DISPLAY DEVICE AND MANUFACTURING METHOD THEREOF

• US 20160351856A1
• Filed: 03/21/2016
• Published: 12/01/2016
• Est. Priority Date: 06/01/2015
• Status: Active Grant

• Current Assignee: Samsung Display Company Limited (Samsung Group)
• Original Assignee: Samsung Display Company Limited (Samsung Group)
• Inventors: Jung, Haegoo, Ma, Jangseok, Ryu, Dohyung, Song, Jaewoo, Lee, Jaehoon
• Granted Patent: US 10,811,638 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G02B 1/14 Protective coatings, e.g. hard coatings
• CPC Class Codes: G02B 5/3025 Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state G02B5/3008, G02B5/3016 take precedence
• CPC Class Codes: G02B 5/3083 Birefringent or phase retarding elements G02B5/3008, G02B5/3016 take precedence; systems for polarisation control G02B27/286; manufacturing phase modulating patterns by lithographic processes G03F7/001
• CPC Class Codes: H01L 27/124 with a particular composition, shape or layout of the wiring layers specially adapted to the circuit arrangement, e.g. scanning lines in LCD pixel circuits wiring structures per se H01L23/52
• CPC Class Codes: H01L 27/1248 with a particular composition or shape of the interlayer dielectric specially adapted to the circuit arrangement
• CPC Class Codes: H01L 27/1255 integrated with passive devices, e.g. auxiliary capacitors
• CPC Class Codes: H10K 50/86 Arrangements for improving contrast, e.g. preventing reflection of ambient light
• CPC Class Codes: H10K 59/12 Active-matrix OLED [AMOLED] displays
• CPC Class Codes: H10K 59/8791 Arrangements for improving contrast, e.g. preventing reflection of ambient light

Abstract

A display device includes a display panel having a display surface, and a polarizing unit on the display surface of the display panel, the polarizing unit including a linear polarizer that includes at least two portions having different transmittances from each other.

Claims

1. A display device comprising:

a display panel having a display surface; and

a polarizing unit on the display surface of the display panel, the polarizing unit comprising a linear polarizer that comprises at least two portions having different transmittances from each other.

2. The display device of claim 1, wherein the at least two portions of the linear polarizer comprise:

a first portion having a first transmittance; and

a second portion having a second transmittance that is higher than the first transmittance.

3. The display device of claim 2, wherein the first portion corresponds to a center portion of the display panel, and

wherein the second portion corresponds to at least one corner portion of the display panel.

4. The display device of claim 2, wherein the first portion corresponds to a center portion of the display panel, and

wherein the second portion corresponds to at least one edge portion of the display panel.

5. The display device of claim 1, wherein the linear polarizer comprises:

a polyvinyl alcohol-based (“

PVA-based”

) resin; and

a dichroic dye dyed to the PVA-based resin.

6. The display device of claim 5, wherein the PVA-based resin comprises:

a homopolymer of vinyl acetate;

or

a copolymer of vinyl acetate and another monomer.

7. The display device of claim 5, wherein the dichroic dye comprises iodine.

8. The display device of claim 1, wherein the polarizing unit comprises:

an adhesive layer on the display panel; and

a phase retardation layer on the adhesive layer.

9. The display device of claim 1, wherein the display panel comprises:

a first substrate;

a first electrode on the first substrate;

an organic light emitting layer on the first electrode; and

a second electrode on the organic light emitting layer.

10. The display device of claim 9, further comprising a thin film encapsulation layer on the second electrode, the thin film encapsulation layer comprising at least one organic layer alternately stacked with at least one inorganic layer.

11. A method of manufacturing a display device, the method comprising:

forming an adhesive layer on a display surface of a display panel;

forming a phase retardation layer on the adhesive layer for imparting a phase difference;

forming a linear polarizer comprising at least two portions having different transmittances; and

forming a protection layer on the linear polarizer.

12. The method of claim 11, wherein the forming of the linear polarizer comprises:

uniaxially elongating a PVA-based resin film,

dyeing the PVA-based resin film by adhering a dichroic dye thereto; and

selectively detaching the dichroic dye adhered to the PVA-based resin film to form the at least two portions of the linear polarizer.

13. The method of claim 12, wherein the dichroic dye comprises iodine.

14. The method of claim 12, wherein the selectively detaching the dichroic dye comprises using visible light, ultraviolet (UV) ray, or laser.

15. The method of claim 12, wherein the selectively detaching the dichroic dye forms a first portion having a first transmittance, and a second portion having a second transmittance that is higher than the first transmittance.

16. The method of claim 15, wherein the first portion corresponds to a center portion of the display panel, and

wherein the second portion corresponds to at least one corner portion of the display panel.

17. The method of claim 15, wherein the first portion corresponds to a center portion of the display panel, and

wherein the second portion corresponds to at least one edge portion of the display panel.