DISPLAY DEVICE

• US 20170133441A1
• Filed: 07/26/2016
• Published: 05/11/2017
• Est. Priority Date: 11/11/2015
• Status: Active Grant

• Current Assignee: Samsung Display Company Limited (Samsung Group)
• Original Assignee: Samsung Display Company Limited (Samsung Group)
• Inventors: YOO, Byung Han, KIM, Young Chan, PARK, Kyung Tea, YEO, Yong-Suk
• Granted Patent: US 10,096,661 B2
• Time in Patent Office: Days
• CPC Class Codes: H10K 2102/3031 Two-side emission, e.g. transparent OLEDs [TOLED]
• CPC Class Codes: H10K 50/856 comprising reflective means
• CPC Class Codes: H10K 59/00 Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
• CPC Class Codes: H10K 59/12 Active-matrix OLED [AMOLED] displays
• 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 59/88 Dummy elements, i.e. elements having non-functional features

Abstract

A display device includes: a display panel including a display area for displaying an image; a window provided on an upper portion of the display panel; a protection plate provided on a lower portion of the display panel; and a photosensor provided at least one of between the display panel and the window and between the display panel and the protection plate, wherein the photosensor includes a shutter for controlling light emitted by the display panel to transmit through the window or the protection plate, and a photodetector for receiving the light reflected after transmitting through the window or the protection plate.

Claims

1. A display device comprising:

a display panel including a display area for displaying an image;

a window provided on an upper portion of the display panel;

a protection plate provided on a lower portion of the display panel; and

a photosensor provided at least one of between the display panel and the window and between the display panel and the protection plate,

wherein the photosensor includes;

a shutter for controlling light emitted by the display panel to transmit through the window or the protection plate, and

a photodetector for receiving the light reflected after transmitting through the window or the protection plate.

2. The display device of claim 1, wherein

the photosensor is disposed on a position corresponding to the display area between the display panel and the protection plate.

3. The display device of claim 2, wherein

the display panel includes an organic light-emitting diode of a double-side emission type provided in the display area.

4. The display device of claim 3, wherein

the organic light emitting diode includes:

a first electrode connected to a thin film transistor provided on a substrate;

an organic emission layer provided on the first electrode; and

a second electrode provided on the organic emission layer,

wherein the first and second electrodes are transparent electrodes.

5. The display device of claim 4, wherein

the thin film transistor includes:

a semiconductor layer provided on the substrate;

a gate electrode provided on the semiconductor layer; and

a source electrode and a drain electrode provided on the gate electrode and connected to the semiconductor layer.

6. The display device of claim 1, wherein

the display panel further includes a peripheral area disposed on a periphery of the display area, and

the photosensor is disposed on a position corresponding to the peripheral area between the display panel and the protection plate.

7. The display device of claim 6, wherein

the display panel includes a dummy pixel provided in the peripheral area.

8. The display device of claim 7, wherein

the dummy pixel is an organic light-emitting diode of a bottom-emission type.

9. The display device of claim 8, wherein

the organic light emitting diode includes:

a first electrode connected to a thin film transistor provided on a substrate;

an organic emission layer provided on the first electrode; and

a second electrode provided on the organic emission layer,

wherein the first electrode is a transparent electrode, and the second electrode is a reflecting electrode.

10. The display device of claim 1, wherein

the display panel further includes a peripheral area disposed on a periphery of the display area, and

the photosensor is disposed on a position corresponding to the peripheral area between the display panel and the window.

11. The display device of claim 10, wherein

the display panel includes a dummy pixel provided in the peripheral area.

12. The display device of claim 11, wherein

the dummy pixel is an organic light-emitting diode of a top-emission type.

13. The display device of claim 12, wherein

the organic light emitting diode includes:

a first electrode connected to a thin film transistor provided on a substrate;

an organic emission layer provided on the first electrode; and

a second electrode provided on the organic emission layer,

wherein the first electrode is a reflecting electrode, and second electrode is a transparent electrode.

14. The display device of claim 1, wherein

the photodetector includes at least one photodiode.

15. The display device of claim 1, wherein

the protection plate includes a light transmitting window on a position corresponding to the photosensor.

16. The display device of claim 1, wherein

the shutter includes first and second blocking plates that can be controlled to be opened and closed.

17. The display device of claim 16, wherein

the first and second blocking plates are bent.

18. The display device of claim 16, wherein

the first and second blocking plates are made of a conductive material.

19. The display device of claim 16, wherein

the shutter further includes an induction electrode provided on at least one of an upper side and a lower side of the first and second blocking plates and generating an electric force.

20. The display device of claim 16, wherein

a reflective layer is provided on the first and second blocking plates.

21. The display device of claim 20, wherein

the reflective layer is made of a metal selected from silver (Ag), aluminum (Al), and chromium (Cr), or an alloy thereof.

22. The display device of claim 16, wherein

a first end of the first and second blocking plates is inclined at a predetermined angle, and a second end of the first and second blocking plates is made of a shape corresponding to the first end.

23. The display device of claim 16, wherein

a first end of the first and second blocking plates is provided to have a step shape, and a second end of the first and second blocking plates is made of a shape corresponding to the first end.