Display device

• US 10,665,583 B2
• Filed: 04/17/2019
• Issued: 05/26/2020
• Est. Priority Date: 01/25/2017
• Status: Active Grant

• Current Assignee: InnoLux Corporation
• Original Assignee: InnoLux Corporation
• Inventors: Chen, Jia-Yuan, Lin, Hsiao-Lang, Yueh, Jui-Jen, Lee, Kuan-Feng
• Primary Examiner(s): Coughlin, Andrew J
• Application Number:
  US16/387,484
• Publication Number:
  US 20190252365A1
• Time in Patent Office: 405 Days
• CPC Class Codes: C09K 2323/00 Functional layers of liquid crystal optical display excluding electroactive liquid crystal layer characterised by chemical composition
• CPC Class Codes: C09K 2323/03 Viewing layer characterised by chemical composition
• CPC Class Codes: G02F 1/13306 Circuit arrangements or driving methods for the control of single liquid crystal cells G02F1/132, G02F1/133382 take precedence
• CPC Class Codes: G02F 1/133305 Flexible substrates, e.g. plastics, organic film
• CPC Class Codes: G02F 1/133308 Support structures for LCD panels, e.g. frames or bezels
• CPC Class Codes: G02F 1/1343 Electrodes reflective electrodes G02F1/133553
• CPC Class Codes: G02F 1/1347 Arrangement of liquid crystal layers or cells in which the final condition of one light beam is achieved by the addition of the effects of two or more layers or cells
• CPC Class Codes: G02F 1/1533 structural features not otherwise provided for
• CPC Class Codes: G09F 9/301 flexible foldable or roll-able electronic displays, e.g. thin LCD, OLED
• CPC Class Codes: H01L 27/016 Thin-film circuits
• CPC Class Codes: H01L 27/0218 of field effect structures
• CPC Class Codes: H01L 27/1251 comprising TFTs having a different architecture, e.g. top- and bottom gate TFTs
• CPC Class Codes: H01L 29/0653 adjoining the input or output region of a field-effect device, e.g. the source or drain region
• CPC Class Codes: H01L 29/41733 for thin film transistors with insulated gate
• CPC Class Codes: H01L 29/786 Thin film transistors, i.e. transistors with a channel being at least partly a thin film transistors having only the source or the drain region on an insulator layer H01L29/0653; thin film FinFETs H01L29/785
• CPC Class Codes: H10K 2102/311 Flexible OLED
• CPC Class Codes: H10K 50/8445 multilayered coatings having a repetitive structure, e.g. having multiple organic-inorganic bilayers
• 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 77/111 Flexible substrates
• CPC Class Codes: Y02E 10/549 : Organic PV cells

Abstract

A display device includes a light-emitting unit and a light conversion layer disposed on the light-emitting unit. The light conversion layer includes plural quantum dot portions and a first shielding portion surrounding the plural quantum dot portions. One of the plural quantum dot portions has a surface, and at least a part of the surface is a curved surface. A first thickness of the first shielding portion is greater than a maximum thickness of one of the plural quantum dot portions.

Claims

1. A display device, comprising:

a light-emitting unit;

a light conversion layer, disposed on the light-emitting unit, the light conversion layer including plural quantum dot portions and a first shielding portion surrounding the plural quantum dot portions; and

a second shielding portion disposed between the light-emitting unit and the first shielding portion,

wherein one of the plural quantum dot portions has a surface, at least a part of the surface is a curved surface, the second shielding portion overlaps the first shielding portion, a first width of the first shielding portion is less than a second width of the second shielding portion, and a first thickness of the first shielding portion is greater than a maximum thickness of one of the plural quantum dot portions.

2. The display device of claim 1, wherein the one of the plural quantum dot portions comprises different thicknesses.

3. The display device of claim 2, wherein a lowest point of the curved surface is disposed between a highest point of the curved surface and the first shielding portion.

4. The display device of claim 1, further comprising:

a substrate; and

a transistor disposed on the substrate.

5. The display device of claim 4, wherein the light-emitting unit is electrically connected to the transistor.

6. The display device of claim 1, wherein at least one of the first shielding portion and the second shielding portion overlaps a transistor.

7. The display device of claim 1, wherein the second shielding portion has a second thickness, and a ratio of the first thickness to the second thickness is between 1.5 and 650.

8. The display device of claim 1, wherein a difference between the second width and the first width is between 2 μ

m and 62 μ

m.

9. The display device of claim 1, wherein the second shielding portion overlaps a portion of the light-emitting unit.

10. The display device of claim 1, further comprising a reflective portion disposed between the first shielding portion and the plural quantum dot portions.

11. The display device of claim 1, wherein the first shielding portion dose not overlap the plural quantum dot portions.

12. The display device of claim 1, wherein the light conversion layer includes a transparent layer disposed in plural openings of the first shielding portion.

13. The display device of claim 12, wherein a filter portion is disposed on at least one of the plural quantum dot portions and the transparent layer.

14. The display device of claim 1, wherein a concentration of quantum dot particles in one of the plural quantum dot portions is between 0.3 wt % and 13.4 wt %.

15. The display device of claim 1, wherein the light-emitting unit comprises a light emitting diode, a micro light emitting diode, an organic light emitting diode, or a UV light emitting diode.

16. The display device of claim 1, further comprising an insulating layer and a passivation layer, wherein the light-emitting unit is disposed between the insulating layer and the passivation layer.

17. The display device of claim 1, further comprising a pixel defining layer, wherein the light-emitting unit is disposed in the pixel defining layer.

18. The display device of claim 1, wherein the first shielding portion includes two or more first shielding units stacked with each other, and the two or more first shielding units respectively include different materials.

19. The display device of claim 1, wherein the plural quantum dot portions comprise a first quantum dot portion converting a light emitted from the light-emitting unit into a light of a first color, and the plural quantum dot portions further comprise a second quantum dot portion converting a light emitted from the light-emitting unit into a light of a second color.