US-20260128011-A1 - DISPLAY DEVICE

US20260128011A1US 20260128011 A1US20260128011 A1US 20260128011A1US-20260128011-A1

Abstract

A display device includes: a base layer; a plurality of scan lines configured to sequentially receive scan signals, the plurality of scan lines being on the base layer; a plurality of pixels on the base layer and connected to each of the plurality of scan lines; a plurality of sensing control lines configured to simultaneously receive sensing control signals, the sensing control lines being on the base layer; and a plurality of sensors on the base layer and connected to respective ones of the sensing control lines, wherein the scan line and the sensing control line are on the same layer.

Inventors

Heejean PARK
Heerim SONG
Yujin Lee
Cheol-Gon LEE
Mukyung JEON

Assignees

SAMSUNG DISPLAY CO., LTD.

Dates

Publication Date: 20260507
Application Date: 20251222
Priority Date: 20220407

Claims (19)

1 . A display device comprising: a base layer; a plurality of write scan lines configured to sequentially receive write scan signals, the plurality of write scan lines being on the base layer; a plurality of pixels on the base layer and connected to the plurality of write scan lines, respectively; a plurality of sensing control lines configured to simultaneously receive sensing control signals, the sensing control lines being on the base layer; and a plurality of sensors on the base layer and connected to the plurality of sensing control lines and the plurality of write scan lines, respectively, wherein each of the sensors includes: a light sensing unit; and a sensor drive circuit on the base layer and electrically connected with the light sensing unit, the sensor drive circuit being configured to receive a sensing control signal from among the sensing control signals through a sensing control line from among the sensing control lines and a write scan signal from among the write scan signals through a write scan line from among the write scan lines, wherein the sensor drive circuit includes: a reset transistor including a first electrode connected with a reset receiving line configured to receive a reset voltage, a second electrode connected with a first sensing node, and a third electrode connected with the sensing control line; an amplifying transistor including a first electrode connected with a sensing drive line configured to receive a sensing drive voltage, a second electrode connected with a second sensing node, and a third electrode connected with the first sensing node; and an output transistor including a first electrode connected with the second sensing node, a second electrode connected with a sensing line, and a third electrode connected with the write scan line configured to receive the write scan signal, and wherein the reset transistor is an oxide semiconductor.
2 . The display device of claim 1 , wherein each of the pixels includes: a light emitting element; and a pixel drive circuit on the base layer and electrically connected with the light emitting element, the pixel drive circuit being configured to receive the write scan signal through the write scan line.
3 . The display device of claim 2 , further comprising: a plurality of compensation scan lines configured to sequentially receive a plurality of compensation scan signals, the plurality of compensation scan lines being on the base layer, a plurality of initialization scan lines configured to sequentially receive a plurality of initialization scan signals, the plurality of initialization scan lines being on the base layer, and a plurality of black scan lines configured to sequentially receive a plurality of black scan signals.
4 . The display device of claim 3 , wherein a compensation scan line from among the compensation scan lines and a sensing control line from among the sensing control lines are on a same layer.
5 . The display device of claim 4 , wherein the pixel drive circuit includes: a drive transistor including a first electrode connected with a first drive voltage line configured to receive a first drive voltage, a second electrode connected with the light emitting element, and a third electrode connected with a first reference node; a switching transistor including a first electrode connected with a data line configured to receive a data signal, a second electrode connected with the first electrode of the drive transistor, and a third electrode connected with the write scan line configured to receive the write scan signal; a compensation transistor including a first electrode connected with the second electrode of the drive transistor, a second electrode connected with the first reference node, and a third electrode connected with the compensation scan line configured to receive a compensation scan signal from among the compensation scan signals; and an initialization transistor including a first electrode connected with the first reference node, a second electrode connected with a first initialization line configured to receive a first initialization voltage, and a third electrode configured to receive an initialization scan signal from among the initialization scan signals through an initialization scan line from among the initialization scan lines.
6 . The display device of claim 5 , wherein each of the compensation transistor and the initialization transistor is an oxide semiconductor.
7 . The display device of claim 5 , wherein the pixel drive circuit further includes: a black scan transistor including a first electrode connected with a second initialization line configured to receive a second initialization voltage, a second electrode connected with the light emitting element, and a third electrode configured to receive a black scan signal from among the black scan signals through a black scan line from among the black scan lines.
8 . The display device of claim 7 , wherein the second initialization voltage and the reset voltage have same voltage.
9 . The display device of claim 5 , wherein the pixel drive circuit and the sensor drive circuit are spaced apart from each other in a plan view.
10 . The display device of claim 9 , wherein the reset receiving line extends in a first direction and is on a different layer from the compensation scan line and the sensing control line.
11 . The display device of claim 10 , wherein the reset receiving line includes: a first reset line extending in the first direction; and a second reset line electrically connected with the first reset line and extending in a second direction, wherein the first reset line is on a same layer as the first drive voltage line, and wherein the second reset line is on a same layer as the data line.
12 . The display device of claim 2 , wherein the light sensing unit includes k light sensing elements, wherein each of the k light sensing elements includes: a first anode electrode; a photoelectric conversion layer on the first anode electrode; and a first cathode electrode on the photoelectric conversion layer, wherein the sensor drive circuit is directly connected to the first anode electrode of one light sensing element, and wherein k is a natural number of 2 or larger.
13 . The display device of claim 12 , wherein each of the sensors further includes a routing wire configured to electrically connect the k light sensing elements, and wherein the routing wire electrically connects k anode electrodes of the k light sensing elements to each other.
14 . The display device of claim 12 , wherein the light emitting element includes: a second anode electrode electrically connected with the second electrode of a drive transistor of the pixel drive circuit; a light emitting layer on the second anode electrode; and a second cathode electrode on the light emitting layer, wherein the second cathode electrode is electrically connected with first cathode electrodes of the k light sensing elements, and wherein the first anode electrode of the one light sensing element is directly connected with the first sensing node.
15 . An electronic device comprising: a display panel; and a housing having an inner space for accommodating the display panel, wherein the display panel comprising: a base layer; a plurality of write scan lines configured to sequentially receive write scan signals, the plurality of write scan lines being on the base layer; a plurality of pixels on the base layer and connected to the plurality of write scan lines, respectively; a plurality of sensing control lines configured to simultaneously receive sensing control signals, the sensing control lines being on the base layer; and a plurality of sensors on the base layer and connected to the plurality of sensing control lines and the plurality of write scan lines, respectively, wherein each of the sensors includes: a light sensing unit; and a sensor drive circuit on the base layer and electrically connected with the light sensing unit, the sensor drive circuit being configured to receive a sensing control signal from among the sensing control signals through a sensing control line from among the sensing control lines and a write scan signal from among the write scan signals through a write scan line from among the write scan lines, wherein the sensor drive circuit includes: a reset transistor including a first electrode connected with a reset receiving line configured to receive a reset voltage, a second electrode connected with a first sensing node, and a third electrode connected with the sensing control line; an amplifying transistor including a first electrode connected with a sensing drive line configured to receive a sensing drive voltage, a second electrode connected with a second sensing node, and a third electrode connected with the first sensing node; and an output transistor including a first electrode connected with the second sensing node, a second electrode connected with a sensing line, and a third electrode connected with the write scan line configured to receive the write scan signal.
16 . The electronic device of claim 15 , wherein each of the pixels includes: a light emitting element; and a pixel drive circuit on the base layer and electrically connected with the light emitting element, the pixel drive circuit being configured to receive the write scan signal through the write scan line.
17 . The electronic device of claim 16 , wherein the pixel drive circuit includes: a drive transistor including a first electrode connected with a first drive voltage line configured to receive a first drive voltage, a second electrode connected with the light emitting element, and a third electrode connected with a first reference node; a switching transistor including a first electrode connected with a data line configured to receive a data signal, a second electrode connected with the first electrode of the drive transistor, and a third electrode connected with the write scan line configured to receive the write scan signal; a compensation transistor including a first electrode connected with the second electrode of the drive transistor, a second electrode connected with the first reference node, and a third electrode connected with a compensation scan line configured to receive a compensation scan signal from among the compensation scan signals; and a black scan transistor including a first electrode connected with an initialization line configured to receive an initialization voltage, a second electrode connected with the light emitting element, and a third electrode connected with receive a black scan signal from among the black scan signals through a black scan line from among the black scan lines.
18 . The electronic device of claim 17 , wherein the initialization voltage and the reset voltage have a same voltage.
19 . The electronic device of claim 17 , wherein each of the reset transistor and the compensation transistor is an oxide semiconductor.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS This application is a continuation of U.S. patent application Ser. No. 18/966,112, filed Dec. 2, 2024, which is a continuation of U.S. patent application Ser. No. 18/102,563, filed Jan. 27, 2023, now U.S. Pat. No. 12,159,580, which claims priority to and the benefit of Korean Patent Application No. 10-2022-0043408, filed Apr. 7, 2022, the entire content of all of which is incorporated herein by reference. BACKGROUND 1. Field Aspects of some embodiments of the present disclosure described herein relate to a display device. 2. Description of Related Art A display device provides various functions for communication with users. For example, the display device may display images to provide information to the user, or may sense an input of the user. Recent display devices include a function of sensing biometric information of a user. Biometric information may be recognized, for example, by using a capacitive sensing technique for sensing a change in capacitance formed between electrodes, a light sensing technique for sensing incident light using an optical sensor, or an ultrasonic sensing technique for sensing vibration using a piezoelectric element. The above information disclosed in this Background section is only for enhancement of understanding of the background and therefore the information discussed in this Background section does not necessarily constitute prior art. SUMMARY Aspects of some embodiments of the present disclosure described herein relate to a display device, and for example, relate to a display device capable of biometric information recognition. Aspects of some embodiments of the present disclosure include a display device having relatively improved sensing performance of a sensor for biometric information recognition. According to some embodiments, a display device includes a base layer, a plurality of scan lines to which a scan signal is sequentially supplied, the plurality of scan lines being on the base layer, and a plurality of pixels on the base layer and connected to each of the plurality of scan lines. The display device includes a plurality of sensing control lines to which a sensing control signal is simultaneously supplied, the sensing control lines being on the base layer, and a plurality of sensors on the base layer and connected to each of the sensing control lines. The scan line and the sensing control line are on the same layer. According to some embodiments of the present disclosure, each of the pixels may include a light emitting element and a pixel drive circuit that is on the base layer and electrically connected with the light emitting element and that receives the scan signal through the scan line. Each of the sensors may include a light sensing unit and a sensor drive circuit that is on the base layer and electrically connected with the light sensing unit and that receives the sensing control signal through the sensing control line. According to some embodiments of the present disclosure, the sensor drive circuit may include a reset transistor including a first electrode connected with a reset receiving line that receives a reset voltage, a second electrode connected with a first sensing node, and a third electrode connected with the sensing control line. The sensor drive circuit may include an amplifying transistor including a first electrode connected with a sensing drive line that receives a sensing drive voltage, a second electrode connected with a second sensing node, and a third electrode connected with the first sensing node. The sensor drive circuit may include an output transistor including a first electrode connected with the second sensing node, a second electrode connected with a sensing line, and a third electrode connected with an output control line that receives an output control signal. According to some embodiments of the present disclosure, the pixel drive circuit may include a drive transistor including a first electrode connected with a first drive voltage line that receives a first drive voltage, a second electrode connected with the light emitting element, and a third electrode connected with a first reference node. The pixel drive circuit may include a switching transistor including a first electrode connected with a data line that receives a data signal, a second electrode connected with the first electrode of the drive transistor, and a third electrode connected with a write scan line that receives a write scan signal. The pixel drive circuit may include a compensation transistor including a first electrode connected with the second electrode of the drive transistor, a second electrode connected with the first reference node, and a third electrode connected with a compensation scan line that receives a compensation scan signal. According to some embodiments of the present disclosure, the scan signal may include the compensation scan signal, and the plurality of scan lines may include the compensation sca