# US 2019/0377923 A1 · Display panel and display device

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- Number: US 2019/0377923 A1
- Document ID: US20190377923A1
- Status: Published application
- Kind: A1
- Application number: 16/124,465
- Filed: 2018-09-07
- Published: 2019-12-12
- Earliest claimed: 2018-06-08
- Assignees: Shanghai Tianma Am-Oled Co., Ltd.
- Applicants: Shanghai Tianma AM-OLED Co., Ltd.
- Inventors: Xian CHEN; Xingxing YANG; Lijing HAN; Chunpeng ZHANG; Yongzhi WANG; Tao PENG
- Web page: https://patentgrep.com/patent/US20190377923A1

## CPC

- H04M 1/0266: {for a display module assembly}
- G06V 40/13: Sensors therefor
- G06V 40/1318: {using electro-optical elements or layers, e.g. electroluminescent sensing}
- G09G 3/3225: using an active matrix
- G09G 3/3233: with pixel circuitry controlling the current through the light-emitting element
- G09G 3/3266: Details of drivers for scan electrodes
- G06V 40/1376: {Matching features related to ridge properties or fingerprint texture}
- G09G 2300/0426: Layout of electrodes and connections
- G09G 2300/0809: Several active elements per pixel in active matrix panels
- G09G 2300/0819: used for counteracting undesired variations, e.g. feedback or autozeroing
- G09G 2300/0842: forming a memory circuit, e.g. a dynamic memory with one capacitor
- G09G 2300/0861: with additional control of the display period without amending the charge stored in a pixel memory, e.g. by means of additional select electrodes
- G09G 2354/00: Aspects of interface with display user
- G09G 2358/00: Arrangements for display data security
- H04M 1/67: by electronic means
- H04M 2250/12: including a sensor for measuring a physical value, e.g. temperature or motion
- H04M: TELEPHONIC COMMUNICATION (circuits for controlling other apparatus via a telephone cable and not involving telephone switching apparatus G08)
- G06V: IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G09G: ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION (arrangements for transferring data between digital computers and displays G06F3/14; static indicating arrangements comprising an association of a number of separate sources or light control cells G09F9/00; static indicating arrangements comprising integral associations of a number of light sources H01J, H01K, H10H, H05B33/12; scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission, details thereof H04N1/00)

## Abstract

The present disclosure provides a display panel and a display device. The display panel has a display area and non-display area. The display panel includes a plurality of display units arranged in an array within the display area; and a plurality of pixel driving circuits correspondingly connected to the plurality of display units. The display area includes a fingerprint recognition region. The plurality of display units disposed within the fingerprint recognition region includes at least one first display unit. The plurality of pixel driving circuits includes at least one first pixel driving circuit electrically connected to the at least one first display unit. Each of the at least one first pixel driving circuit includes a storage capacitor and a plurality of thin film transistors. The storage capacitor and/or at least one of the plurality of thin film transistors are located within the non-display area.

## Claims

### Claim 1

A display panel, wherein the display panel has a display area and a non-display area, the display panel comprising:
a plurality of display units arranged in an array within the display area; and
a plurality of pixel driving circuits, each of which is connected to a respective one of the plurality of display units,
wherein the display area comprises a fingerprint recognition region; at least one of the plurality of display units is disposed within the fingerprint recognition region and comprises at least one first display unit; and the plurality of pixel driving circuits comprises at least one first pixel driving circuit electrically connected to the at least one first display unit; each of the at least one first pixel driving circuit comprises a storage capacitor and a plurality of thin film transistors, and the storage capacitor and/or at least one of the plurality of thin film transistors are located within the non-display area.

### Claim 2 (depends on 1)

The display panel according to claim 1, wherein the display panel further comprises a plurality of data lines arranged along a first direction and extending along a second direction, the first direction is different from the second direction; each of the plurality of data lines is electrically connected to pixel driving circuits of the plurality of pixel driving circuits corresponding to a respective one column of display units of the plurality of display units;
wherein the plurality of thin film transistors comprises a light-emitting control transistor, a data writing transistor, and an anode initialization transistor; a terminal of the light-emitting control transistor is connected to the at least one first display unit; a terminal of the anode initialization transistor is connected to the at least one first display unit; and the data writing transistor is connected to a corresponding data line of the plurality of data lines.

### Claim 3 (depends on 2)

The display panel according to claim 2, wherein the light-emitting control transistor, the data writing transistor, and the storage capacitor are located within the non-display area;
and the anode initialization transistor is located within the display area.

### Claim 4 (depends on 2)

The display panel according to claim 2, wherein the storage capacitor and each of the plurality of thin film transistors are located within the non-display area.

### Claim 5 (depends on 2)

The display panel according to claim 2, wherein the plurality of display units further comprises a plurality of second display units; the plurality of pixel driving circuits further comprises a plurality of second pixel driving circuits; the plurality of second pixel driving circuits are connected to the plurality of second display units in one-to-one correspondence, and projections of the plurality of second pixel driving circuits on a plane of the display panel at least partially overlap with projections of the plurality of second display units on the plane of the display panel.

### Claim 6 (depends on 5)

The display panel according to claim 5, wherein the terminal of the light-emitting control transistor is connected to the at least one first display unit through a first connection line; and a terminal of the data writing transistor is connected to the corresponding data line through a second connection line.

### Claim 7 (depends on 6)

The display panel according to claim 6, further comprising: at least one scan driving circuit; and a plurality of sets of signal lines arranged along the second direction and extending along the first direction; each set of the plurality of sets of signal lines is electrically connected to the at least one scan driving circuit, and projections of the first connection line and the second connection line on the plane of the display panel do not overlap with a projection of the set of signal lines on the plane of the display panel;
wherein the non-display area comprises a first non-display area and a second non-display area;
wherein the first non-display area, the fingerprint recognition region, and the second non-display area are sequentially arranged along the first direction; and
wherein along the first direction, the first connection line extends from the light-emitting control transistor of the at least one first pixel driving circuit to the at least one first display unit; the second connection line extends from the data writing transistor of the at least one first pixel driving circuit to a corresponding data line of the at least one first display unit.

### Claim 8 (depends on 7)

The display panel according to claim 7, wherein the at least one scan driving circuit is located within the first non-display area and the at least one first pixel driving circuit is located within the second non-display area, or the at least one scan driving circuit is located within the second non-display area and the at least one first pixel driving circuit is located within the first non-display area.

### Claim 9 (depends on 8)

The display panel according to claim 8, wherein a distance between the at least one first display unit and the first non-display area along the first direction is d1, and a distance between the first display unit and the second non-display area along the first direction is d2;
wherein when d1<d2, the at least one first pixel driving circuit corresponding to the at least one first display unit is located within the first non-display area, and the at least one scan driving circuit is located within the second non-display area; and
wherein when d2<d1, the at least one first pixel driving circuit corresponding to the at least one first display unit is located within the second non-display area, and the at least one scan driving circuit is located within the first non-display area.

### Claim 10 (depends on 7)

The display panel according to claim 7, wherein the at least one scan driving circuit comprises a first scan driving circuit and a second scan driving circuit; wherein the first scan driving circuit is located within the first non-display area and the second scan driving circuit is located within the second non-display area;
wherein each set of the plurality sets of signal lines extends along the first direction, and each set of the plurality sets of signal lines breaks at a position corresponding to the at least one first display unit.

### Claim 11 (depends on 10)

The display panel according to claim 10, wherein the at least one first display unit comprise a display unit located at an ith row and a jth column, and an ith set of the plurality of sets of signal lines is electrically connected to the at least one first pixel driving circuit, wherein both i and j are positive integers larger than or equal to 2;
wherein each set of the plurality of sets of signal lines comprises a first scan signal line, a second scan signal line, and a light-emitting signal line that are sequentially arranged along the second direction; and
wherein a projection of the first connection line on the plane of the display panel is between a projection of an (i+1)th first scan signal line and a projection of an ith light-emitting signal line on the plane of the display panel, a projection of the second connection line on the plane of the display panel is between a projection of an ith first scan signal line and a projection of an (i−1)th light-emitting signal line on the plane of the display panel.

### Claim 12 (depends on 11)

The display panel according to claim 11, further comprising a power signal line and a reference voltage signal line;
wherein the anode initialization transistor of the first pixel driving circuit comprises a gate electrode connected to the (i+1)th first scan signal line; and another terminal of the anode initialization transistor is connected to the reference voltage signal line; and
wherein the at least one first pixel driving circuit further comprises a stabilization capacitor located within the non-display area, and the stabilization capacitor comprises a first electrode plate and a second electrode plate; the first electrode plate is connected to the power signal line, and the second electrode plate is connected to the reference voltage signal line.

### Claim 13 (depends on 12)

The display panel according to claim 12, wherein the storage capacitor comprises a third electrode plate and a fourth electrode plate; the first electrode plate and the third electrode plate are located in a same layer, and the second electrode plate and the fourth electrode plate are located in a same layer.

### Claim 14 (depends on 13)

The display panel according to claim 13, wherein the first connection line, the second connection line, and the third electrode plate of the storage capacitor are located in a same layer.

### Claim 15 (depends on 12)

The display panel according to claim 12, wherein each of the at least one first pixel driving circuit further comprises a capacitance initialization transistor; the capacitance initialization transistor comprises a gate electrode connected to the first scan signal line, a first electrode connected to the reference voltage signal line, and a second electrode connected to the second electrode plate of the stabilization capacitor.

### Claim 16 (depends on 1)

The display panel according to claim 1, wherein at least one row of display units of the plurality of display units comprises the at least one first display unit.

### Claim 17 (depends on 16)

The display panel according to claim 16, wherein within the fingerprint recognition region, each row of display units of the plurality of display units comprises one of the at least one first display unit, and first display units in different rows of display units are located in different columns.

### Claim 18 (depends on 16)

The display panel according to claim 16, wherein each row of display units comprises at least two adjacent first display units.

### Claim 19 (depends on 1)

The display panel according to claim 1, further comprising a base substrate, a fingerprint recognition light source, and a fingerprint recognition unit, wherein the fingerprint recognition unit is disposed on a side of the base substrate away from a light-out side of the display panel.

### Claim 20

A display device, comprising a display panel having a display area and a non-display area, wherein the display panel comprises:
a plurality of display units arranged in an array within the display area; and
a plurality of pixel driving circuits, each of which is connected to a respective one of the plurality of display units,
wherein the display area comprises a fingerprint recognition region; at least one of the plurality of display units is disposed within the fingerprint recognition region and comprises at least one first display unit; and the plurality of pixel driving circuits comprises at least one first pixel driving circuit electrically connected to the at least one first display unit; each of the at least one first pixel driving circuit comprises a storage capacitor and a plurality of thin film transistors, and the storage capacitor and/or at least one of the plurality of thin film transistors are located within the non-display area.