TWI782629B - Fingerprint sensing display apparatus - Google Patents

Abstract

A fingerprint sensing display apparatus has a plurality of display pixel areas and a sensing pixel area and includes a substrate, a light shielding structure layer, a photosensitive device, a first electrode and a second electrode. The light shielding layer has a plurality of first openings defining the display pixel areas and a second opening defining the sensing pixel area. The photosensitive device is disposed between the substrate and the light shielding layer and overlaps the second opening. The first electrode and the second electrodes are disposed between the photosensitive device and the light shielding layer. Each of the second electrodes or the first electrode has a plurality of slits located in the display pixel areas. One of the second electrodes overlapping the second opening and the first electrode are fully disposed in the sensing pixel area.

Description

Fingerprint Sensing Display Device

The present invention relates to a display device, and in particular to a fingerprint sensing display device.

In order to increase the screen-to-body ratio of the display panel, under-display fingerprint sensing technology has become a trend. To put it simply, the under-display fingerprint sensing technology integrates the light sensing element with the touch display panel of the electronic device or arranges it under the touch display panel. After the electronic device detects that the user touches the touch display panel, the electronic device controls the touch display panel to emit light to illuminate the surface of the user's finger. The light can be reflected by the user's finger into the light sensing element in the touch display panel, and the light sensing element converts the reflected light into a digital image signal to obtain the fingerprint image of the user. However, during the display period of the touch display panel, part of the display light will leak out through the photo-sensing area, resulting in unexpected brightness changes and color shifting.

The invention provides a fingerprint sensing display device, which has better color saturation.

The fingerprint sensing display device of the present invention has a plurality of display pixel areas and sensing pixel areas. The fingerprint sensing and display device includes a substrate, a light-shielding structure layer, a photosensitive element, a first electrode and a second electrode. The light-shielding structure layer has a plurality of first openings defining the display pixel areas and second openings defining the sensing pixel areas. The photosensitive element is arranged between the substrate and the light-shielding structure layer, and overlaps the second opening. The first electrode and the plurality of second electrodes are arranged between the photosensitive element and the light-shielding structure layer. Each second electrode or first electrode has a plurality of gaps in these display pixel areas. One of the second electrodes overlapping the second opening and the first electrode are integrally arranged in the sensing pixel area.

In an embodiment of the present invention, the above-mentioned fingerprint sensing display device further includes a display medium layer, which is overlapped and arranged in a plurality of display pixel regions and sensing pixel regions. The first electrode and the plurality of second electrodes are located between the display medium layer and the photosensitive element.

In an embodiment of the present invention, the first electrodes of the above-mentioned fingerprint sensing display device are located between the substrate and each second electrode, and each second electrode has a plurality of gaps in a plurality of display pixel regions.

In an embodiment of the present invention, the plurality of second electrodes of the above-mentioned fingerprint sensing display device are located between the substrate and the first electrodes, and the first electrodes have a plurality of gaps in the plurality of display pixel regions.

In an embodiment of the present invention, the above-mentioned fingerprint sensing and display device further includes an alignment structure layer disposed between the photosensitive element and the light-shielding structure layer, and has an opening overlapping the photosensitive element.

In an embodiment of the present invention, the above-mentioned fingerprint sensing and display device further includes a sensing signal line and a switch element. The switch element is electrically connected between the sensing signal line and the photosensitive element. The collimation structure layer and the sensing signal line are the same film layer.

In an embodiment of the present invention, the opening area of the opening of the alignment structure layer of the above-mentioned fingerprint sensing display device is smaller than the opening area of the second opening of the light-shielding structure layer.

In an embodiment of the present invention, the above-mentioned fingerprint sensing and display device further includes a cut-off filter layer disposed on a side of the photosensitive element away from the substrate and overlapping the second opening of the light-shielding structure layer. The light transmittance of the cut-off filter layer is less than or equal to 3% for light with a wavelength greater than or equal to 600nm.

In an embodiment of the present invention, the above-mentioned fingerprint sensing and display device further includes a color filter layer having a plurality of first color filter patterns and a second color filter pattern. The first color filter patterns are respectively overlapped and disposed on the plurality of first openings. The second color filter pattern is overlapped on the second opening.

In an embodiment of the present invention, the photosensitive element of the above-mentioned fingerprint sensing and display device includes a photoelectric conversion layer, a first conductive layer and a second conductive layer. The first conductive layer and the second conductive layer are respectively disposed on opposite sides of the photoelectric conversion layer, and are electrically connected to the photoelectric conversion layer. The contact area between the first conductive layer closer to the light-shielding structure layer and the photoelectric conversion layer is smaller than the opening area of the second opening of the light-shielding structure layer.

In an embodiment of the present invention, the electrode area of the portion of the plurality of second electrodes of the above-mentioned fingerprint sensing and display device that does not overlap the second opening does not overlap any of the first openings is larger than that of the second opening. The area of the opening is equal to the electrode area of the portion of the second electrodes that does not overlap any of the first openings.

Based on the above, in the fingerprint sensing display device according to an embodiment of the present invention, the plurality of display pixel regions are provided with a plurality of second electrodes and first electrodes. The parts where the second electrodes and the first electrodes overlap the sensing pixel area are all arranged in the sensing pixel area. Accordingly, the light leakage phenomenon in the sensing pixel area of the fingerprint sensing display device can be effectively suppressed, which helps to improve the color gamut performance of the fingerprint sensing display device.

As used herein, "about," "approximately," "essentially," or "essentially" includes the stated value and averages within acceptable deviations from the particular value as determined by one of ordinary skill in the art, taking into account the The measurement in question and the specific amount of error associated with the measurement (ie, the limitations of the measurement system). For example, "about" can mean within one or more standard deviations of the stated value, or for example within ±30%, ±20%, ±15%, ±10%, ±5%. Furthermore, "about", "approximately", "essentially" or "substantially" used herein can choose a more acceptable deviation range or standard deviation according to the nature of measurement, cutting or other properties, and can be Not one standard deviation applies to all properties.

In the drawings, the thickness of layers, films, panels, regions, etc., are exaggerated for clarity. It will be understood that when an element such as a layer, film, region, or substrate is referred to as being "on" or "connected to" another element, it can be directly on or connected to the other element, or Intermediate elements may also be present. In contrast, when an element is referred to as being "directly on" or "directly connected to" another element, there are no intervening elements present. As used herein, "connected" may refer to physical and/or electrical connection. Furthermore, "electrically connected" may mean that other elements exist between two elements.

Reference will now be made in detail to the exemplary embodiments of the present invention, examples of which are illustrated in the accompanying drawings. Wherever possible, the same reference numbers are used in the drawings and descriptions to refer to the same or like parts.

FIG. 1 is a schematic top view of a fingerprint sensing and display device according to a first embodiment of the present invention. FIG. 2 is a schematic cross-sectional view of the fingerprint sensing and display device shown in FIG. 1 . FIG. 3 is a schematic circuit diagram of the fingerprint sensing and display device shown in FIG. 1 . Fig. 2 corresponds to the section line A-A' of Fig. 1 . Referring to FIG. 1 to FIG. 3 , the fingerprint sensing display device 10 has a plurality of display pixel areas DPA and a plurality of sensing pixel areas SPA. In this embodiment, these display pixel areas DPA can be arranged in multiple columns and rows along the direction X and direction Y, and are used to display images, for example: these display pixel areas DPA can respectively emit images of different colors beam.

It should be noted that every three display pixel areas DPA will be adjacent to a sensing pixel area SPA, for example: the sensing pixel area SPA and one of the display pixel areas DPA can be arranged along the direction Y, but This is not the limit. In other embodiments, the proportion relationship between the display pixel area DPA and the sensing pixel area SPA can be adjusted according to actual application requirements, for example: every five display pixel areas are adjacent to two sensing pixel areas SPA, one sensing pixel area SPA is adjacent to every six display pixel areas, or two sensing pixel areas SPA are adjacent to every three display pixel areas DPA.

The fingerprint sensing and display device 10 includes a substrate 101 , a substrate 102 , a pixel driving layer 110 , a light-shielding structure layer 120 , a plurality of pixel structures PX and a plurality of photosensitive elements 130 . The substrate 101 is opposite to the substrate 102 . The materials of the two substrates may include glass, quartz, high molecular polymer (such as polycarbonate, polyimide), or other suitable transparent plates. The pixel driving layer 110 is disposed on the surface of the substrate 101 facing the substrate 102 , and is electrically connected to the pixel structures PX and the photosensitive elements 130 . The light-shielding structure layer 120 is disposed on the surface of the substrate 102 facing the substrate 101 , and has a plurality of first openings OP1 defining a plurality of display pixel areas DPA and a plurality of second openings OP2 defining a plurality of sensing pixel areas SPA.

A plurality of pixel structures PX are disposed on the substrate 101 and respectively located in the display pixel areas DPA. A plurality of photosensitive elements 130 are disposed between the substrate 101 and the light-shielding structure layer 120 , and are respectively located in the sensing pixel areas SPA. That is to say, the pixel structures PX are respectively overlapped with the plurality of first openings OP1 of the light shielding structure layer 120 , and the photosensitive elements 130 are respectively disposed overlapping with the plurality of second openings OP2 of the light shielding structure layer 120 . It should be noted that the "overlapping arrangement" mentioned here refers to the overlapping relationship of two components along one direction. If not specified, this direction is, for example, the direction Z in the accompanying drawings, and will not be described in detail below.

In detail, the pixel structure PX includes a first electrode E1 , a second electrode (such as the second electrode E2 a or the second electrode E2 b ) and a switching element Td. In this embodiment, the first electrode E1 may be a common electrode, and is disposed entirely in the plurality of display pixel areas DPA and the plurality of sensing pixel areas SPA. The second electrode may be a pixel electrode. The first electrode E1 and the second electrode are disposed between the photosensitive element 130 and the light shielding structure layer 120 . In this embodiment, the first electrode E1 of the pixel structure PX is disposed between the second electrode and the photosensitive element 130 (or the substrate 101 ), but it is not limited thereto. The switching element Td may be a thin film transistor (thin film transistor, TFT), for example: an amorphous silicon (a-Si) thin film transistor, a polycrystalline silicon thin film transistor (polycrystalline silicon, poly-Si), or a metal oxide (metal oxide) thin film transistor, but not limited thereto.

In this embodiment, the pixel driving layer 110 is provided with a plurality of signal lines, such as a plurality of first scan lines GL1 , a plurality of second scan lines GL2 , a plurality of display data lines DL, and a plurality of sensing signal lines SL. Although not specifically shown, these signal lines may be disposed in areas other than the plurality of display pixel areas DPA and the plurality of sensing pixel areas SPA (ie, overlapping the light-shielding structure layer 120 ). For example, the switch element Td of each pixel structure PX is electrically connected to a corresponding first scan line GL1 , a corresponding display data line DL and the second electrode.

The fingerprint sensing display device 10 further includes a display medium layer 200 . The display medium layer 200 is disposed between the pixel driving layer 110 and the light-shielding structure layer 120 , and overlaps the plurality of display pixel areas DPA and the plurality of sensing pixel areas SPA. The first electrode E1 and the second electrode of the pixel structure PX are located between the display medium layer 200 and the photosensitive element 130 . In this embodiment, the display medium layer 200 may include a plurality of liquid crystal molecules (not shown). That is, the display medium layer 200 may be a liquid crystal layer. The fingerprint sensing display device 10 can individually control the potentials of the respective second electrodes of these pixel structures PX via a plurality of first scan lines GL1, a plurality of display data lines DL and a plurality of switching elements Td during display, so that A corresponding electric field is generated between the first electrode E1 and the second electrode. The electric field can drive the liquid crystal molecules of the liquid crystal layer to rotate to modulate the polarization state of light passing through the liquid crystal layer. Therefore, through the polarizer P1 and the polarizer P2 arranged on the substrate 101 and the substrate 102, the light can be sequentially passed through the polarizer P1, the display medium layer 200 and the polarizer P2 from the display pixel area with the corresponding light intensity. DPA shoots out to achieve the displayed effect.

In order to achieve the effect of color display, a color filter layer 140 is also provided in the plurality of display pixel areas DPA. For example, the color filter layer 140 includes a plurality of color filter patterns, and these color filter patterns are respectively arranged in a plurality of first openings OP1 of the light-shielding structure layer 120, and are respectively suitable for letting light of different colors (such as red light, green light and blue light) through, but not limited to. In order to increase the film thickness uniformity of the display medium layer 200 , the color filter layer 140 and the light-shielding structure layer 120 are also covered with a cladding layer 170 . The material of the cladding layer 170 includes inorganic materials (for example: silicon oxide, silicon nitride, silicon oxynitride, other suitable materials, or a stacked layer of at least two of the above materials), organic materials, or other suitable materials, or the above-mentioned combination.

It should be understood that, since the fingerprint sensing display device 10 of this embodiment is a non-self-illuminating display device, a backlight module for providing illumination light needs to be provided on one side of the substrate 101 of the fingerprint sensing display device 10. Group. During the display period, the illumination light forms an image frame after passing through the plurality of display pixel areas DPA of the fingerprint sensing display device 10 . During fingerprint recognition, the illuminating light emitted from the first opening OP1 (that is, the display pixel area DPA) can pass through the second opening OP2 of the light-shielding structure layer 120 through (diffuse) reflection on the surface of the object (such as a finger) pressing the substrate 102 Afterwards, it is transferred to the photosensitive element 130 . In order to allow illumination light to pass through, the first electrode E1 and the second electrode of the pixel structure PX are, for example, light-transmitting electrodes, and the material of the light-transmitting electrodes may include indium tin oxide, indium zinc oxide, aluminum tin oxide , aluminum zinc oxide, or other suitable oxides, extremely thin metals, carbon nanotubes, graphene, or a stacked layer of at least two of the above.

Further, the second electrode of the pixel structure PX has a first portion overlapping the first opening OP1 (or the display pixel area DPA) and a second portion overlapping the light shielding structure layer 120 . It should be noted that, in this embodiment, the second electrode of the pixel structure PX can have two configurations. For example, both the first part E2a1 and the second part E2a2 of the second electrode E2a of the pixel structure PXa have a plurality of slits SLT, but not limited thereto. The first portion E2b1 of the second electrode E2b of the pixel structure PXb has a plurality of slits SLT, while the second portion E2b2 of the second electrode E2b does not have a plurality of slits SLT.

More specifically, one side of the pixel structure PXb in the direction Y is adjacent to the sensing pixel area SPA, and the second electrode E2b of the pixel structure PXb extends from the pixel display area DPA to the sensing pixel area SPA . In order to prevent the liquid crystal molecules in the sensing pixel area SPA from changing the polarization state of light too much during the display period, the second part E2b2 of the second electrode E2b of the pixel structure PXb and the first electrode E1 are both on the entire surface is selectively arranged in the sensing pixel area SPA, so as to effectively suppress the second electrode E2b from generating a horizontal electric field in the sensing pixel area SPA.

Therefore, even during the display period, part of the light in the display pixel area DPA passes through the multi-film layers between the two substrates (such as the substrate 101, the substrate 102, the pixel driving layer 110, the cladding layer 170 and the display medium layer 200). The interface reflection or refraction transmits to the sensing pixel area SPA, and exits from the second opening OP2. These light rays have no significant difference after passing through the part of the liquid crystal layer overlapping with the second part E2b2 of the second electrode E2b due to their polarization state. The change is absorbed by the polarizer P2. In other words, it is possible to avoid the light leakage phenomenon caused by the unintended light emitted from the sensing pixel area SPA during the display period, resulting in a decrease in the saturation of the displayed color.

On the other hand, the photosensitive element 130 includes a first conductive layer 131 , a second conductive layer 132 and a photoelectric conversion layer 133 . The two conductive layers are respectively disposed on opposite sides of the photoelectric conversion layer 133 and are electrically connected to the photoelectric conversion layer 133 . For example, the pixel driving layer 110 can also be provided with a switching element Ts for driving the photosensitive element 130, and the switching element Ts is electrically connected to the first conductive layer 131 or the second conductive layer 132 of the photosensitive element 130, and a corresponding one of the photosensitive elements. The signal line SL and a corresponding second scan line GL2 are measured. The fingerprint sensing display device 10 can respectively receive sensing signals from the plurality of photosensitive elements 130 through the plurality of second scan lines GL2 , the plurality of sensing signal lines SL and the plurality of switching elements Ts during fingerprint identification. The sensing signal here is, for example, an electrical signal generated by the photosensitive element 130 after receiving image light from the surface of the fingerprint, but is not limited thereto. The switching element Ts may be a thin film transistor (thin film transistor, TFT), for example: an amorphous silicon (a-Si) thin film transistor, a polycrystalline silicon thin film transistor (polycrystalline silicon, poly-Si), or a metal oxide (metal oxide) thin film transistor, but not limited thereto.

In this embodiment, the first conductive layer 131 is, for example, a light-transmitting electrode, and the material of the light-transmitting electrode may include indium tin oxide, indium zinc oxide, aluminum tin oxide, aluminum zinc oxide, or other Suitable oxides, ultra-thin metals, carbon nanotubes, graphene or stacked layers of at least two of the above. In order to increase the photoelectric conversion efficiency of the photoelectric element 130, the second conductive layer 132 can be a reflective electrode, and the material of the reflective electrode can include metal, alloy, nitride of metal material, oxide of metal material, oxynitride of metal material , or other suitable materials, or stacked layers of metal materials and other conductive materials, but not limited thereto. In other embodiments, the second conductive layer 132 may also be a light-transmitting electrode.

In order to increase the clarity of fingerprint recognition, the fingerprint sensing and display device 10 may further include an alignment structure layer 150 disposed between the photosensitive element 130 and the light-shielding structure layer 120 . In this embodiment, the alignment structure layer 150 is disposed on the substrate 101 and has an opening 150 a overlapping the photosensitive element 130 . It should be noted that the opening area of the opening 150 a of the alignment structure layer 150 is smaller than the opening area of the second opening OP2 of the light shielding structure layer 120 . The second opening OP2 of the light-shielding structure layer 120 and the opening 150 a of the collimating structure layer 150 can define a light-receiving range RR of the photosensitive element 130 . Therefore, the photosensitive element 130 cannot receive stray light outside the light receiving range RR.

In this embodiment, the alignment structure layer 150 can be integrated in the pixel driving layer 110 . For example, the alignment structure layer 150 and the sensing signal line SL can optionally be the same film layer. That is to say, the material of the collimation structure layer 150 and the sensing signal line SL can be the same. However, the present invention is not limited thereto. In other embodiments, the alignment structure layer 150 and the display data line DL can also be the same film layer.

It should be noted that, in this embodiment, both the light-shielding structure layer 120 and the alignment structure layer 150 are exemplarily described as a single layer, which does not mean that the present invention is limited by the contents disclosed in the drawings. In other embodiments, the alignment structure layer 150 can also be formed by stacking a plurality of light-shielding layers with a specific pitch, and can be selectively disposed on the other side of the display medium layer 200 , for example, disposed on the substrate 102 .

Some other embodiments will be listed below to describe the present disclosure in detail, wherein the same components will be marked with the same symbols, and the description of the same technical content will be omitted.

4 is a schematic cross-sectional view of a fingerprint sensing and display device according to a second embodiment of the present invention. Please refer to FIG. 4 , the difference between the fingerprint sensing and display device 10A of this embodiment and the fingerprint sensing and display device 10 of FIG. 2 is that the fingerprint sensing and display device 10A does not have the alignment structure layer 150 of FIG. 2 . Therefore, in order to obtain substantially the same light receiving range RR, the pixel driving layer 110A of the fingerprint sensing display device 10A has an insulating layer 115 between the first conductive layer 131A and the photoelectric conversion layer 133 of the photosensitive element 130A.

It should be noted that the insulating layer 115 has an opening 115 a overlapping the photoelectric conversion layer 133 , and the opening area of the opening 115 a is smaller than the opening area of the second opening OP2 of the light-shielding structure layer 120 . More specifically, the opening 115 a of the insulating layer 115 and the second opening OP2 of the light-shielding structure layer 120 can define the light receiving range RR of the photosensitive element 130A. From another point of view, since the opening 115a of the insulating layer 115 only exposes part of the surface of the photoelectric conversion layer 133, the contact area between the first conductive layer 131A and the photoelectric conversion layer 133 is obviously smaller than that of the first conductive layer 131 and the first conductive layer 131 in FIG. The contact area of the photoelectric conversion layer 133 . Therefore, the effective photosensitive area of the photosensitive element 130A in this embodiment is defined by the opening 115 a of the insulating layer 115 .

Since the configuration relationship of other components in FIG. 4 and the technical effects that can be obtained are similar to the fingerprint sensing and display device 10 in FIG. 2 , please refer to the relevant paragraphs of the above-mentioned embodiments for detailed description, and will not be repeated here.

FIG. 5 is a schematic top view of a fingerprint sensing and display device according to a third embodiment of the present invention. Please refer to FIG. 5, the difference between the fingerprint sensing display device 10B of this embodiment and the fingerprint sensing display device 10 of FIG. The configuration of the second electrode E2b of structure PXb is the same. In this embodiment, the electrode area of the portion of the plurality of second electrodes of the fingerprint sensing display device 10B that does not overlap the second opening OP2 and that does not overlap any first opening OP1 is substantially equal to these second electrodes. The electrode area of the part overlapping the second opening OP2 and the other not overlapping any first opening OP1 is larger than the opening area of the second opening OP2.

Specifically, the second portion E2a2" of the second electrode E2a" that does not overlap the sensing pixel area SPA is similar to the second portion E2b2 of the second electrode E2b overlapping the sensing pixel area SPA, and does not have a gap SLT. That is to say, the second part E2a2" of the second electrode E2a" is completely disposed in the area blocked by the light-shielding structure layer 120 (ie, the area other than the display pixel area DPA and the sensing pixel area SPA). Accordingly, the commonality of photomasks for different product designs can be increased, which helps reduce production costs.

Since the configuration relationship of other components in FIG. 5 and the technical effects that can be obtained are similar to the fingerprint sensing and display device 10 in FIG. 1 , please refer to the relevant paragraphs of the above-mentioned embodiments for detailed description, and will not be repeated here.

FIG. 6 is a schematic cross-sectional view of a fingerprint sensing and display device according to a fourth embodiment of the present invention. Please refer to FIG. 6 , the difference between the fingerprint sensing and display device 10C of this embodiment and the fingerprint sensing and display device 10 in FIG. The cut-off filter layer 142 inside the opening OP2. The cut-off filter layer 142 has a transmittance of less than or equal to 3% for light with a wavelength greater than 600 nm. Accordingly, when the fingerprint sensing and display device 10C is operated in a place with strong external ambient light (such as under the sun), external light transmitted through the finger and received by the photosensitive element 130 can be avoided, resulting in a decrease in the accuracy of fingerprint identification. In other words, the arrangement of the cut-off filter layer 142 can not only improve the accuracy of fingerprint recognition, but also increase the adaptability of the fingerprint sensing and display device 10C to different operating environments.

In particular, in this embodiment, the cut-off filter layer 142 may be formed by the color filter pattern of the color filter layer 140 . For example, the color filter layer 140 may include a first color filter pattern overlapping the first opening OP1 and a second color filter pattern overlapping the second opening OP2. Each of the first color filter pattern and the second color filter pattern may be a red filter pattern, a green filter pattern or a blue filter pattern. In addition, the second color filter pattern set in a part of the sensing pixel area SPA may also be different from the second color filter pattern set in another part of the sensing pixel area SPA, but not limited thereto.

Since the configuration relationship of other components in FIG. 6 and the technical effects that can be obtained are similar to the fingerprint sensing and display device 10 in FIG. 2 , please refer to the relevant paragraphs of the foregoing embodiments for detailed description, and will not be repeated here.

FIG. 7 is a schematic top view of a fingerprint sensing and display device according to a fifth embodiment of the present invention. FIG. 8 is a schematic cross-sectional view of the fingerprint sensing and display device shown in FIG. 7 . Fig. 8 corresponds to the section line B-B' of Fig. 7 . Please refer to FIG. 7 and FIG. 8 , the difference between the fingerprint sensing display device 20 of this embodiment and the fingerprint sensing display device 10 of FIG. 1 and FIG. 2 lies in that the arrangement of the first electrode and the second electrode of the pixel structure is different .

Specifically, the second electrode E2 f of the pixel structure PX-A of the fingerprint sensing display device 20 is disposed between the first electrode E1 -A and the photosensitive element 130 (or the substrate 101 ). The first electrode E1-A has a plurality of slits SLT-A in each display pixel area DPA. The second electrode E2f of the pixel structure PX-A adjacent to the photosensitive element 130 is disposed entirely in the corresponding display pixel area DPA and the corresponding sensing pixel area SPA. Similar to the fingerprint sensing display device 10B in FIG. 5 , in this embodiment, the pixel structure PX-A is not adjacent to the sensing pixel area SPA, and its second electrode E2f is adjacent to the pixel structure PX-A that is adjacent to the photosensitive element 130. The configuration of the second electrode E2f of the prime structure PX-A is the same. Accordingly, the commonality of photomasks for different product designs can be increased, which helps reduce production costs.

Since the arrangement relationship of other components in Fig. 7 and Fig. 8 and the technical effect that can be obtained are similar to the fingerprint sensing and display device 10 in Fig. 1 and Fig. 2, please refer to the relevant paragraphs of the foregoing embodiments for detailed description, hereby No longer.

To sum up, in the fingerprint sensing display device according to an embodiment of the present invention, a plurality of display pixel regions are provided with a plurality of second electrodes and first electrodes. The parts where the second electrodes and the first electrodes overlap the sensing pixel area are all arranged in the sensing pixel area. Accordingly, the light leakage phenomenon in the sensing pixel area of the fingerprint sensing display device can be effectively suppressed, which helps to improve the color gamut performance of the fingerprint sensing display device.

10, 10A, 10B, 10C, 20: Fingerprint sensing and display devices 101, 102: Substrate 110, 110A: pixel driver layer 115: insulation layer 115a: opening 120: shading structure layer 130, 130A: photosensitive element 131, 131A: the first conductive layer 132: second conductive layer 133: photoelectric conversion layer 140: Color filter layer 142: cut-off filter layer 150: collimation structure layer 150a: opening 170: cladding layer 200: display medium layer DL: display data line DPA: display pixel area E1, E1-A: the first electrode E2a, E2a", E2b, E2f: second electrodes E2a1, E2b1: Part 1 E2a2, E2a2", E2b2: Part Two GL1, GL2: scan line OP1: first opening OP2: second opening PX, PXa, PXa", PXb, PX-A: pixel structure P1, P2: Polarizer RR: Receiving Range SL: Sensing signal line SLT, SLT-A: Gap SPA: Sensing Pixel Area Td, Ts: switching element X, Y, Z: direction A-A', B-B': section line

FIG. 1 is a schematic top view of a fingerprint sensing and display device according to a first embodiment of the present invention. FIG. 2 is a schematic cross-sectional view of the fingerprint sensing and display device shown in FIG. 1 . FIG. 3 is a schematic circuit diagram of the fingerprint sensing and display device shown in FIG. 1 . 4 is a schematic cross-sectional view of a fingerprint sensing and display device according to a second embodiment of the present invention. FIG. 5 is a schematic top view of a fingerprint sensing and display device according to a third embodiment of the present invention. FIG. 6 is a schematic cross-sectional view of a fingerprint sensing and display device according to a fourth embodiment of the present invention. FIG. 7 is a schematic top view of a fingerprint sensing and display device according to a fifth embodiment of the present invention. FIG. 8 is a schematic cross-sectional view of the fingerprint sensing and display device shown in FIG. 7 .

10: Fingerprint sensing display device

120: shading structure layer

130: photosensitive element

DPA: display pixel area

E1: first electrode

E2a, E2b: second electrode

E2a1, E2b1: Part 1

E2a2, E2b2: Part Two

OP1: first opening

OP2: second opening

PX, PXa, PXb: pixel structure

SLT: gap

SPA: Sensing Pixel Area

X, Y, Z: direction

A-A': section line

Claims (11)

A fingerprint sensing display device has a plurality of display pixel areas and a sensing pixel area, the fingerprint sensing display device includes: a substrate; An opening and a second opening defining the sensing pixel area; a photosensitive element disposed between the substrate and the light-shielding structure layer and overlapping the second opening; and a first electrode and a plurality of second The electrodes are arranged between the photosensitive element and the light-shielding structure layer, and each of the second electrodes or the first electrodes has a plurality of gaps in the display pixel areas, wherein the second electrodes overlap the second One of the openings is integrally arranged with the first electrode in the sensing pixel area. The fingerprint sensing display device as described in Claim 1, further comprising: a display medium layer overlapping the display pixel area and the sensing pixel area, wherein the first electrode and the second electrodes are located Between the display medium layer and the photosensitive element. The fingerprint sensing display device according to claim 1, wherein the first electrode is located between the substrate and each of the second electrodes, and each of the second electrodes has the gaps in the display pixel regions . The fingerprint sensing display device according to claim 1, wherein the second electrodes are located between the substrate and the first electrode, and the first electrode has the gaps in the display pixel regions. The fingerprint sensing display device as claimed in claim 1 further includes an alignment structure layer disposed between the photosensitive element and the light-shielding structure layer, and has an opening overlapping the photosensitive element. The fingerprint sensing display device as described in claim 5, further comprising: a sensing signal line; and a switch element electrically connected between the sensing signal line and the photosensitive element, wherein the alignment structure layer and The sensing signal lines are of the same film layer. The fingerprint sensing display device as claimed in claim 5, wherein the opening area of the alignment structure layer is smaller than the opening area of the second opening of the light-shielding structure layer. The fingerprint sensing display device as described in Claim 1, further comprising: a cut-off filter layer, disposed on the side of the photosensitive element away from the substrate, and overlapping the second opening of the light-shielding structure layer, the cut-off filter layer The optical layer has a light transmittance of less than or equal to 3% for light with a wavelength greater than or equal to 600nm. The fingerprint sensing display device as claimed in claim 1, further comprising: a color filter layer having a plurality of first color filter patterns and a second color filter pattern, and the first color filter patterns overlap respectively Disposed on the first openings, the second color filter pattern is overlapped on the second openings. The fingerprint sensing display device as claimed in item 1, wherein the photosensitive element includes: a photoelectric conversion layer; and a first conductive layer and a second conductive layer, respectively arranged on the photoelectric conversion layer The opposite sides are electrically connected to the photoelectric conversion layer, wherein the contact area between the first conductive layer closer to the light-shielding structure layer and the photoelectric conversion layer is smaller than the opening area of the second opening of the light-shielding structure layer. The fingerprint sensing display device as claimed in item 1, wherein the second electrodes are respectively arranged to overlap the first openings, and the other of the second electrodes does not overlap the second openings, and each of the second electrodes The electrode areas of the parts of the two electrodes not overlapping the first openings are equal to each other and larger than the opening area of the second openings.

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