a photodiode as an example, in a practical application, a bias voltage (including a forward bias, or a zero bias or a negative bias) may be applied by a TFT for scanning driving. Between the p-type/i-type/n-type photodiodes, the TFT image sensing array film emits infrared light.

Specifically, a forward bias, or a zero bias or a negative bias, may be alternately applied between the p-type/i-type/n-type infrared photodiodes to trigger the first trigger signal or the second trigger signal. Taking an array of infrared photodiodes with 10 columns of pixel arrays as an example, a forward bias is applied to the p-type/i-type/n-type infrared photodiodes in the first period, so that the 10 columns of pixel lattices are all emitting infrared rays. Light state; applying a zero bias or a negative bias to the p-type/i-type/n-type infrared photodiode in the second period, so that the 10-row pixel lattice is in the infrared light detection state, and is used for capturing the user's eyeball reflection back. Infrared light information, and generate corresponding infrared image output; in the third cycle, the p-type / i-type / n-type infrared photodiode is applied with a forward bias, so that the 10 columns of pixel lattice are in the state of emitting infrared light. Repeat alternately, and so on. Further, the light source trigger signal (ie, the first trigger signal) and the detection trigger signal (ie, the second trigger signal) are alternately switched, and the frequency of the switching conforms to a preset frequency. The time interval between adjacent periods may be set according to actual needs. Preferably, the time interval may be set to a time required for the TFT array to scan and scan each frame of the infrared photodiode array to receive at least one complete image signal. , that is, the preset frequency is switched once every time interval elapsed.

The touch component operation method and device for synchronously verifying fingerprint information according to the above technical solution, the method is applied to a touch component operation device for synchronously verifying fingerprint information, the device includes a display unit and a sensing unit, and the display unit a fingerprint identification area is disposed, the sensing unit is located below the fingerprint identification area, and is used for acquiring fingerprint information on the fingerprint identification area; the display unit is configured to display at least one touch in the fingerprint identification area Component. The method includes the following steps: receiving an operation instruction of a user's finger on the touch component, and synchronously collecting fingerprint information corresponding to the user's finger. The above solution can effectively reduce the operation steps of the user fingerprint collection and improve the user experience.

It should be noted that although the above embodiments have been described herein, the scope of the invention is not limited thereby. Therefore, based on the innovative concept of the present invention, the above technical solutions are directly or indirectly applied to the changes and modifications made to the embodiments described herein, or the equivalent structures or equivalent processes transformed by the contents of the specification and drawings of the present invention. All other related technical fields are included in the scope of patent protection of the present invention.

Claims

A touch component operation method for synchronously verifying fingerprint information, wherein the method is applied to a touch component operation device for synchronously verifying fingerprint information, the device comprising a display unit and a sensing unit, and the display unit is configured a fingerprint identification area, the sensing unit is located below the fingerprint identification area, and is used for acquiring fingerprint information on the fingerprint identification area; the display unit is configured to display at least one touch component in the fingerprint identification area;

The method includes the following steps:

Receiving an operation instruction of the user's finger on the touch component, and synchronously collecting fingerprint information corresponding to the user's finger.
The method of claim 1 , wherein the method further comprises the following steps:

Determining whether to execute the operation instruction of the touch component according to the fingerprint information collected by the synchronization; specifically: determining whether the fingerprint information corresponding to the synchronously collected user finger matches the preset fingerprint information, and if yes, executing the operation instruction, otherwise not executing The operation instruction.
The method for operating a touch component for synchronously verifying fingerprint information according to claim 1, wherein the sensing unit is a light detecting array film, and the light detecting array film comprises PxQ pixel detecting regions, each A pixel detection area is correspondingly disposed with a pixel detection structure, and each of the pixel detection structures includes a set of one or more thin film transistors for the pixel thin film circuit and a light detecting unit; the light detecting unit includes Photodiode or photosensitive transistor.
The method for operating a touch component for synchronously verifying fingerprint information according to claim 3, wherein the photodetecting film is an array formed by photodiodes, and the photodiode comprises a photodiode sensing region, the photodiode A photodiode layer is disposed in the sensing region, and the photodiode layer includes a p-type semiconductor layer, an i-type semiconductor layer, an n-type semiconductor layer, a p-type semiconductor layer, an i-type semiconductor layer, and an n-type semiconductor layer stacked from top to bottom. The i-type semiconductor layer is a microcrystalline silicon structure or an amorphous silicon germanium structure.
The method for operating a touch component for synchronously verifying fingerprint information according to claim 3, wherein the photodetecting film is an array formed by a photosensitive electro-optic transistor, and the photosensitive electro-optic transistor comprises a photosensitive electro-optic transistor a photosensitive thin film transistor is provided with a photosensitive thin film transistor including a gate, a source, a drain, an insulating layer, and a light absorbing semiconductor layer; the photosensitive thin film transistor is an inverted coplanar structure The inverted coplanar structure includes: the gate, the insulating layer, and the source are vertically disposed from the bottom to the top, the drain is laterally coplanar with the source; the insulating layer wraps the gate to The gate is not in contact with the source, the gate and the drain; the gap between the source and the drain is matched, and a photosensitive leakage current path is formed between the source and the drain, and the light absorbing semiconductor layer is disposed on Photosensitive leakage current channel.
The method for operating a touch component for synchronously verifying fingerprint information according to claim 1, wherein the fingerprint identification area comprises a plurality of fingerprint recognition sub-areas, and a sensing unit is disposed under each of the fingerprint identification sub-areas; The method includes:

Receiving a start instruction of the fingerprint recognition sub-area of the user, and opening a sensing unit below the fingerprint identification sub-area;

Alternatively, the user closes the fingerprint recognition sub-area and closes the sensing unit below the fingerprint recognition sub-area.
The method for operating a touch component for synchronously verifying fingerprint information according to claim 1, wherein the display unit is a self-luminous diode display, and the device further comprises a cover glass, a touch screen, an optical glue, and an optical device;

The cover glass, the touch screen, the self-luminous diode display screen, the optical glue, the optical device, and the sensing unit are disposed from top to bottom; the touch screen is attached to the lower surface of the cover glass, and the optical adhesive is attached to the self. a lower surface of the LED display; the refractive index of the optical adhesive is smaller than a refractive index of the cover glass, the self-luminous diode display screen includes a plurality of display pixels; the device further includes a processor;

The fingerprint information corresponding to the synchronously collecting the user's finger includes:

The processor sends a display driving signal to the self-emitting diode display screen when the touch screen detects the touch signal of the user's finger;

The display pixel emits an optical signal when receiving the display driving signal of the processor, and the optical signal is reflected on the upper surface of the cover glass to form a reflected light signal;

The optical glue changes the optical path of the reflected light signal, and filters the reflected light signal of the reflected light signal at an incident angle of the optical glue greater than the first critical angle to obtain a first reflected light signal, and causes the first reflected light signal to enter the optical device; The first critical angle is a critical angle at which a reflected light signal can be totally reflected on the surface of the optical glue;

The optical device changes the optical path of the first reflected light signal, and filters the first reflected light signal of the first reflected light signal whose incident angle on the surface of the optical device is less than the first critical angle to obtain a second reflected light signal, and makes the second The reflective signal enters the access sensing unit at an incident angle less than a preset angle; the second critical angle is a critical angle at which the reflected light signal can be totally reflected on the upper surface of the cover glass;

The processor generates fingerprint information according to the second reflected light signal received by the sensing unit and outputs the fingerprint information.
The method of claim 2, wherein the self-luminous diode display comprises MxN display pixels; the method comprises:

The processor sequentially drives a single display pixel or a display pixel array on the display screen to emit an optical signal according to the preset timing electrical signal, so as to form a light spot or a light spot combination on the upper surface of the cover glass to scan the user's finger portion to form a reflected light signal.
A touch component operating device for synchronously verifying fingerprint information, wherein the device comprises a display unit, a sensing unit, a processor and a computer program, and the display unit is provided with a fingerprint identification area, the sensing unit Located below the fingerprint identification area, for acquiring fingerprint information on the fingerprint identification area; the display unit is configured to display at least one touch component in the fingerprint identification area;

The computer program is executed by the processor to implement the following steps:

Receiving an operation instruction of the user's finger on the touch component, and controlling the sensing unit to synchronously collect the fingerprint information corresponding to the user's finger.
The touch component operating device for synchronously verifying fingerprint information according to claim 9, wherein the display unit is a self-luminous diode display screen, and the device further comprises a cover glass, a touch screen, an optical glue, and an optical device;

The cover glass, the touch screen, the self-luminous diode display screen, the optical glue, the optical device, and the sensing unit are disposed from top to bottom; the touch screen is attached to the lower surface of the cover glass, and the optical adhesive is attached to the self. a lower surface of the LED display; the refractive index of the optical adhesive is smaller than a refractive index of the cover glass, the self-luminous diode display screen includes a plurality of display pixels; the device further includes a processor;

The controlling the sensing unit to synchronously collect the fingerprint information corresponding to the user's finger includes:

The processor sends a display driving signal to the self-emitting diode display screen when the touch screen detects the touch signal of the user's finger;

The display pixel emits an optical signal when receiving the display driving signal of the processor, and the optical signal is reflected on the upper surface of the cover glass to form a reflected light signal;

The optical glue changes the optical path of the reflected light signal, and filters the reflected light signal of the reflected light signal at an incident angle of the optical glue greater than the first critical angle to obtain a first reflected light signal, and causes the first reflected light signal to enter the optical device; The first critical angle is a critical angle at which a reflected light signal can be totally reflected on the surface of the optical glue;

The optical device changes the optical path of the first reflected light signal, and filters the first reflected light signal of the first reflected light signal whose incident angle on the surface of the optical device is less than the first critical angle to obtain a second reflected light signal, and makes the second The reflective signal enters the access sensing unit at an incident angle less than a preset angle; the second critical angle is a critical angle at which the reflected light signal can be totally reflected on the upper surface of the cover glass;

The processor generates fingerprint information according to the second reflected light signal received by the sensing unit and outputs the fingerprint information.