DISPLAY DEVICE AND MANUFACTURING METHOD THEREOF

• US 20160221293A1
• Filed: 06/15/2015
• Published: 08/04/2016
• Est. Priority Date: 02/04/2015
• Status: Active Grant

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Inventors: PARK, Kyoung Woo
• Granted Patent: US 9,676,162 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: B32B 2307/404 Multi-coloured
• CPC Class Codes: B32B 2307/41 Opaque
• CPC Class Codes: B32B 2307/412 Transparent
• CPC Class Codes: B32B 2310/0825 using IR radiation
• CPC Class Codes: B32B 2310/0831 using UV radiation
• CPC Class Codes: B32B 2457/20 Displays, e.g. liquid crystal displays, plasma displays
• CPC Class Codes: B32B 3/02 characterised by features of form at particular places, e.g. in edge regions non-uniform thickness B32B3/263
• CPC Class Codes: B32B 37/14 characterised by the properties of the layers
• CPC Class Codes: B32B 38/145 Printing

Abstract

A display device, including a display panel including a display area and a non-display area, the non-display area surrounding the display area; a window facing the display panel and including a light-transmitting area and a light-blocking area, the light-transmitting area corresponding to the display area, and the light-blocking area corresponding to the non-display area; and a plurality of printed layers on the window in the light-blocking area, each printed layer including an isocyanate-blocking group having a different dissociation temperature from isocyanate-blocking groups included in other printed layers.

Claims

1. A display device, comprising:

a display panel including a display area and a non-display area, the non-display area surrounding the display area;

a window facing the display panel and including a light-transmitting area and a light-blocking area, the light-transmitting area corresponding to the display area, and the light-blocking area corresponding to the non-display area; and

a plurality of printed layers on the window in the light-blocking area,

each printed layer including an isocyanate-blocking group having a different dissociation temperature from isocyanate-blocking groups included in other printed layers.

2. The display device as claimed in claim 1, wherein:

the plurality of printed layers includes first through n-th printed layers (where n is a natural number greater than

     1), which are sequentially deposited, and

a dissociation temperature of the isocyanate-blocking group included in a k-th printed layer (where k is a natural number between 1 and n) is lower than a dissociation temperature of the isocyanate-blocking group included in a (k+1)-th printed layer.

3. The display device as claimed in claim 2, wherein:

the k-th printed layer includes diethylmalonate (DEM), and

the (k+1)-th printed layer includes one or more of 3,5-dimethylpyrazole (DMP), methylethylketoxime (MEKO), or ε

-caprolactam (ε

-CAP).

4. The display device as claimed in claim 2, wherein:

the isocyanate-blocking group included in the first printed layer has a lowest dissociation temperature among all isocyanate-blocking groups included in the plurality of printed layers, and

the isocyanate-blocking group included in the n-th printed layer has a highest dissociation temperature among all isocyanate-blocking groups included in the plurality of printed layers.

5. The display device as claimed in claim 2, wherein the dissociation temperature of the isocyanate-blocking groups increases from the first printed layer to the n-th printed layer.

6. The display device as claimed in claim 2, wherein the n-th printed layer is a shielding printed layer and covers an entirety of the light-blocking area.

7. The display device as claimed in claim 1, wherein the plurality of printed layers is on a first surface or a second surface of the window.

8. The display device as claimed in claim 1, wherein each of the plurality of printed layers has a different color.

9. The display device as claimed in claim 1, wherein the plurality of printed layers forms steps or indentations.

10. A manufacturing method of a display device, comprising:

preparing a display panel including a display area and a non-display area, the non-display area surrounding the display area;

printing a first ink layer on a first surface of a transparent substrate and printing a second ink layer on the first ink layer;

curing the first ink layer at a first temperature;

curing the second ink layer at a second temperature, the second temperature being higher than the first temperature; and

coupling the transparent substrate and the display panel such that the first surface of the transparent substrate faces the display panel.

11. The manufacturing method as claimed in claim 10, wherein:

curing the first ink layer includes applying a first light having a first wavelength to the first ink layer, and

curing the second ink layer includes applying a second light having a second wavelength to the second ink layer, the second wavelength being different from the first wavelength.

12. The manufacturing method as claimed in claim 11, wherein the first light is ultraviolet (UV) light and the second light is infrared (IR) light.

13. The manufacturing method as claimed in claim 11, wherein the first light and the second light are applied from a second surface of the transparent substrate.

14. The manufacturing method as claimed in claim 10, wherein:

curing the first ink layer includes maintaining a first temperature for a predetermined amount of time, and

curing the second ink layer includes maintaining a second temperature for a predetermined amount of time.

15. The manufacturing method as claimed in claim 10, further comprising:

printing a third ink layer on the second ink layer; and

curing the third ink layer at a third temperature, the third temperature being higher than the second temperature.

16. The manufacturing method as claimed in claim 15, wherein:

curing the first ink layer, curing the second ink layer, and curing the third ink layer include applying light to the first ink layer, applying light to the second ink layer and applying light to the third ink layer, respectively, and

the light applied to the first ink layer and the light applied to the second ink layer have different wavelengths from the light applied to the third ink layer.

17. The manufacturing method as claimed in claim 15, wherein curing the first ink layer, curing the second ink layer, and curing the third ink layer include maintaining the first temperature for a predetermined amount of time, maintaining the second temperature for a predetermined amount of time, and maintaining the third temperature for a predetermined amount of time, respectively.

18. The manufacturing method as claimed in claim 15, wherein the first, second, and third ink layers have different colors.

19. The manufacturing method as claimed in claim 10, wherein the first and second ink layers form steps or indentations.

20. The manufacturing method as claimed in claim 10, wherein the first and second ink layers have different colors.