WO2019134060A1

WO2019134060A1 - Thin-film transistor panel having function of in-screen optical fingerprint recognition

Info

Publication number: WO2019134060A1
Application number: PCT/CN2018/000056
Authority: WO
Inventors: 林哲玄; 萧培宏; 萧嘉源; 叶俊宏
Original assignee: 敦捷光电股份有限公司
Priority date: 2018-01-05
Filing date: 2018-01-31
Publication date: 2019-07-11
Also published as: CN108108718A

Abstract

Disclosed is a thin-film transistor panel having the function of in-screen optical fingerprint recognition. A light sensing element (18) for detecting a fingerprint is integrated into the thin-film transistor panel, a fingerprint pressed onto a fingerprint receiving region (122) is sensed by means of the total reflection of directional light rays in a light guide substrate (12), and the light sensing element converts an optical signal into an electrical signal so as to recognize the features of the fingerprint. The light sensing element composed of thin-film transistors is integrated onto a thin-film transistor substrate (16), so that the manufacturing procedure can be simplified, the module volume can be reduced and a relatively large fingerprint touch area can be provided. In addition, before entering the light sensing element, the directional light rays can pass through a specific optical structure so as to adjust an optical path; therefore, under general usage conditions, the influence of direct ambient light or intense light can be minimized so as to ensure the accuracy of fingerprint recognition.

Description

In-screen optical fingerprinting thin film transistor panel

Technical field

The present invention relates to a thin film transistor panel, and more particularly to a thin film transistor panel having optical fingerprint recognition, and optical fingerprint recognition is more integrated in the thin film transistor panel.

Background technique

Biometrics, like all authentication mechanisms, must be able to achieve identity recognition and authentication capabilities by identifying the unique characteristics of the organism to accurately and correctly identify and confirm the correct identity. The most common biometric features include fingerprints, faces. Biometric features such as images, irises, voices, smells, palms, veins, etc., but many of the biometrics are identified, different biometric features require different biometric points, and the methods of judgment are different. For example, when performing iris recognition, at least 240 feature points must be identified. Fingerprint recognition requires only about 50 feature points. In theory, the accuracy of iris recognition should be higher than the accuracy of fingerprints, but because of the need to identify There are many feature points, the cost of the identification module is high, and the use of fingerprints is not fast, convenient and intuitive. Therefore, the evolution and improvement of fingerprint technology is still the focus of relevant biometric technology, and the fingerprint Another advantage of identification is that the fingerprint template is the smallest of all biometrics. In other words, the amount of template information required for a fingerprint is about 120-180 bytes, which makes the fingerprint information easy to store in a limited-capacity terminal device, such as a chip credit card, an e-passport, a chip ID card, etc. Let consumers take their personal information with them.

At present, the fingerprint identification technology in development mainly includes semiconductor type, optical type and ultrasonic type. However, the ultrasonic fingerprint identification technology is still in the initial stage of development, and the technical cost cannot be reduced. Therefore, the fingerprint identification of semiconductor type and optical type is currently the mainstream. technology. Among them, the common application principles of semiconductor fingerprint sensors are RF capacitance sensing, pressure sensing, thermal sensing, etc. The principle is to integrate high-density capacitive sensors or pressure sensors into a chip, in the fingerprint When the surface of the chip is pressed, the internal miniature capacitive sensor forms a fingerprint image based on the different charge amounts (or temperature differences) generated by the aggregation of the peaks and valleys of the fingerprint. The optical fingerprint sensor is the earliest fingerprint acquisition device. The camera uses a light source, a Mitsubishi mirror, and a charge-coupled component camera to form a fingerprint collection device. After the Mitsubishi mirror is pressed by a finger, the peaks and troughs of the fingerprint absorb and destroy the total reflection. A fingerprint image is then captured and output via the camera module, which is the architecture and principle of all optical fingerprint sensors. Since the optical acquisition method is the non-contact chip itself, that is, the fingerprint pressing portion is composed of optical components such as acrylic or glass, the biggest advantage of the optical type is that it is inexpensive and durable, but its disadvantage is that it is bulky. It is difficult to use in handheld devices.

Based on the bottleneck encountered in the prior art, the present invention provides a thin film transistor panel for in-screen optical fingerprint recognition, which can be embedded in a thin film transistor panel, and has a unique light path design to greatly reduce the ambient light source and the strong light source in the fingerprint. Interference when identifying.

Summary of the invention

The main purpose of the present invention is to design a total reflection light path of directional light in a panel to provide an optical signal required for fingerprint recognition, so that fingerprint recognition can be effectively performed in any light interference environment.

A secondary object of the present invention is to integrate a light sensing component on a thin film transistor substrate to effectively reduce and thin the sensing area and thickness of the fingerprint identification for use in various portable electronic products or various thinning Designed on the display.

Another object of the present invention is to provide an optical fingerprinting thin film transistor panel, wherein most of the panel area is used as a fingerprint receiving area of a fingerprint, and the external component is disposed in the secondary display area to realize a full-screen display fingerprint. Identification panel.

In order to achieve the above object and effect, the present invention provides an in-screen optical fingerprinting thin film transistor panel assembled in a backlight module and having a main display area and a sub-display area, and the in-screen optical fingerprint recognition thin film transistor panel of the present invention The invention comprises a light source, a light guiding substrate, a color filter substrate, a thin film transistor substrate and a light sensing component, wherein the light source is used to provide a directional light, and the fingerprint receiving area of the light guiding substrate is used for effective pressing by the finger. The directional light from the light source enters the light guide substrate from the signal introduction area and is totally reflected and generates an optical signal, and finally exits the light guide substrate from the signal lead-out area and enters into the light sensing element to convert the optical signal into electrical The signal is used to complete fingerprint identification of the finger. Since the invention uses the light with specific directivity as the optical signal source for fingerprint recognition, and ensures the transmission efficiency of the optical signal by means of total reflection, the in-screen fingerprint recognition function of the full screen display can be achieved, and at the same time, the light is passed through The sensing element is integrated into the thin film transistor substrate, and the purpose of thinning and reducing the panel can be achieved.

DRAWINGS

FIG. 1 is a schematic cross-sectional view showing a structure of a thin film transistor panel for optical fingerprinting in the screen provided by the present invention.

2 is a schematic cross-sectional view showing another structure of an in-screen optical fingerprinting thin film transistor panel according to the present invention.

3a is a schematic cross-sectional view showing a structure of a thin film transistor panel for in-screen optical fingerprinting provided by the present invention.

FIG. 3b is a schematic cross-sectional view showing a structure of a thin film transistor panel for optical fingerprinting in the screen provided by the present invention.

4a is a schematic cross-sectional view showing a structure of a thin film transistor panel for optical fingerprinting in the screen provided by the present invention.

4b is a schematic cross-sectional view showing a structure of a thin film transistor panel for optical fingerprinting in the screen provided by the present invention.

FIG. 5 is a cross-sectional view showing the structure of a thin film transistor panel for in-screen optical fingerprint recognition according to the present invention.

DESCRIPTION OF REFERENCE NUMERALS: 1a, 1b, 1c, 1d, 1e, 1f, 1g - thin film transistor panel for optical fingerprint recognition in the screen; 12-light guiding substrate; 122-fingerprint receiving area; 124-signal introduction area; 126-signal Lead-out area; 14-color filter substrate; 16-thin film transistor substrate; 18-light sensing element; 22-bevel; 24-first optical structure; 26-second optical structure; 28a, 28b--reflective surface; - main display area; 34-time display area; FG-finger; LS-light source; BL, BL1, BL2-backlight module; PF1, PF2--polarized substrate.

Detailed ways

The technical means and constructions of the present invention are described in detail with reference to the preferred embodiments of the present invention.

First, please refer to FIG. 1 , which is a schematic cross-sectional view of a thin film transistor panel for optical fingerprint recognition in the screen provided by the present invention. The in-screen optical fingerprinting thin film transistor panel 1a has a main display area 32 and a sub-display area 34, and is assembled with a backlight module BL. The in-screen optical fingerprinting thin film transistor panel 1a of the present invention comprises a light source LS and a guide. The optical substrate 12, a color filter substrate 14, a thin film transistor substrate 16, and a light sensing element 18.

The light source LS is used to provide a directional light (shown by a broken line). In the embodiment, the light source LS is a separate structure disposed under the light guide substrate 12, and at least the partial light source LS is in the forward projection direction. It does not overlap with the color filter substrate 14, or the thin film transistor substrate 16, or both, that is, at least a part of the light source LS is completely exposed to the color filter substrate 14, or the thin film transistor substrate 16 in the vertical direction. It can ensure that the directivity light (shown by the dashed line) provided by the light source LS is not obscured by the color filter substrate 14 or the thin film transistor substrate 16 to cause insufficient light energy; in addition, in the independent light source LS aspect, the light source The LS is disposed as close as possible to the sub-display area 34 adjacent to the thin film transistor panel 1a. For example, the light source may be correspondingly disposed in the main display area 32 at a position closer to the sub-display area 34 or correspondingly disposed in the sub-display area 34. The position or the corresponding position set outside the secondary display area 34 (for example, can be hidden in the off-screen area, such as the position of a dead band (not shown)) to reduce the effect on the display. The effect of the present embodiment is described by taking the corresponding display in the sub-display area 34 as an example. At the same time, in order to avoid the influence of ambient light or strong light on the fingerprint recognition of the optical judgment, the directivity generated by the light source is provided by providing directivity light (shown by a broken line) regardless of whether the light source LS is a collimated light source. Light (shown in dashed lines) enters the light guide substrate 12 at a specific angle to distinguish it from light or strong light from the environment, improving the accuracy of fingerprint recognition. The light source LS may be a collimated light source such as, but not limited to, a laser, a vertical cavity surface laser, or the like, and may be other non-collimation sources.

The light guide substrate 12 has a fingerprint receiving area 122, a signal introduction area 124, and a signal lead-out area 126. The fingerprint receiving area 122 may include the entire display area of the thin film transistor panel 1a or a partial display area of the thin film transistor panel 1a, in other words, The fingerprint receiving area 122 may correspond to the main display area 32 of the thin film transistor panel 1a and at least part or all of the sub display area 34, or the fingerprint receiving area 122 may correspond to the main display area 32 of the thin film transistor panel 1a, or the fingerprint receiving area 122. Corresponding only to the main display area 32 of the thin film transistor panel 1a, wherein the main display area 32 is used to display important information such as, but not limited to, main function options, dialog windows, numeric key display areas, etc., and secondary display areas. 34 is used to display less important information such as, but not limited to, time, date, temperature, or even an area that provides only a background image without displaying any information, or an area hidden outside the secondary display area 34 (eg, The position of the dead band is taken as an example, and the fingerprint receiving area 122 includes all The main display area 32 and the partial secondary display area 34. The signal introduction region 124 and the signal lead-out region 126 in the light guiding substrate 12 may be in the form of a mirror surface, a prism film, a grating or an optical fiber.

The color filter substrate 14 and the thin film transistor substrate 16 are sequentially arranged below the light guide substrate 12; the light sensing element 18 is substantially disposed in a light path after the directional light (shown by a broken line) exits the light guide substrate 12. The light sensing component 18 is coupled to at least one of the color filter substrate 14 and the thin film transistor substrate 16. In the embodiment, the photo sensing component 18 is a thin film transistor (TFT) and directly coupled. On the thin film transistor substrate 16.

According to the above configuration, the directivity light (shown by the dashed line) provided by the light source LS enters the light guide substrate 12 from the signal introduction region 124, and is totally reflected inside the light guide substrate 12, when the user's finger FG receives the fingerprint. When the region 122 is pressed, the path of the directional light (shown by the dashed line) is changed and an optical signal is simultaneously generated. When the directional light (shown by the dashed line) exits the light guide substrate 12 from the signal lead-out region 126, Passing through the color filter substrate 14 and entering the light sensing element 18 coupled to the thin film transistor substrate 16, the light sensing element 18 generates a change in voltage by receiving the energy of the directional light (shown by a broken line), and thus The optical signal is converted to an electrical signal, and the fingerprint feature of the user's finger FG is read out via an optical processor (not shown). Since the optical signal processing of the fingerprint feature is not complicated, the required driving lines and operation bytes are not complicated, so that the display processor (not shown) and the touch processor in the thin film transistor substrate 16 can be selectively selected. (not shown) integrated into a single drive circuit. The above optical signal may have a wavelength of 380 to 1400 nanometers (nm), and includes a visible light segment (380 to 780 nm) and a near infrared segment (780 to 1400 nm).

In addition, when the directivity light (shown by the dashed line) provided by the light source LS enters the light guide substrate 12 in a collimated manner, as shown in FIG. 1, the inclined surface 22 or the trench can be designed in the light guide substrate 12. The optical structure is adjusted to adjust the traveling angle of the directional light entering the light guiding substrate 12 (shown by a broken line), and the inclined surface 22 may also be located at the outer edge of the light guiding substrate 12; if the light source LS itself is not a collimated light source, An at least one first optical structure 24 may be disposed between the light source LS and the light guiding substrate 12. As shown in FIG. 2, the thin film transistor panel 1b of the present aspect includes a first optical structure 24, which is mainly used to The directional light of the light source LS (shown in dashed lines) is adjusted to be collimated light before entering the light guide substrate 12, and the first optical structure 24 may be an optical element, a secondary element, an optical microstructure, and combinations thereof. For example, the first optical structure 24 can be, for example, a combination of a parabolic concentrating mirror, a compound parabolic concentrating mirror, a lens, a Fresnel lens, a grating, a prism, and the like. The first optical structure 24 can be a separate structure, or integrated in the light source LS, or integrated in the light guide substrate 12, in this aspect being shown as a separate first optical structure 24. Of course, the directional light (shown by the dashed line) shown in FIG. 2 can also adjust the traveling angle in the light guiding substrate 12 by the design of the inclined surface 22 after entering the light guiding substrate 12.

Please refer to FIG. 3a , which is a schematic cross-sectional view of another in-screen optical fingerprinting thin film transistor panel provided by the present invention. In this embodiment, the light source is replaced by the backlight module BL in the thin film transistor panel 1c, that is, an area using the edge of the backlight module BL or a region for providing the backlight module BL of the secondary display or the non-display to provide a pointing. Light (shown in dashed lines), while the backlight module BL in the central area is still used to provide backlight to the thin film transistor panel 1c for display; light from the backlight module BL (shown in dashed lines) passes through optical components such as a light guide plate and a brightness enhancement film. After that, it enters the thin film transistor substrate 16 almost vertically, and after passing through the second optical structure 26 which can change the optical path, enters the light guiding substrate 12 in a specific direction, and the second optical structure 26 can be integrated into the color filter substrate. 14 and one of the light guiding substrate 12, the embodiment is illustrated as being integrated under the light guiding substrate 16, and the type and type of the second optical structure 26 may be an optical element or a secondary element. Optical microstructures and combinations of the above.

In FIG. 3b, another embodiment in which the light source is replaced by a backlight module is provided. In the embodiment, the backlight modules BL1 and BL2 are divided into two parts, and a part of the backlight module BL1 is for providing light to the thin film transistor panel. 1d backlight, another part of the backlight module BL2 provides directing light (shown in dashed lines) to the light guiding substrate 12, so that the angle of illumination of the backlight module BL2 for providing directional light (shown in dashed lines) Adjusted to a specific angle, as shown in the figure, the angle of illumination of the BL2 can be controlled by the

reflective surface

28a, 28b or the light guiding design, and the specific angle is not the angle of illumination of the backlight module BL1 for providing light to the thin film transistor panel 16. Must be the same. Similar to the above, the directional light (shown by the dashed line) from the backlight module BL2 can selectively pass through the structure on the glass if it cannot completely reach the light transmission that is totally reflected after being incident on the light guiding substrate. The arrangement of the second optical structure (not shown) to effectively adjust the directional light (shown by the dashed line) can finally be incident on the light guide substrate 12 to achieve the total reflection transmission in the light guide substrate 12. . The second optical structure described herein may be a stand-alone structure or integrated into at least one of the color filter substrate 14 and the light guide substrate 12. In order to avoid affecting the display effect of the thin film transistor panel 16, the backlight module BL2 for providing directional light (shown by a broken line) may be correspondingly disposed in the main display area 32 but close to the sub display area 34 or correspondingly disposed in the sub display area 34. Or correspondingly disposed in an area other than the sub-display area 34, for example, a part or all of the backlight module BL2 may be hidden at a position of a dead band, and the backlight module BL1 used to provide backlight to the thin film transistor panel 1d is still effective. The light for display is provided, in particular the provision of backlight light on the main display area 32.

In the aspects disclosed in FIG. 3a and FIG. 3b, the backlights are replaced by the backlight modules BL and BL2, so that the thinned thin

film transistor panels

1c and 1d can enhance the internal space under the premise of reducing the use of components. Utilization to make a more efficient combination of component configurations.

Please refer to FIG. 4a and FIG. 4b successively, which respectively provide the aspect of the on-screen optical fingerprinting thin film transistor panel of two different light sensing elements. First, the light sensing elements 18 in the thin film transistor panel 1e provided in FIG. 4a are separately disposed and located above the color filter substrate 14, and the light sensing element 18 is coupled to the color filter substrate 14 or the film. The transistor substrate 16 is provided in the thin film transistor panel 1f of FIG. 4b. The light sensing component 18 is also disposed independently between the color filter substrate 14 and the thin film transistor substrate 16, and the light sensing component 18 is coupled. The color filter substrate 14 or the thin film transistor substrate 16 is used.

Please refer to FIG. 5, which illustrates another embodiment of the in-screen optical fingerprinting thin film transistor panel of the present invention. In the thin film transistor panel 1g of the present embodiment, two color polarizing substrates PF1 and PF2 are disposed on the outer side of the color filter substrate 14 and the thin film transistor substrate 16, and the light guiding substrate 12 and the color filter substrate 14 are interposed therebetween. The polarizing substrate PF1 can be integrated with the light guiding substrate 12 into a single structure, that is, the light guiding substrate 12 itself can have a polarizing effect.

In summary, the in-screen optical fingerprinting thin film transistor panel according to the present invention integrates the photodetecting component that detects the fingerprint into the thin film transistor panel, and through the total reflection of the directional light in the light guiding substrate, Inductively pressing the fingerprint in the fingerprint receiving area, and converting the optical signal into an electrical signal through the light sensing component to distinguish the characteristics of the fingerprint, in particular, the light sensing component formed by the thin film transistor can be integrated on the thin film transistor substrate Therefore, the process can be simplified and the module size can be reduced, but a relatively large fingerprint touch area can be provided. In addition, since the directional light can be adjusted by a specific optical structure before entering the light sensing element, the influence of the direct light or the strong light of the environment can be minimized in the case of general use to ensure the fingerprint. The accuracy of the identification. In actual use, the in-screen optical fingerprinting LED panel provided by the present invention can be applied to various screen-equipped devices such as mobile devices, screens, televisions, etc., since the LED panel of the present invention has considerable fingerprint receiving. In the area, the fingerprint can be easily identified by the user without being too deliberate. Whether it is a wake-up device or identification, the user's use of fingerprint protection function is enhanced because of the convenience of use. In the case where the fingerprint recognition is set on the side surface or the back surface of the device, the LED panel for optical fingerprint recognition provided by the present invention can make the mechanism of fingerprint protection more effective.

The above is only the preferred embodiment of the present invention and is not intended to limit the scope of the present invention. All changes or modifications of the features and spirits of the inventions are intended to be included within the scope of the invention.

Claims

A thin film transistor panel for in-screen optical fingerprint recognition is assembled in a backlight module and has a main display area and a primary display area, and the thin film transistor panel of the optical fingerprint recognition in the screen is provided for fingerprint recognition by a finger, and is characterized in that :

a light source that provides a directional light;

a light guiding substrate having at least one fingerprint receiving area, a signal introducing area and a signal lead-out area, wherein the fingerprint receiving area is for the finger to perform effective pressing, and the directional light from the light source enters from the signal introducing area Directing the light guide substrate and performing total reflection therein, and generating an optical signal when the finger is pressed against the fingerprint receiving area, and leaving the light guide substrate from the signal lead-out area;

a color filter substrate disposed under the light guide substrate;

a thin film transistor substrate disposed under the color filter substrate;

An optical sensing component is disposed on the light path of the directional light that is away from the light guiding substrate, and the light sensing component is coupled to at least one of the color filter substrate and the thin film transistor substrate, the light sensing component After receiving the optical signal leaving the light guiding substrate, the optical signal is converted into an electrical signal to identify a fingerprint feature of the finger.
The in-screen optical fingerprinting thin film transistor panel of claim 1 , wherein the light source and the backlight module are independent light source structures.
The in-screen optical fingerprinting thin film transistor panel of claim 2, wherein the light source is disposed under the light guiding substrate, and at least part of the light source does not overlap the color filter in a right projection direction. The substrate and the thin film transistor substrate are at least one of them.
The in-screen optical fingerprinting thin film transistor panel of claim 2, wherein the light source is a collimating light source.
The in-screen optical fingerprinting thin film transistor panel of claim 2, wherein the light source is a non-collimated light source.
The on-screen optical fingerprinting thin film transistor panel of claim 2, wherein the light source is correspondingly disposed in the main display area but closer to the sub-display area, or correspondingly located in the sub-display area, or Correspondingly located outside the display area.
The on-screen optical fingerprinting thin film transistor panel of claim 2, wherein at least one first optical structure is disposed between the light source and the light guiding substrate, and the directional light provided by the light source passes through the first An optical structure then collimates into the signal introduction region of the light guiding substrate.
The in-screen optical fingerprinting thin film transistor panel of claim 7, wherein the first optical structure is an optical element, a secondary element, an optical microstructure, and combinations thereof.
The in-screen optical fingerprinting thin film transistor panel of claim 7, wherein the first optical structure is an independent structure.
The in-screen optical fingerprinting thin film transistor panel of claim 7, wherein the first optical structure is integrated with the light source or the light guiding substrate.
The in-screen optical fingerprinting thin film transistor panel of claim 1 , wherein at least a portion of the backlight module is configured to provide the directional light, and the remaining backlight module is configured to provide a display backlight.
The in-screen optical fingerprinting thin film transistor panel of claim 11 , wherein the backlight module that provides the directional light is a collimated light source.
The in-screen optical fingerprinting thin film transistor panel of claim 11 , wherein the backlight module that provides the directional light is a non-collimated light source.
The in-screen optical fingerprinting thin film transistor panel of claim 11 , wherein the backlight module for providing a portion of the directional light has the same illumination angle as the remaining backlight module that provides a display backlight.
The in-screen optical fingerprinting thin film transistor panel of claim 11 , wherein the backlight module for providing a portion of the directional light has a different illumination angle than the remaining backlight module that provides a display backlight.
The in-screen optical fingerprinting thin film transistor panel of claim 11, wherein at least one second optical structure is disposed between the backlight module for providing a portion of the directional light and the light guiding substrate, The directional light provided by the partial backlight module passes through the second optical structure and collimates into the signal introduction region of the light guiding substrate.
The in-screen optical fingerprinting thin film transistor panel of claim 11 , wherein the backlight module for providing a local portion of the directional light is correspondingly disposed in the main display area but closer to the sub-display area Or correspondingly located in the secondary display area, or correspondingly outside the secondary display area.
The in-screen optical fingerprinting thin film transistor panel of claim 17, wherein the second optical structure is an optical element, a secondary element, an optical microstructure, and combinations thereof.
The in-screen optical fingerprinting thin film transistor panel of claim 17, wherein the second optical structure is a separate structure.
The on-screen optical fingerprinting thin film transistor panel of claim 17 , wherein the second optical structure is integrated into at least one of the color filter substrate and the light guide substrate.
The in-screen optical fingerprinting thin film transistor panel of claim 1 , wherein the fingerprint receiving area is all or a partial area of the light guiding substrate.
The in-screen optical fingerprinting thin film transistor panel according to claim 1, wherein the signal introduction region and the signal lead-out region are in the form of a mirror surface, a prism film, a grating or an optical fiber.
The on-screen optical fingerprinting thin film transistor panel of claim 1 , wherein a polarizing substrate is interposed between the light guiding substrate and the color filter substrate, or the light guiding substrate is further integrated on the polarizing substrate. .
The in-screen optical fingerprinting thin film transistor panel of claim 1 , wherein the light sensing component is independently disposed and located above the color filter substrate, and the light sensing component is coupled to the color filter A light substrate or the thin film transistor substrate.
The in-screen optical fingerprinting thin film transistor panel of claim 1 , wherein the light sensing component is independently disposed between the color filter substrate and the thin film transistor substrate, and the light sensing component is coupled Connected to the color filter substrate or the thin film transistor substrate.
The in-screen optical fingerprinting thin film transistor panel of claim 1 , wherein the light sensing component is integrated on the thin film transistor substrate.
The in-screen optical fingerprinting thin film transistor panel of claim 26, wherein the photo sensing element is a thin film transistor.
The in-screen optical fingerprinting thin film transistor panel of claim 1 , wherein a signal amplifying component is further disposed between the light guiding substrate and the light sensing component.
The in-screen optical fingerprinting thin film transistor panel of claim 28, wherein the signal amplifying element is an optical element, an optical microstructure, and a combination thereof.
The on-screen optical fingerprinting thin film transistor panel of claim 28, wherein the signal amplifying component is further integrated into at least one of the light guiding substrate and the color filter substrate.
The in-screen optical fingerprinting thin film transistor panel of claim 1 , wherein the optical signal and the electrical signal are further processed by an optical processor to recognize and identify the fingerprint feature of the finger.
The in-screen optical fingerprinting thin film transistor panel of claim 31, wherein the optical processor is further integrated into a display processor of the optical fingerprinting thin film transistor panel of the screen or the optical processor is more integrated On a touch processor.