TWI736991B - Display apparatus with fingerprint identification function - Google Patents

Abstract

The present disclosure relates to a display apparatus with a fingerprint identification function. The display apparatus includes a first cover, a display module, and an fingerprint identification module. The first cover defines a display region and a non-display region. The display region further defines a fingerprint identification region. The display module displays images. The fingerprint identification module is located between the first cover and the display module. The fingerprint identification module includes a first substrate, a touch unit, and a fingerprint identification unit. The touch unit and the fingerprint identification unit are located on the same first substrate located between the first cover and the display module. The touch unit is in the display region, and surrounds the fingerprint identification unit. The touch unit senses touch operations in the display region of the first cover. The fingerprint identification unit is in the fingerprint identification region, and identifies fingerprints on the first cover.

Description

Display device with fingerprint identification function

The invention relates to a display device with fingerprint identification function.

In the conventional technology, since the fingerprint is inherently invariable, unique and convenient for life, the display device can improve the privacy protection of the display device by using the fingerprint recognition technology as an unlocking method. The fingerprint recognition module is usually an independent module set in the non-display area of the display device, for example, located under the HOME button under the display device. The display device designed based on the above method cannot realize a narrow bezel or a full-screen design.

In view of this, it is necessary to provide a display device with a fingerprint recognition function that can realize a narrow frame.

A display device with fingerprint recognition function, comprising: a first cover plate, the first cover plate defines a display area and a non-display area set around the display area; the display area further defines a fingerprint recognition area A display module for displaying images; a fingerprint recognition module, located between the first cover and the display module; the fingerprint recognition module includes a first substrate, a touch unit, a fingerprint recognition unit And a control unit; the first substrate is disposed between the first cover and the display module, the touch unit and the fingerprint The identification unit is arranged on the same first substrate; the touch unit is located in the display area and is arranged around the fingerprint identification unit; the touch unit is used to sense that the user is on the first cover Touch operation in the above display area; the fingerprint identification unit is arranged in the fingerprint identification area and is used to identify the fingerprint on the first cover; the fingerprint identification unit further includes a plurality of switch elements; The fingerprint recognition electrode is electrically connected to the control unit through the corresponding switch element; the control terminal of the switch element is electrically connected to the control unit through a third metal wire, and the second A connection terminal is electrically connected to the control unit through a fourth metal wire, and the second connection terminal of the switch element is electrically connected to the corresponding fingerprint recognition electrode; the fingerprint recognition electrode in the same row is electrically connected to the same One of the third metal wires is electrically connected, and the fingerprint identification electrodes in the same column are electrically connected to the same fourth metal wire.

The above-mentioned display device with fingerprint recognition function can realize a narrow frame design by arranging the fingerprint recognition unit in the display area.

1, 1a, 1b, 1c, 1d, 1e: display device

11: Display area

13: Non-display area

15: Fingerprint recognition area

10: The first cover

20, 20a, 20b, 20c, 20d, 20e, 20f: fingerprint recognition module

30: second cover

40: display module

50: The first bonding layer

60: second bonding layer

21: The first substrate

22: Touch unit

23: Fingerprint recognition unit

24: control unit

25: second substrate

26: The first auxiliary unit

27: The second auxiliary unit

28: The first circuit board

42: The first polarizer

43: color filter

45: Thin film transistor substrate

46: second polarizer

48: second circuit board

221: touch electrode

223: The first metal wire

224: first via

231: Fingerprint recognition electrode

232: second via

234: second metal wire

236: switching element

237: The third metal wire

238: The fourth metal wire

261: First auxiliary electrode

271: second auxiliary electrode

FIG. 1 is a three-dimensional schematic diagram of a display device according to a preferred embodiment of the present invention.

2 is a schematic cross-sectional view of the display device of the first embodiment in FIG. 1 along the II-II direction.

3 is a schematic plan view and a partially enlarged schematic view of the fingerprint identification module of the first embodiment in FIG. 2.

4 is a schematic plan view and a partially enlarged schematic view of the fingerprint identification module of the second embodiment in FIG. 2.

5 is a schematic plan view and a partially enlarged schematic view of the fingerprint identification module of the third embodiment in FIG. 2.

6 is a schematic cross-sectional view of the display device of the second embodiment in FIG. 1 along the II-II direction.

FIG. 7 is a schematic plan view and a partially enlarged schematic view of the fingerprint identification module in FIG. 6.

FIG. 8 is a schematic cross-sectional view of the display device of the third embodiment in FIG. 1 along the II-II direction.

FIG. 9 is a schematic plan view and a partially enlarged schematic view of the fingerprint identification module in FIG. 8.

10 is a schematic cross-sectional view of the display device of the fourth embodiment in FIG. 1 along the II-II direction.

FIG. 11 is a schematic plan view and a partially enlarged schematic view of the second substrate in FIG. 10.

12 is a schematic cross-sectional view of the display device of the fifth embodiment in FIG. 1 along the II-II direction.

In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be described clearly and completely in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only It is a part of the embodiments of the present invention, but not all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

In the description of the embodiments of the present invention, it should be noted that, unless otherwise clearly defined and limited, the term "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection. ; It can be a mechanical connection, an electrical connection, or a mutual communication; it can be a direct connection, or an indirect connection without an intermediate connection, it can be a connection between two components or an interaction relationship between two components. For those of ordinary skill in the art, the specific meaning of the above-mentioned terms in the present invention can be immediately determined according to the specific situation.

The terms "first", "second", and "third" in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order. In addition, the term "including" and any variations of them are intended to cover non-exclusive inclusion.

The specific implementation of the display device of the present invention will be described below with reference to the accompanying drawings.

Please refer to FIG. 1, which is a schematic diagram of a module of a display device 1 with fingerprint identification function according to an embodiment of the present invention. In this embodiment, the display device 1 may be a handheld display device with a fingerprint recognition function, such as a mobile phone, a tablet computer, and a handheld game console. In other embodiments, the display device 1 may be a display with a fingerprint recognition function. The display device 1 is generally designed in a plate shape, and defines a display area 11 and a non-display area 13 arranged around the display area 11.

Please also refer to FIG. 2, which is a schematic cross-sectional view of the display device 1 a of the first embodiment along II-II. A fingerprint recognition area 15 is further defined in the display area 11 (as shown in FIG. 3). Wherein, the area of the fingerprint identification area 15 is smaller than the area of the display area 11. In this embodiment, the fingerprint recognition area 15 is centrally arranged at the bottom of the display area 11. The display device 1 a includes a first cover 10, a fingerprint recognition module 20, a second cover 30, and a display module 40 that are stacked. The thickness of the first cover 10, the fingerprint identification module 20, and the second cover 30 is 0.7 millimeters (mm).

The first cover 10 and the second cover 30 are made of transparent materials and used to prevent impurities such as dust from entering the interior of the display device 1a. In this embodiment, the first cover plate 10 and the second cover plate 30 may be glass substrates, or other transparent substrates with high strength and high hardness, such as polycarbonate (PC), polyester (Polythylene terephthalate, PET), polymethylmethacrylate (PMMA), cyclic olefin copolymer (Cyclic Olefin Copolymer, COC) or polyether sulfone (PES) and other materials. The second cover 30 is located between the fingerprint identification module 20 and the display module 40. In this implementation In the formula, the thickness of the first cover plate 10 and the second cover plate 30 are both 0.175 mm. A light-shielding layer 17 is provided on the inner surface of the first cover plate 10 opposite to the fingerprint identification module 20. The light-shielding layer 17 is disposed in the non-display area 15 and is made of opaque material.

Please also refer to FIG. 3, which is a schematic plan view and a partially enlarged schematic view of the fingerprint identification module 20 a of the first embodiment in FIG. 2. The fingerprint identification module 20a is used to sense a user's touch operation in the display area 11 on the first cover 10, and to identify the user in the fingerprint recognition area 15 on the first cover 10 Fingerprint inside. The fingerprint identification module 20 a is disposed between the first cover 10 and the second cover 30. The fingerprint recognition module 20a is bonded to the first cover plate 10 by a first adhesive layer 50, and is bonded to the second cover plate 30 by a second adhesive layer 60. Wherein, the thickness of the first adhesive layer 50 and the thickness of the second adhesive layer 60 are 0.075 mm. In this embodiment, the thickness of the fingerprint identification module 20a is 0.245 mm. The fingerprint recognition module 20 a includes a first substrate 21, a touch unit 22, a fingerprint recognition unit 23, a control unit 24 and a first circuit board 28. Wherein, the touch unit 22 and the fingerprint identification unit 23 are both disposed on the first substrate 21 and located in the display area 11. The fingerprint identification unit 23 is further arranged in the fingerprint identification area 15.

The first substrate 21 is made of transparent material. In this embodiment, the first substrate 21 may be a glass substrate, or other transparent substrates with high strength and high hardness, such as polycarbonate (PC), polyester (Polythylene terephthalate, PET), and polyester. It is made of polymethylmethacrylate (PMMA), Cyclic Olefin Copolymer (COC) or Polyether sulfone (PES) and other materials. Wherein, the thickness of the first substrate 21 is 0.2 mm.

The touch unit 22 is disposed on the first substrate 21. The touch unit 22 is used to sense a user's touch operation in the display area 11 on the first cover 10. The touch unit 22 includes a plurality of touch electrodes 221 arranged in a matrix. The touch electrode 221 is disposed on the It is arranged in the display area 11 and around the fingerprint recognition area 15. That is, there is no touch electrode 221 in the fingerprint recognition area 15. The touch electrode 221 is electrically connected to the first metal wire 223 through a plurality of first via holes 224. The first metal wire 223 establishes an electrical connection between the touch electrode 221 and the control unit 24 in the non-display area 13. The first metal wires 223 are arranged in parallel along the first direction Y. The touch electrodes 221 constitute a self-capacitive touch sensing structure. In this embodiment, the touch electrode 221 is approximately square, and the side length of the touch electrode 221 ranges from 4-5 mm. The touch electrode 221 and the fingerprint recognition area 15 are arranged in the same area. For example, when the size of the touch electrode 221 is 4mm*4mm, the size of the fingerprint recognition area 15 is also 4mm*4mm.

The fingerprint identification unit 23 is disposed on the first substrate 21 and located in the fingerprint identification area 15. The fingerprint identification unit 23 is used to identify a user's fingerprint in the fingerprint identification area 15 on the first cover 10. In this embodiment, the fingerprint recognition unit 23 is a capacitive fingerprint reader, which includes a plurality of fingerprint recognition electrodes 231 arranged in a matrix. The fingerprint recognition electrode 231 is electrically connected to the second metal wire 234 through a plurality of second via holes 232. The second metal wire 234 establishes an electrical connection between the fingerprint identification electrode 231 and the control unit 24 located in the non-display area 13. The second metal wires 234 are arranged in parallel along the first direction Y. In this embodiment, the fingerprint recognition electrode 231 is approximately square, and the side length of the fingerprint recognition electrode 231 ranges from 50 to 60 μm. For example, when the size of the touch electrode 221 is 4mm*4mm and the size of the fingerprint identification electrode 231 is 50μm*50μm, that is, the fingerprint identification electrode 231 with an area of 2500μm2 is arranged in an area of 16000000μm2, The number of fingerprint identification electrodes 231 is 16000000/2500=6400, that is, the number of second metal conductive wires 234 is 6,400.

The control unit 24 is used to drive the touch unit 22 and the fingerprint identification unit 23. The control unit 24 is disposed on the first substrate 21 and located in the non-display area 13.

The first circuit board 28 is configured to be disposed on the first substrate 21 and used to electrically connect the control unit 24 with a motherboard (not shown). The first circuit board 28 is located in the non-display area 13. In this embodiment, the first circuit board 28 may be a flexible circuit board.

The display module 40 is used for displaying images. The display module 40 is bonded to the surface of the second cover 30 opposite to the touch module 20 by the second adhesive layer 60. The display module 40 includes a first polarizer 42, a color filter 43, a thin film transistor substrate 45, a second polarizer 46, and a second circuit board 48 that are stacked.

The first polarizer 42 is disposed between the second cover 30 and the color filter 43. The color filter 43 is disposed between the first polarizer 42 and the thin film transistor substrate 45. The thin film transistor substrate 45 is disposed between the color filter 43 and the second polarizer 46. The thin film transistor substrate 45 is a thin film transistor substrate on which a plurality of thin film transistors are arranged. The thin film transistor substrate 45 may be a glass substrate, or other transparent substrates with high strength and high hardness, such as polycarbonate (PC), polyester (Polythylene terephthalate, PET), polymethylmethacrylate ( Polymethylmethacrylate (PMMA), Cyclic Olefin Copolymer (COC) or Polyether sulfone (PES) and other materials. The second circuit board 48 is disposed on the thin film transistor substrate 45 and is used to electrically connect the thin film transistor substrate 45 and a motherboard (not shown). In this embodiment, the second circuit board 48 may be a flexible circuit board.

The above-mentioned display device 1a with fingerprint recognition function, by integrating the fingerprint recognition unit 23 and the touch unit 22 and then disposed on the first substrate 21, and further disposed in the display area 11, Realize a narrow bezel design. At the same time, by setting the second cover 30 The high strength of the fingerprint identification module 20 prevents the fingerprint identification module 20 from being damaged during the assembly process and use.

Please refer to FIG. 4, which is a schematic plan view and a partially enlarged schematic view of the fingerprint identification module 20b of the second embodiment in FIG. The fingerprint identification module 20b is used to sense the user's touch operation in the display area 11 on the first cover 10, and to identify the user in the fingerprint recognition area 15 on the first cover 10 Fingerprint inside. The fingerprint identification module 20b is arranged between the first cover 10 and the second cover 30. The fingerprint recognition module 20b is bonded to the first cover plate 10 by a first adhesive layer 50, and is bonded to the second cover plate 30 by a second adhesive layer 60. Wherein, the thickness of the first adhesive layer 50 and the thickness of the second adhesive layer 60 are 0.075 mm. In this embodiment, the thickness of the fingerprint identification module 20b is 0.245 mm. The fingerprint recognition module 20 b includes a first substrate 21, a touch unit 22, a fingerprint recognition unit 23, a control unit 24 and a first circuit board 28. Wherein, the touch unit 22 and the fingerprint identification unit 23 are both disposed on the first substrate 21 and located in the display area 11. The fingerprint identification unit 23 is further arranged in the fingerprint identification area 15.

The first substrate 21 is made of transparent material. In this embodiment, the first substrate 21 may be a glass substrate, or other transparent substrates with high strength and high hardness, such as polycarbonate (PC), polyester (Polythylene terephthalate, PET), and polyester. It is made of polymethylmethacrylate (PMMA), Cyclic Olefin Copolymer (COC) or Polyether sulfone (PES) and other materials. Wherein, the thickness of the first substrate 21 is 0.2 mm.

The touch unit 22 is disposed on the first substrate 21. The touch unit 22 is used to sense a user's touch operation in the display area 11 on the first cover 10. The touch unit 22 includes a plurality of touch electrodes 221 arranged in a matrix. The touch electrodes 221 are arranged in the display area 11, and there is at least one touch electrode in the fingerprint recognition area 15 221. In this embodiment, the size of the touch electrode 221 located in the fingerprint recognition area 15 is smaller than the size of the touch electrode 221 located outside the fingerprint recognition area 15. The touch electrode 221 is electrically connected to the first metal wire 223 through a plurality of first via holes 224. The first metal wire 223 establishes an electrical connection between the touch electrode 221 and the control unit 24 in the non-display area 13. The first metal wires 223 are arranged in parallel along the first direction Y. The touch electrodes 221 constitute a self-capacitive touch sensing structure. The touch electrodes 221 located outside the fingerprint recognition area 15 and the fingerprint recognition area 15 are arranged as large as possible. In this embodiment, the touch electrode 221 is approximately square, and the side length of the touch electrode 221 ranges from 4-5 mm.

The fingerprint identification unit 23 is disposed on the first substrate 21 and located in the fingerprint identification area 15. The fingerprint identification unit 23 is used to identify a user's fingerprint in the fingerprint identification area 15 on the first cover 10. The fingerprint recognition unit 23 is a capacitive fingerprint reader, which includes a plurality of fingerprint recognition electrodes 231. A plurality of the fingerprint identification electrodes 231 are arranged on one side of the touch electrode 221 in the fingerprint identification area 15. In this embodiment, the fingerprint recognition area 15 has one touch electrode 231, and a plurality of the fingerprint recognition electrodes 231 are disposed on the lower side of the touch electrode 221, and are aligned with the first The second direction X, which is perpendicular to the direction Y, is parallel and spaced apart. In other embodiments, the fingerprint recognition electrode 231 may also be arranged above, on the left side, or on the right side of the touch electrode 221 in the fingerprint recognition area 15. The fingerprint recognition electrode 231 is electrically connected to the second metal wire 234 through a plurality of second via holes 232. The second metal wire 234 establishes an electrical connection between the fingerprint identification electrode 231 and the control unit 24 located in the non-display area 13. The second metal wires 234 are arranged in parallel along the first direction Y. In this embodiment, the fingerprint recognition electrode 231 is approximately square, and the side length of the fingerprint recognition electrode 231 ranges from 50 to 60 μm.

The control unit 24 is used to drive the touch unit 22 and the fingerprint identification unit 23. The control unit 24 is disposed on the first substrate 21 and located in the non-display area 13.

The first circuit board 28 is configured to be disposed on the first substrate 21 and used to electrically connect the control unit 24 with a motherboard (not shown). The first circuit board 28 is located in the non-display area 13. In this embodiment, the first circuit board 28 may be a flexible circuit board.

The above-mentioned display device 1a with fingerprint recognition function, by integrating the fingerprint recognition unit 23 and the touch unit 22 and then disposed on the first substrate 21, and further disposed in the display area 11, Realize a narrow bezel design. At the same time, by providing the second cover plate 30 to improve the strength of the fingerprint identification module 20, the fingerprint identification module 20 is prevented from being damaged during assembly and use. In addition, the number of metal wires in the fingerprint identification area 15 is reduced, and the manufacturing difficulty is reduced.

Please refer to FIG. 5, which is a schematic plan view and a partially enlarged schematic view of the fingerprint identification module 20c of the third embodiment in FIG. 2. The fingerprint identification module 20b is used to sense the user's touch operation in the display area 11 on the first cover 10, and to identify the user in the fingerprint recognition area 15 on the first cover 10 Fingerprint inside. The fingerprint identification module 20c is disposed between the first cover plate 10 and the second cover plate 30. The fingerprint recognition module 20c is bonded to the first cover plate 10 by a first adhesive layer 50 and is bonded to the second cover plate 30 by a second adhesive layer 60. Wherein, the thickness of the first adhesive layer 50 and the thickness of the second adhesive layer 60 are 0.075 mm. In this embodiment, the thickness of the fingerprint identification module 20c is 0.245 mm. The fingerprint recognition module 20 b includes a first substrate 21, a touch unit 22, a fingerprint recognition unit 23, a control unit 24 and a first circuit board 28. Wherein, the touch unit 22 and the fingerprint identification unit 23 are both disposed on the first substrate 21 and located in the display area 11. The fingerprint identification unit 23 is further arranged in the fingerprint identification area 15.

The first substrate 21 is made of transparent material. In this embodiment, the first substrate 21 may be a glass substrate, or other transparent substrates with high strength and high hardness, such as polycarbonate (PC), polyester (Polythylene terephthalate, PET), and polyester. It is made of polymethylmethacrylate (PMMA), Cyclic Olefin Copolymer (COC) or Polyether sulfone (PES) and other materials. Wherein, the thickness of the first substrate 21 is 0.2 mm.

The touch unit 22 is disposed on the first substrate 21. The touch unit 22 is used to sense a user's touch operation in the display area 11 on the first cover 10. The touch unit 22 includes a plurality of touch electrodes 221 arranged in a matrix. The touch electrode 221 is arranged in the display area 11 and arranged around the fingerprint recognition area 15. That is, there is no touch electrode 221 in the fingerprint recognition area 15. The touch electrode 221 is electrically connected to the first metal wire 223 through a plurality of first via holes 224. The first metal wire 223 establishes an electrical connection between the touch electrode 221 and the control unit 24 in the non-display area 13. The first metal wires 223 are arranged in parallel along the first direction Y. The touch electrodes 221 constitute a self-capacitive touch sensing structure. The touch electrode 221 and the fingerprint recognition area 15 are arranged as large as possible. In this embodiment, the touch electrode 221 is approximately square, and the side length of the touch electrode 221 ranges from 4-5 mm.

The fingerprint identification unit 23 is disposed on the first substrate 21 and located in the fingerprint identification area 15. The fingerprint identification unit 23 is used to identify a user's fingerprint in the fingerprint identification area 15 on the first cover 10. In this embodiment, the fingerprint recognition unit 23 is a capacitive fingerprint reader, which includes a plurality of fingerprint recognition electrodes 231 arranged in a matrix. Each fingerprint recognition electrode 231 corresponds to a switch element 236. The fingerprint recognition electrode 231 is electrically connected to the control unit 24 through the corresponding switch element 236. The control terminal of the switching element 236 is electrically connected to the control unit 24 through a third metal wire 237, and the first The connection terminal is electrically connected to the control unit 24 through a fourth metal wire 238, and the second connection terminal of the switch element 236 is electrically connected to the corresponding fingerprint identification electrode 231. In this embodiment, the switching element 236 is a thin film transistor. The control unit 24 controls the switching element 236 to provide a fingerprint identification signal to the fingerprint identification electrode 231, and controls the switching element 236 to turn off to stop providing the fingerprint identification signal to the fingerprint identification Electrode 231. The fingerprint recognition electrodes 231 located in the same row are electrically connected to the same third metal wire 237, and the fingerprint recognition electrodes 231 located in the same column are electrically connected to the same fourth metal wire 238. The third metal wire 237 is substantially L-shaped. Wherein, the odd number of the third metal wires 237 includes a first section arranged in parallel along the first direction Y and the left side of the fingerprint recognition area 15 extending along the second direction X to the rows arranged in a row. The second section above the fingerprint identification electrode 231; the even number of the third metal wires 237 include the first section arranged in parallel in the first direction Y and the right side of the fingerprint identification area 15 along the second direction X It extends to the second section above the fingerprint identification electrodes 231 arranged in a row. The fourth metal wire 238 is arranged in parallel along the first direction Y and is insulated from the third metal wire 237. In this embodiment, the fingerprint recognition electrode 231 is approximately square, and the side length of the fingerprint recognition electrode 231 ranges from 50 to 60 μm. For example, when the size of the touch electrode 221 is 4mm*4mm and the size of the fingerprint identification electrode 231 is 50μm*50μm, that is, the number of fingerprint identification electrodes 231 with an area of 2500μm2 in an area of 16000000μm2 is 16000000/2500=6400, that is, the fingerprint recognition electrode 231 is arranged in an 80*80 matrix, that is, the third metal wire 237 includes 80 pieces, and the fourth metal wire 238 includes 80 pieces.

The control unit 24 is used to drive the touch unit 22 and the fingerprint identification unit 23. The control unit 24 is disposed on the first substrate 21 and located in the non-display area 13.

The first circuit board 28 is configured to be disposed on the first substrate 21 and used to electrically connect the control unit 24 with a motherboard (not shown). The first circuit board 28 is located in the non-display area 13. In this embodiment, the first circuit board 28 may be a flexible circuit board.

The above-mentioned display device 1a with fingerprint recognition function, by integrating the fingerprint recognition unit 23 and the touch unit 22 and then disposed on the first substrate 21, and further disposed in the display area 11, Realize a narrow bezel design. At the same time, by adding the second cover plate 30 to improve the strength of the fingerprint identification module 20, the fingerprint identification module 20 is prevented from being damaged during the assembly process and use. In addition, by setting the switch element 236 to control the operation of the fingerprint recognition electrode 231, the number of metal wires in the fingerprint recognition area 15 is reduced, and the manufacturing difficulty of the display device 1a is reduced.

Please refer to FIG. 6, which is a schematic cross-sectional view of the display device 1b of the second embodiment along II-II. The display area 11 serves as a fingerprint recognition area 15 (as shown in FIG. 7 ), that is, the area of the fingerprint recognition area 15 is equal to the area of the display area 11. The display device 1b includes a first cover 10, a fingerprint recognition module 20d, a second cover 30, and a display module 40 that are stacked. The thickness of the first cover 10, the fingerprint identification module 20d, and the second cover 30 is 0.7 mm.

The first cover 10 and the second cover 30 are made of transparent materials, and are used to prevent impurities such as dust from entering the inside of the display device 1b. In this embodiment, the first cover plate 10 and the second cover plate 30 may be glass substrates, or other transparent substrates with high strength and high hardness, such as polycarbonate (PC), polyester (Polythylene terephthalate, PET), polymethylmethacrylate (PMMA), cyclic olefin copolymer (Cyclic Olefin Copolymer, COC) or polyether sulfone (PES) and other materials. The second cover 30 is located between the fingerprint identification module 20 and the display module 40. In this embodiment, the thickness of the first cover plate 10 and the second cover plate 30 are both 0.175 mm. The first A light-shielding layer 17 is provided on the inner surface of the cover plate 10 opposite to the fingerprint recognition module 20. The light-shielding layer 17 is disposed in the non-display area 15 and is made of opaque material.

Please also refer to FIG. 7, which is a schematic plan view and a partially enlarged schematic view of the fingerprint identification module 20 d in FIG. 2. The fingerprint identification module 20d is used to identify a user's fingerprint in the display area 11 on the first cover 10. The fingerprint identification module 20d is arranged between the first cover 10 and the second cover 30. The fingerprint identification module 20d is bonded to the first cover plate 10 by a first adhesive layer 50, and is bonded to the second cover plate 30 by a second adhesive layer 60. Wherein, the thickness of the first adhesive layer 50 and the thickness of the second adhesive layer 60 are 0.075 mm. In this embodiment, the thickness of the fingerprint identification module 20d is 0.245 mm. The fingerprint recognition module 20d includes a first substrate 21, a fingerprint recognition unit 23, a control unit 24, and a first circuit board 28. Wherein, the fingerprint identification unit 23 is disposed on the first substrate 21 and located in the display area 11.

The first substrate 21 is made of transparent material. In this embodiment, the first substrate 21 may be a glass substrate, or other transparent substrates with high strength and high hardness, such as polycarbonate (PC), polyester (Polythylene terephthalate, PET), and polyester. It is made of polymethylmethacrylate (PMMA), Cyclic Olefin Copolymer (COC) or Polyether sulfone (PES) and other materials. Wherein, the thickness of the first substrate 21 is 0.2 mm.

The fingerprint identification unit 23 is disposed on the first substrate 21 and located in the display area 11. The fingerprint recognition unit 23 completely overlaps the display area 11. The fingerprint identification unit 23 is used to identify a user's fingerprint in the display area 11 on the first cover 10. In this embodiment, the fingerprint recognition unit 23 is a capacitive fingerprint reader, which includes a plurality of fingerprint recognition electrodes 231 arranged in a matrix. Each fingerprint recognition electrode 231 corresponds to a switch element 236. The fingerprint recognition electrode 231 is electrically connected to the control unit 24 through the corresponding switch element 236. The control terminal of the switching element 236 is connected to the control terminal through a third metal wire 237 The unit 24 is electrically connected, the first connection end of the switch element 236 is electrically connected to the control unit 24 through a fourth metal wire 238, and the second connection end of the switch element 236 is connected to the corresponding fingerprint identification The electrode 231 is electrically connected. The control unit 24 controls the switching element 236 to provide a fingerprint identification signal to the fingerprint identification electrode 231, and controls the switching element 236 to turn off to stop providing the fingerprint identification signal to the fingerprint identification Electrode 231. The third metal wire 237 is substantially L-shaped. Wherein, the odd number of the third metal wires 237 includes a first section arranged in parallel along the first direction Y and the left side of the fingerprint recognition area 15 extending along the second direction X to the rows arranged in a row. The second section above the fingerprint identification electrode 231; the even number of the third metal wires 237 include the first section arranged in parallel in the first direction Y and the right side of the fingerprint identification area 15 along the second direction X It extends to the second section above the fingerprint identification electrodes 231 arranged in a row. The fourth metal wire 238 is arranged in parallel along the first direction Y and is insulated from the third metal wire 237. In this embodiment, the fingerprint recognition electrode 231 is approximately square, and the side length of the fingerprint recognition electrode 231 ranges from 50 to 60 μm.

The control unit 24 is used to drive the touch unit 22 and the fingerprint identification unit 23. The control unit 24 is disposed on the first substrate 21 and located in the non-display area 13.

The first circuit board 28 is configured to be disposed on the first substrate 21 and used to electrically connect the control unit 24 with a motherboard (not shown). The first circuit board 28 is located in the non-display area 13. In this embodiment, the first circuit board 28 may be a flexible circuit board.

The display module 40 is used for displaying images. The display module 40 is bonded to the surface of the second cover 30 opposite to the touch module 20 by the second adhesive layer 60. The display module 40 includes a first polarizer 42, a color filter 43, a thin film transistor substrate 45, a second polarizer 46 and a second circuit board 48 that are stacked.

The first polarizer 42 is disposed between the second cover 30 and the color filter 43. The color filter 43 is disposed between the first polarizer 42 and the thin film transistor substrate 45. The thin film transistor substrate 45 is disposed between the color filter 43 and the second polarizer 46. The thin film transistor substrate 45 is a thin film transistor substrate on which a plurality of thin film transistors are arranged. The thin film transistor substrate 45 may be a glass substrate, or other transparent substrates with high strength and high hardness, such as polycarbonate (PC), polyester (Polythylene terephthalate, PET), polymethylmethacrylate ( Polymethylmethacrylate (PMMA), Cyclic Olefin Copolymer (COC) or Polyether sulfone (PES) and other materials. The second circuit board 48 is disposed on the thin film transistor substrate 45 and is used to electrically connect the thin film transistor substrate 45 and a motherboard (not shown). In this embodiment, the second circuit board 48 may be a flexible circuit board.

The above-mentioned display device 1b with fingerprint recognition function can realize a narrow frame design by arranging the fingerprint recognition unit 23 in the display area 11. At the same time, by adding the second cover plate 30 to improve the strength of the fingerprint identification module 20, the fingerprint identification module 20 is prevented from being damaged during the assembly process and use. In addition, the fingerprint recognition electrode 231 is arranged in the entire display area 11 to realize a full-screen fingerprint recognition function.

Please refer to FIG. 8, which is a schematic cross-sectional view of the display device 1c of the third embodiment along II-II. A fingerprint recognition area 15 is further defined in the display area 11 (as shown in FIG. 3). Wherein, the area of the fingerprint identification area 15 is smaller than the area of the display area 11. In this embodiment, the fingerprint recognition area 15 is centrally arranged at the bottom of the display area 11. The display device 1c includes a first cover 10, a fingerprint recognition module 20, a second cover 30, and a display module 40 that are stacked. The thickness of the first cover 10, the fingerprint identification module 20, and the second cover 30 are 0.7 mm.

The first cover 10 and the second cover 30 are made of transparent materials, and are used to prevent impurities such as dust from entering the inside of the display device 1c. In this embodiment, the first cover plate 10 and the second cover plate 30 may be glass substrates, or other transparent substrates with high strength and high hardness, such as polycarbonate (PC), polyester (Polythylene terephthalate, PET), polymethylmethacrylate (PMMA), cyclic olefin copolymer (Cyclic Olefin Copolymer, COC) or polyether sulfone (PES) and other materials. The second cover 30 is located between the fingerprint identification module 20 and the display module 40. In this embodiment, the thickness of the first cover plate 10 and the second cover plate 30 are both 0.175 mm. A light-shielding layer 17 is provided on the inner surface of the first cover plate 10 opposite to the fingerprint identification module 20. The light-shielding layer 17 is disposed in the non-display area 15 and is made of opaque material.

Please also refer to FIG. 9, which is a schematic plan view and a partially enlarged schematic view of the fingerprint identification module 20e in FIG. 8. The fingerprint identification module 20e is used to identify a user's fingerprint in the fingerprint identification area 15 on the first cover 10. The fingerprint identification module 20e is arranged between the first cover 10 and the second cover 30. The fingerprint identification module 20e is bonded to the first cover plate 10 by a first adhesive layer 50, and is bonded to the second cover plate 30 by a second adhesive layer 60. Wherein, the thickness of the first adhesive layer 50 and the thickness of the second adhesive layer 60 are 0.075 mm. In this embodiment, the thickness of the fingerprint identification module 20e is 0.245 mm. The fingerprint recognition module 20e includes a first substrate 21, a fingerprint recognition unit 23, a control unit 24, a first circuit board 28, and a first auxiliary unit 26. Wherein, the fingerprint identification unit 23 is disposed on the first substrate 21 and is located in the fingerprint identification area 15.

The first substrate 21 is made of transparent material. In this embodiment, the first substrate 21 may be a glass substrate, or other transparent substrates with high strength and high hardness, such as polycarbonate (PC), polyester (Polythylene terephthalate, PET), and polyester. Polymethylmethacrylate (PMMA), Cyclic Olefin Copolymer, COC) or polyether sulfone (PES) and other materials. Wherein, the thickness of the first substrate 21 is 0.2 mm.

The fingerprint identification unit 23 is disposed on the first substrate 21 and located in the fingerprint identification area 15. The fingerprint identification unit 23 is used to identify a user's fingerprint in the fingerprint identification area 15 on the first cover 10. In this embodiment, the fingerprint recognition unit 23 is a capacitive fingerprint reader, which includes a plurality of fingerprint recognition electrodes 231 arranged in a matrix. The fingerprint recognition electrode 231 is electrically connected to the second metal wire 234 through a plurality of second via holes 232. The second metal wire 234 establishes an electrical connection between the fingerprint identification electrode 231 and the control unit 24 located in the non-display area 13. The second metal wires 234 are arranged in parallel along the first direction Y. In this embodiment, the fingerprint recognition electrode 231 is approximately square, and the side length of the fingerprint recognition electrode 231 ranges from 50 to 60 μm.

The control unit 24 is used to drive the touch unit 22 and the fingerprint identification unit 23. The control unit 24 is disposed on the first substrate 21 and located in the non-display area 13.

The first auxiliary unit 26 is disposed on the first substrate 21. The first auxiliary unit 26 is used to cooperate with the fingerprint identification unit 20 to ensure that the display device 1c has uniform light transmittance in the display area 11. The first auxiliary unit 26 includes a plurality of first auxiliary electrodes 261 arranged in a matrix. The first auxiliary electrode 261 is disposed in the display area 11, and there is at least one first auxiliary electrode 261 in the fingerprint recognition area 15. The first auxiliary electrode 261 and the fingerprint recognition electrode 231 are arranged as large. In this embodiment, the first auxiliary electrode 261 is approximately square, and the side length of the first auxiliary electrode 261 ranges from 4-5 mm.

The first circuit board 28 is configured to be disposed on the first substrate 21 and used to electrically connect the control unit 24 with a motherboard (not shown). The first circuit board 28 is located in the non-display area 13. In this embodiment, the first circuit board 28 may be a flexible circuit board.

The display module 40 is used for displaying images. The display module 40 is bonded to the surface of the second cover 30 opposite to the touch module 20 by the second adhesive layer 60. The display module 40 includes a first polarizer 42, a color filter 43, a thin film transistor substrate 45, a second polarizer 46 and a second circuit board 48 that are stacked.

The first polarizer 42 is disposed between the second cover 30 and the color filter 43. The color filter 43 is disposed between the first polarizer 42 and the thin film transistor substrate 45. The thin film transistor substrate 45 is disposed between the color filter 43 and the second polarizer 46. The thin film transistor substrate 45 is a thin film transistor substrate on which a plurality of thin film transistors are arranged. The thin film transistor substrate 45 may be a glass substrate, or other transparent substrates with high strength and high hardness, such as polycarbonate (PC), polyester (Polythylene terephthalate, PET), polymethylmethacrylate ( Polymethylmethacrylate (PMMA), Cyclic Olefin Copolymer (COC) or Polyether sulfone (PES) and other materials. The second circuit board 48 is disposed on the thin film transistor substrate 45 and is used to electrically connect the thin film transistor substrate 45 and a motherboard (not shown). In this embodiment, the second circuit board 48 may be a flexible circuit board.

The above-mentioned display device 1c with fingerprint recognition function can realize a narrow frame design by arranging the fingerprint recognition unit 23 in the display area 11. At the same time, by adding the second cover plate 30 to improve the strength of the fingerprint identification module 20, the fingerprint identification module 20 is prevented from being damaged during the assembly process and use. In addition, the first auxiliary electrode 261 is arranged outside the fingerprint recognition area 15 to ensure the uniformity of light transmission in the display area 11 and avoid the fingerprint recognition area 15 and all areas outside the fingerprint recognition area 15 The light transmittance between the display areas 11 is inconsistent.

Please refer to FIG. 10, which is a schematic cross-sectional view of the display device 1d of the fourth embodiment along II-II. A fingerprint recognition area 15 is further defined in the display area 11 (as shown in FIG. 3). in, The area of the fingerprint recognition area 15 is smaller than the area of the display area 11. In this embodiment, the fingerprint recognition area 15 is centrally arranged at the bottom of the display area 11. The display device 1d includes a first cover 10, a fingerprint identification module 20f, and a display module 40 that are stacked. Wherein, the thickness of the first cover 10 and the fingerprint identification module 20f is 0.7 mm.

The first cover 10 is made of a transparent material, and is used to prevent impurities such as dust from entering the interior of the display device 1d. In this embodiment, the first cover plate 10 may be a glass substrate, or other transparent substrates with high strength and high hardness, such as polycarbonate (PC), polyester (Polythylene terephthalate, PET), and It is made of polymethylmethacrylate (PMMA), Cyclic Olefin Copolymer (COC) or Polyether sulfone (PES) and other materials. In this embodiment, the thickness of the first cover plate 10 is 0.175 mm. A light-shielding layer 17 is provided on the inner surface of the first cover 10 opposite to the fingerprint identification module 20f. The light-shielding layer 17 is disposed in the non-display area 15 and is made of opaque material.

The fingerprint identification module 20f is used to identify a user's fingerprint in the fingerprint identification area 15 on the first cover 10. The fingerprint identification module 20f is arranged between the first cover 10 and the display module 40. The fingerprint recognition module 20f is bonded to the first cover plate 10 by a first adhesive layer 50, and is bonded to the display module 40 by a second adhesive layer 60. Wherein, the thickness of the first adhesive layer 50 and the thickness of the second adhesive layer 60 are 0.075 mm. In this embodiment, the thickness of the fingerprint identification module 20f is 0.245 mm. The fingerprint recognition module 20f includes a first substrate 21, a touch unit 22, a fingerprint recognition unit 23, a control unit 24, a second substrate 25, a first auxiliary unit 26, a second auxiliary unit 27, and a first circuit board 28. Wherein, the touch unit 22 and the fingerprint identification unit 23 are both disposed on the first substrate 21 and located in the display area 11. The fingerprint identification unit 23 is further arranged in the fingerprint identification area 15.

The first substrate 21 and the second substrate 25 are made of transparent materials. In this embodiment, the first substrate 21 and the second substrate 25 may be glass substrates, or other transparent substrates with high strength and high hardness, such as polycarbonate (PC), polyester (Polythylene It is made of terephthalate (PET), polymethylmethacrylate (PMMA), cycloolefin copolymer (Cyclic Olefin Copolymer, COC) or polyether sulfone (PES) and other materials. Wherein, the thickness of the first substrate 21 and the second substrate 25 are both 0.2 mm. The first substrate 21 is located between the second substrate 25 and the display module 40. The second substrate 25 is located between the first substrate 21 and the first cover plate 10.

The touch unit 22 is disposed on the first substrate 21. The touch unit 22 is used to sense a user's touch operation in the display area 11 on the first cover 10. The touch unit 22 includes a plurality of touch electrodes 221 arranged in a matrix. In this embodiment, as shown in FIG. 3, the touch electrode 221 is arranged in the display area 11 and arranged around the fingerprint recognition area 15. That is, there is no touch electrode 221 in the fingerprint recognition area 15. In other embodiments, as shown in FIG. 4, there is at least one touch electrode 221 in the fingerprint recognition area 15. The touch electrode 221 is electrically connected to the first metal wire 223 through a plurality of first via holes 224. The first metal wire 223 establishes an electrical connection between the touch electrode 221 and the control unit 24 in the non-display area 13. The first metal wires 223 are arranged in parallel along the first direction Y. The touch electrodes 221 constitute a self-capacitive touch sensing structure. In this embodiment, the touch electrode 221 is approximately square, and the side length of the touch electrode 221 is 4-5 mm.

The fingerprint identification unit 23 is disposed on the first substrate 21 and located in the fingerprint identification area 15. The fingerprint identification unit 23 is used to identify a user's fingerprint in the fingerprint identification area 15 on the first cover 10. The fingerprint recognition unit 23 is a capacitive fingerprint reader, which includes a plurality of fingerprint recognition electrodes 231 arranged in a matrix. In this embodiment, as shown in FIG. 3, the fingerprint recognition electrodes 231 are arranged in a matrix. In other embodiments, as shown in FIG. 4, the The fingerprint recognition electrodes 23 may be arranged in a row along the second direction X perpendicular to the first direction Y. The fingerprint recognition electrode 231 is electrically connected to the second metal wire 234 through a plurality of second via holes 232. The second metal wire 234 establishes an electrical connection between the fingerprint identification electrode 231 and the control unit 24 located in the non-display area 13. The second metal wires 234 are arranged in parallel along the first direction Y. In other embodiments, as shown in FIG. 5, each fingerprint identification electrode 231 corresponds to a switch element 236. The fingerprint recognition electrode 231 is electrically connected to the control unit 24 through the corresponding switch element 236. The control end of the switch element 236 is electrically connected to the control unit 24 through a third metal wire 237, and the first connection end of the switch element 236 is electrically connected to the control unit 24 through a fourth metal wire 238. Connected, the second connection end of the switch element 236 is electrically connected to the corresponding fingerprint identification electrode 231. In this embodiment, the fingerprint recognition electrode 231 is approximately square, and the side length of the fingerprint recognition electrode 231 ranges from 50 to 60 μm.

The control unit 24 is used to drive the touch unit 22 and the fingerprint identification unit 23. The control unit 24 is disposed on the first substrate 21 and located in the non-display area 13.

Please also refer to FIG. 11, which is a schematic plan view and a partially enlarged schematic view of the second substrate 25 in FIG. 10. The first auxiliary unit 26 is disposed on the second substrate 25. Through capacitive coupling between the first auxiliary unit 26 and the touch unit 22, the touch operation of the user in the display area 11 of the first cover 10 is provided to the touch unit twenty two. The first auxiliary unit 26 overlaps the touch unit 22 along the light emitting direction. The first auxiliary unit 26 includes a plurality of first auxiliary electrodes 261 arranged in a matrix. The first auxiliary electrode 261 is arranged in the display area 11 and arranged around the fingerprint recognition area 15. That is, the first auxiliary electrode 261 is not included in the fingerprint recognition area 15. Each of the first auxiliary electrodes 261 corresponds to one touch electrode 221. The first auxiliary electrode 261 and the fingerprint recognition area 15 etc. Great setting. In this embodiment, the first auxiliary electrode 261 is approximately square, and the side length of the first auxiliary electrode 261 is 4-5 mm.

The second auxiliary unit 27 is disposed on the second substrate 25. The second auxiliary unit 27 is arranged as large as the first auxiliary electrode 261 and is further arranged as large as the fingerprint recognition area 15. The second auxiliary unit 27 and the fingerprint recognition unit 23 provide the fingerprint recognition unit 23 with the fingerprint of the user in the fingerprint recognition area 15 of the first cover plate 10 through capacitive coupling. . The second auxiliary unit 27 overlaps the fingerprint identification unit 23 along the light emitting direction. The second auxiliary unit 27 includes a plurality of second auxiliary electrodes 271 arranged in a matrix. The second auxiliary electrode 271 is arranged in the fingerprint recognition area 15. Each second auxiliary electrode 271 corresponds to one fingerprint recognition electrode 231. The size of the second auxiliary electrode 271 is smaller than that of the first auxiliary electrode 261. In this embodiment, the second auxiliary electrode 271 is approximately square, and the side length of the second auxiliary electrode 271 ranges from 50 to 60 μm.

The first circuit board 28 is configured to be disposed on the first substrate 21 and used to electrically connect the control unit 24 with a motherboard (not shown). The first circuit board 28 is located in the non-display area 13. In this embodiment, the first circuit board 28 may be a flexible circuit board.

The display module 40 is used for displaying images. The display module 40 is bonded to the surface of the first substrate 21 opposite to the first cover 10 through the second bonding layer 60. The display module 40 includes a first polarizer 42, a color filter 43, a thin film transistor substrate 45, a second polarizer 46 and a second circuit board 48 that are stacked.

The second cover 30 is made of a transparent material, and is used to prevent impurities such as dust from entering the inside of the display module 40. In this embodiment, the second cover plate 30 may be a glass substrate, or other transparent substrates with high strength and high hardness, such as polycarbonate (PC), polyester (Polythylene terephthalate, PET), and polycarbonate. Polymethylmethacrylate (PMMA), Cyclic Olefin Copolymer, COC) or polyether sulfone (PES) and other materials. In this embodiment, the thickness of the second cover plate 30 is 0.175 mm.

The first polarizer 42 is disposed between the second cover 30 and the color filter 43. The color filter 43 is disposed between the first polarizer 42 and the thin film transistor substrate 45. The thin film transistor substrate 45 is disposed between the color filter 43 and the second polarizer 46. The thin film transistor substrate 45 is a thin film transistor substrate on which a plurality of thin film transistors are arranged. The thin film transistor substrate 45 may be a glass substrate, or other transparent substrates with high strength and high hardness, such as polycarbonate (PC), polyester (Polythylene terephthalate, PET), polymethylmethacrylate ( Polymethylmethacrylate (PMMA), Cyclic Olefin Copolymer (COC) or Polyether sulfone (PES) and other materials. The second circuit board 48 is disposed on the thin film transistor substrate 45 and is used to electrically connect the thin film transistor substrate 45 and a motherboard (not shown). In this embodiment, the second circuit board 48 may be a flexible circuit board.

The above-mentioned display device 1d with fingerprint recognition function can realize a narrow frame design by arranging the fingerprint recognition unit 23 in the display area 11. At the same time, by increasing the second substrate 25 to increase the strength of the fingerprint identification module 20f, the fingerprint identification module 20f is prevented from being damaged during the assembly process and use. In addition, with the first auxiliary unit 26 and the second auxiliary unit 27 disposed close to the first cover plate 10, the sensing sensitivity of the touch unit 22 and the fingerprint identification unit 23 is improved.

Please refer to FIG. 12, which is a schematic cross-sectional view of the display device 1e of the fifth embodiment along II-II. A fingerprint recognition area 15 is further defined in the display area 11 (as shown in FIG. 3). Wherein, the area of the fingerprint identification area 15 is smaller than the area of the display area 11. In this embodiment, the fingerprint recognition area 15 is centrally arranged at the bottom of the display area 11. The display device 1d includes a first cover 10, a fingerprint recognition module 20, and a display module 40 that are stacked. Wherein, the thickness of the first cover 10 and the fingerprint identification module 20 is 0.7 mm.

The first cover 10 is made of a transparent material, and is used to prevent impurities such as dust from entering the interior of the display device 1d. In this embodiment, the first cover plate 10 may be a glass substrate, or other transparent substrates with high strength and high hardness, such as polycarbonate (PC), polyester (Polythylene terephthalate, PET), and It is made of polymethylmethacrylate (PMMA), Cyclic Olefin Copolymer (COC) or Polyether sulfone (PES) and other materials. In this embodiment, the thickness of the first cover plate 10 is 0.3 mm. A light-shielding layer 17 is provided on the inner surface of the first cover plate 10 opposite to the fingerprint identification module 20. The light-shielding layer 17 is disposed in the non-display area 15 and is made of opaque material.

The fingerprint identification module 20 is used to identify a user's fingerprint in the fingerprint identification area 15 on the first cover 10. The fingerprint identification module 20 is arranged between the first cover 10 and the display module 40. The fingerprint recognition module 20 is bonded to the first cover plate 10 by a first adhesive layer 50, and is bonded to the display module 40 by a second adhesive layer 60. Wherein, the thickness of the first adhesive layer 50 and the thickness of the second adhesive layer 60 are 0.075 mm. In this embodiment, the thickness of the fingerprint identification module 20 is 0.325 mm. The fingerprint recognition module 20 includes a first substrate 21, a touch unit 22, a fingerprint recognition unit 23, a control unit 24 and a first circuit board 28. Wherein, the touch unit 22 and the fingerprint identification unit 23 are both disposed on the first substrate 21 and located in the display area 11. The fingerprint identification unit 23 is further arranged in the fingerprint identification area 15.

The first substrate 21 is made of transparent material. In this embodiment, the first substrate 21 may be a glass substrate, or other transparent substrates with high strength and high hardness, such as polycarbonate (PC), polyester (Polythylene terephthalate, PET), and polyester. Acrylic acid It is made of polymethylmethacrylate (PMMA), Cyclic Olefin Copolymer (COC) or Polyether sulfone (PES) and other materials. Wherein, the thickness of the first substrate 21 is 0.325 mm. The first substrate 21 is located between the first cover 10 and the display module 40.

The touch unit 22 is disposed on the first substrate 21. The touch unit 22 is used to sense a user's touch operation in the display area 11 on the first cover 10. The touch unit 22 includes a plurality of touch electrodes 221 arranged in a matrix. In this embodiment, as shown in FIG. 3, the touch electrode 221 is arranged in the display area 11 and arranged around the fingerprint recognition area 15. That is, there is no touch electrode 221 in the fingerprint recognition area 15. In other embodiments, as shown in FIG. 4, there is at least one touch electrode 221 in the fingerprint recognition area 15. The touch electrode 221 is electrically connected to the first metal wire 223 through a plurality of first via holes 224. The first metal wire 223 establishes an electrical connection between the touch electrode 221 and the control unit 24 in the non-display area 13. The first metal wires 223 are arranged in parallel along the first direction Y. The touch electrodes 221 constitute a self-capacitive touch sensing structure. In this embodiment, the touch electrode 221 is approximately square, and the side length of the touch electrode 221 ranges from 4-5 mm.

The fingerprint identification unit 23 is disposed on the first substrate 21 and located in the fingerprint identification area 15. The fingerprint identification unit 23 is used to identify a user's fingerprint in the fingerprint identification area 15 on the first cover 10. The fingerprint recognition unit 23 is a capacitive fingerprint reader, which includes a plurality of fingerprint recognition electrodes 231. In this embodiment, as shown in FIG. 3, the fingerprint recognition electrodes 231 are arranged in a matrix. In other embodiments, as shown in FIG. 4, the fingerprint recognition electrodes 231 may be arranged in a row along the second direction X perpendicular to the first direction Y. The fingerprint recognition electrode 231 is electrically connected to the second metal wire 234 through a plurality of second via holes 232. The second metal wire 234 establishes an electrical connection between the fingerprint identification electrode 231 and the control unit 24 located in the non-display area 13. The second metal wire 234 is flat along the first direction Y Row settings. In other embodiments, as shown in FIG. 5, each fingerprint identification electrode 231 corresponds to a switch element 236. The fingerprint recognition electrode 231 is electrically connected to the control unit 24 through the corresponding switch element 236. The control end of the switch element 236 is electrically connected to the control unit 24 through a third metal wire 237, and the first connection end of the switch element 236 is electrically connected to the control unit 24 through a fourth metal wire 238. Connected, the second connection end of the switch element 236 is electrically connected to the corresponding fingerprint identification electrode 231. In this embodiment, the fingerprint recognition electrode 231 is approximately square, and the side length of the fingerprint recognition electrode 231 ranges from 50 to 60 μm.

The control unit 24 is used to drive the touch unit 22 and the fingerprint identification unit 23. The control unit 24 is disposed on the first substrate 21 and located in the non-display area 13.

The first circuit board 28 is disposed on the first substrate 21 and is used to electrically connect the control unit 24 with a motherboard (not shown). The first circuit board 28 is located in the non-display area 13. In this embodiment, the first circuit board 28 may be a flexible circuit board.

The display module 40 is used for displaying images. The display module 40 is bonded to the surface of the touch module 20 opposite to the first cover 10 through the second adhesive layer 60. The display module 40 includes a first polarizer 42, a color filter 43, a thin film transistor substrate 45, a second polarizer 46 and a second circuit board 48 that are stacked.

The first polarizer 42 is disposed between the second cover 30 and the color filter 43. The color filter 43 is disposed between the first polarizer 42 and the thin film transistor substrate 45. The thin film transistor substrate 45 is disposed between the color filter 43 and the second polarizer 46. The thin film transistor substrate 45 is a thin film transistor substrate on which a plurality of thin film transistors are arranged. The thin film transistor substrate 45 may be a glass substrate, or other transparent substrates with high strength and high hardness, such as polycarbonate (PC), polyester (Polythylene terephthalate, PET), polymethylmethacrylate ( Polymethylmethacrylate,PMMA), It is made of materials such as Cyclic Olefin Copolymer (COC) or Polyether sulfone (PES). The second circuit board 48 is disposed on the thin film transistor substrate 45 and is used to electrically connect the thin film transistor substrate 45 and a motherboard (not shown). In this embodiment, the second circuit board 48 may be a flexible circuit board.

In the above-mentioned display device 1e with fingerprint recognition function, by arranging the fingerprint recognition unit 23 in the display area 11, a narrow frame design can be realized. At the same time, by increasing the thickness of the first cover 10 and the first substrate 21 to improve the strength of the fingerprint identification module 20, the fingerprint identification module 20 is prevented from being damaged during the assembly process and use.

Those of ordinary skill in the art should realize that the above embodiments are only used to illustrate the present invention, but not to limit the present invention. As long as they are within the essential spirit of the present invention, the above embodiments are appropriately made. Changes and changes fall within the scope of protection of the present invention.

1a: display device

11: Display area

15: Fingerprint recognition area

10: The first cover

20: Fingerprint recognition module

30: second cover

40: display module

50: The first bonding layer

60: second bonding layer

21: The first substrate

22: Touch unit

23: Fingerprint recognition unit

24: control unit

28: The first circuit board

42: The first polarizer

43: color filter

45: Thin film transistor substrate

46: second polarizer

48: second circuit board

Claims (10)

A display device with a fingerprint recognition function, wherein the display device with a fingerprint recognition function comprises: a first cover plate, the first cover plate defines a display area and a non-display area set around the display area; A fingerprint recognition area is further defined in the display area; a display module for displaying images; and a fingerprint recognition module located between the first cover and the display module; the fingerprint recognition module It includes a first substrate, a touch unit, a fingerprint recognition unit, and a control unit; the first substrate is disposed between the first cover and the display module, and the touch unit and the fingerprint recognition unit are disposed On the same first substrate; the touch unit is located in the display area and is arranged around the fingerprint recognition unit; the touch unit is used to sense that the user is on the first cover Touch operation in the display area; the fingerprint identification unit is arranged in the fingerprint identification area and is used to identify the fingerprint on the first cover; the fingerprint identification unit further includes a plurality of switch elements; the fingerprint The identification electrode is electrically connected to the control unit through the corresponding switch element; the control terminal of the switch element is electrically connected to the control unit through a third metal wire, and the first connection terminal of the switch element The fourth metal wire is electrically connected to the control unit, and the second connection end of the switch element is electrically connected to the corresponding fingerprint recognition electrode; the fingerprint recognition electrode in the same row is electrically connected to the same fingerprint recognition electrode The third metal wire is electrically connected, and the fingerprint identification electrodes in the same column are electrically connected to the same fourth metal wire. The display device with fingerprint recognition function according to claim 1, wherein the display device further includes a second cover plate; the second cover plate is arranged between the fingerprint recognition module and the display module The second cover is used to support the fingerprint recognition module; the total thickness of the first cover, the fingerprint recognition module and the second cover is 0.7 mm. The display device with fingerprint recognition function according to claim 2, wherein the touch unit includes a plurality of touch electrodes arranged in a matrix; the fingerprint recognition unit includes a plurality of fingerprint recognition electrodes arranged in a matrix; The size of the fingerprint identification electrode is smaller than the size of the touch electrode; the touch electrode and the fingerprint identification area are arranged as large. The display device with fingerprint recognition function according to claim 2, wherein the touch unit includes a plurality of touch electrodes arranged in a matrix; one of the touch electrodes is arranged in the fingerprint recognition area; The fingerprint identification unit includes a plurality of fingerprint identification electrodes arranged in a matrix; the size of the fingerprint identification electrode is smaller than the size of the touch electrode; One side of the control electrode; the touch electrode located outside the fingerprint recognition area and the fingerprint recognition area are arranged as large. The display device with fingerprint recognition function according to claim 1, wherein the total thickness of the first cover plate and the fingerprint recognition module is 0.7 mm. The display device with fingerprint recognition function according to claim 5, wherein the fingerprint recognition module further includes a second substrate, a touch unit, and a first auxiliary unit; the second substrate is disposed on the first cover Between the board and the first substrate; the first auxiliary unit is disposed on the second substrate, and is disposed opposite to the touch unit; between the first auxiliary unit and the touch unit Through capacitive coupling, the touch operation of the user in the display area of the first cover is provided to the touch unit. The display device with fingerprint recognition function according to claim 6, wherein the fingerprint recognition module further includes a second auxiliary unit; the second auxiliary unit is disposed on the second substrate and is connected to the fingerprint The identification units are arranged relatively; the second auxiliary unit and the fingerprint identification unit provide the fingerprint identification unit with the fingerprint of the user in the fingerprint identification area of the first cover through capacitive coupling . The display device with fingerprint recognition function according to claim 7, wherein the first auxiliary unit includes a plurality of first auxiliary electrodes arranged in a matrix; the first auxiliary electrodes are arranged in the display area, and Arranged around the fingerprint recognition area; the second auxiliary unit includes a plurality of second auxiliary electrodes arranged in a matrix; the size of the first auxiliary electrode is larger than the size of the second auxiliary electrode; the first auxiliary electrode It is arranged as large as the second auxiliary unit, and further arranged as large as the fingerprint recognition area. The display device with fingerprint recognition function according to claim 6, wherein the touch unit includes a plurality of touch electrodes arranged in a matrix; the fingerprint recognition unit includes a plurality of fingerprint recognition electrodes arranged in a matrix; The size of the fingerprint identification electrode is smaller than the size of the touch electrode; the touch electrode and the fingerprint identification area are arranged as large. The display device with fingerprint recognition function according to claim 6, wherein the touch unit includes a plurality of touch electrodes arranged in a matrix; one of the touch electrodes is arranged in the fingerprint recognition area; The fingerprint identification unit includes a plurality of fingerprint identification electrodes arranged in a matrix; the size of the fingerprint identification electrode is smaller than the size of the touch electrode; One side of the control electrode; the touch electrode located outside the fingerprint recognition area and the fingerprint recognition area are arranged as large.

Images