Organic light emitting diode display device

• US 10,283,578 B2
• Filed: 09/01/2017
• Issued: 05/07/2019
• Est. Priority Date: 09/07/2016
• Status: Active Grant

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Inventors: Ka, Jihyun, Kwak, Wonkyu, Bae, Hansung
• Primary Examiner(s): Nicely, Joseph C.
• Application Number:
  US15/693,908
• Publication Number:
  US 20180069068A1
• Time in Patent Office: 613 Days
• CPC Class Codes: G06V 40/1306 non-optical, e.g. ultrasonic or capacitive sensing
• CPC Class Codes: G09G 2310/0251 Precharge or discharge of pixel before applying new pixel voltage
• CPC Class Codes: G09G 2310/0262 The addressing of the pixel, in a display other than an active matrix LCD, involving the control of two or more scan electrodes or two or more data electrodes, e.g. pixel voltage dependent on signals of two data electrodes
• CPC Class Codes: G09G 2354/00 Aspects of interface with display user
• CPC Class Codes: G09G 3/3233 with pixel circuitry controlling the current through the light-emitting element
• CPC Class Codes: H01L 27/1225 with semiconductor materials not belonging to the group IV of the periodic table, e.g. InGaZnO
• CPC Class Codes: H01L 29/78633 with a light shield
• CPC Class Codes: H01L 31/1129 the device being a field-effect phototransistor
• CPC Class Codes: H01L 31/1136 the device being a metal-insulator-semiconductor field-effect transistor
• CPC Class Codes: H10K 2102/00 Constructional details relating to the organic devices covered by this subclass
• CPC Class Codes: H10K 50/00 Organic light-emitting devices integrated devices or assemblies of multiple devices H10K59/00, H10K65/00; organic semiconductor lasers H01S5/36
• CPC Class Codes: H10K 50/844 Encapsulations
• CPC Class Codes: H10K 59/1213 the pixel elements being TFTs
• CPC Class Codes: H10K 59/122 Pixel-defining structures or layers, e.g. banks
• CPC Class Codes: H10K 59/126 Shielding, e.g. light-blocking means over the TFTs
• CPC Class Codes: H10K 59/60 OLEDs integrated with inorganic light-sensitive elements, e.g. with inorganic solar cells or inorganic photodiodes
• CPC Class Codes: H10K 59/65 OLEDs integrated with inorganic image sensors
• CPC Class Codes: H10K 59/8731 multilayered coatings having a repetitive structure, e.g. having multiple organic-inorganic bilayers
• CPC Class Codes: Y02E 10/50 Photovoltaic [PV] energy

Abstract

An organic light emitting diode display device includes a substrate, a plurality of organic light emitting diodes on the substrate, a thin film encapsulation layer on the organic light emitting diodes, and at least one sensor on the thin film encapsulation layer, the sensor including a sensing gate electrode, an oxide semiconductor layer overlapping the sensing gate electrode, a sensing source electrode connected to the oxide semiconductor layer, and a sensing drain electrode spaced apart from the sensing source electrode and connected to the oxide semiconductor layer.

Claims

1. An organic light emitting diode display device, comprising:

a substrate;

a plurality of organic light emitting diodes on the substrate;

a thin film encapsulation layer on the organic light emitting diodes; and

at least one sensor on the thin film encapsulation layer, the sensor including;

a sensing gate electrode;

an oxide semiconductor layer overlapping the sensing gate electrode;

a sensing source electrode connected to the oxide semiconductor layer; and

a sensing drain electrode spaced apart from the sensing source electrode and connected to the oxide semiconductor layer.

2. The organic light emitting diode display device as claimed in claim 1, wherein the sensor is between adjacent organic light emitting diodes.

3. The organic light emitting diode display device as claimed in claim 1, wherein each organic light emitting diode of the plurality of organic light emitting diodes includes:

a first electrode;

an organic light emitting layer on the first electrode; and

a second electrode on the organic light emitting layer,

wherein the sensing gate electrode is spaced apart from the first electrode in a lateral direction.

4. The organic light emitting diode display device as claimed in claim 3, further comprising a pixel defining layer between the first electrodes, the sensor vertically overlapping the pixel defining layer.

5. The organic light emitting diode display device as claimed in claim 1, wherein the oxide semiconductor layer includes at least one of:

zinc oxide (ZnO), zinc-tin oxide (ZTO), zinc-indium oxide (ZIO), indium oxide (InO), titanium oxide (TiO), indium-gallium-zinc oxide (IGZO), and indium-zinc-tin oxide (IZTO).

6. The organic light emitting diode display device as claimed in claim 1, wherein the oxide semiconductor layer has photoreactivity.

7. The organic light emitting diode display device as claimed in claim 1, wherein the oxide semiconductor layer absorbs a visible light.

8. The organic light emitting diode display device as claimed in claim 7, wherein the visible light changes an electric charge mobility of the oxide semiconductor layer.

9. The organic light emitting diode display device as claimed in claim 7, wherein the oxide semiconductor layer has an electric charge mobility varying according to a wavelength of the visible light.

10. The organic light emitting diode display device as claimed in claim 1, wherein the oxide semiconductor layer has thermal sensitivity.

11. The organic light emitting diode display device as claimed in claim 1, wherein the oxide semiconductor layer absorbs an infrared light, and the infrared light changes an electric charge mobility of the oxide semiconductor layer.

12. The organic light emitting diode display device as claimed in claim 1, wherein the organic light emitting diode is connected to a thin film transistor,

the thin film transistor is connected to a gate line on the substrate and a data line on the substrate, the data line intersecting the gate line,

the sensing gate electrode is connected to a reset line parallel to one of the gate line and the data line, and

the sensing source electrode is connected to a sensor power line parallel to another of the gate line and the data line.

13. The organic light emitting diode display device as claimed in claim 12, wherein the sensing drain electrode is connected to an output line parallel to one of the gate line and the data line.

14. The organic light emitting diode display device as claimed in claim 1, further comprising a light blocking layer between the thin film encapsulation layer and the sensor.

15. The organic light emitting diode display device as claimed in claim 1, further comprising a color filter on the sensor.

16. The organic light emitting diode display device as claimed in claim 1, wherein the sensor is a fingerprint recognition sensor.

17. The organic light emitting diode display device as claimed in claim 1, wherein the thin film encapsulation layer includes a laminate of inorganic and organic layers, the inorganic and organic layers being interposed between the oxide semiconductor layer and an upper electrode of the organic light emitting diode.

18. An organic light emitting diode device, comprising;

a substrate;

a plurality of organic light emitting diodes on the substrate;

a thin film encapsulation layer on the organic light emitting diodes; and

a fingerprint recognition sensor on the thin film encapsulation layer, the fingerprint recognition sensor including at least one sensor that includes;

a sensing gate electrode;

an oxide semiconductor layer overlapping the sensing gate electrode;

a sensing source electrode connected to the oxide semiconductor layer; and

a sensing drain electrode spaced apart from the sensing source electrode and connected to the oxide semiconductor layer.

19. The organic light emitting diode display device as claimed in claim 18, further comprising a fingerprint recognition storage storing a fingerprint information of a user.

20. The organic light emitting diode display device as claimed in claim 18, further comprising a pixel defining layer between the organic light emitting diodes, the sensor vertically overlapping the pixel defining layer.