DISPLAY DEVICE

• US 20170084867A1
• Filed: 09/21/2016
• Published: 03/23/2017
• Est. Priority Date: 09/21/2015
• Status: Active Grant

• Current Assignee: LG Display Co., Ltd.
• Original Assignee: LG Display Co., Ltd.
• Inventors: LIM, HeeChul, HAN, GyuHyeong
• Granted Patent: US 10,224,515 B2
• Time in Patent Office: Days
• CPC Class Codes: G02B 2027/0118 comprising devices for improving the contrast of the display / brillance control visibility
• CPC Class Codes: G02B 27/017 Head mounted
• CPC Class Codes: G02B 27/0172 characterised by optical features
• CPC Class Codes: G02B 5/207 comprising semiconducting materials
• CPC Class Codes: G02B 5/22 Absorbing filters G02B5/201 - G02B5/208 take precedence
• CPC Class Codes: H10K 50/844 Encapsulations
• CPC Class Codes: H10K 50/8445 multilayered coatings having a repetitive structure, e.g. having multiple organic-inorganic bilayers
• CPC Class Codes: H10K 50/865 comprising light absorbing layers, e.g. light-blocking layers
• CPC Class Codes: H10K 59/12 Active-matrix OLED [AMOLED] displays
• CPC Class Codes: H10K 59/873 Encapsulations
• CPC Class Codes: H10K 59/8731 multilayered coatings having a repetitive structure, e.g. having multiple organic-inorganic bilayers
• CPC Class Codes: H10K 59/879 comprising refractive means, e.g. lenses
• CPC Class Codes: H10K 59/8792 comprising light absorbing layers, e.g. black layers
• CPC Class Codes: Y02P 70/50 Manufacturing or production processes characterised by the final manufactured product

Abstract

Discussed herein is an organic light-emitting display (OLED) device that may include an organic light-emitting element layer disposed on a substrate; and an encapsulation layer covering the organic light-emitting element layer to block moisture and/or oxygen from permeating, wherein the encapsulation layer includes a barrier film having at least one transmittance adjusting layer that adjusts a ratio at which light emitted from the organic light-emitting element layer exits the OLED device, whereby the use of a polarizer is avoided.

Claims

1. A organic light-emitting display (OLED) device comprising:

an organic light-emitting element layer on a substrate; and

an encapsulation layer covering the organic light-emitting element layer and configured to block moisture and oxygen from permeating,

wherein the encapsulation layer includes a barrier film having at least one transmittance adjusting layer that adjusts a transmittance ratio of light emitted from the organic light-emitting element layer.

2. The OLED device of claim 1, wherein the at least one transmittance adjusting layer is configured to adjust a transmittance of the light emitted from the organic light-emitting element layer to provide luminance required for implementing virtual reality.

3. The OLED device of claim 2, wherein the at least one transmittance adjusting layer is configured to adjust the transmittance rate of the light emitted from the organic emission layer to 40 to 60%.

4. The OLED device of claim 3, wherein the at least one transmittance adjusting layer includes a plurality of layers disposed above and below a barrier coating layer.

5. The OLED device of claim 4, wherein the at least one transmittance adjusting layers includes two to seven layers.

6. The OLED device of claim 4, wherein each of the transmittance adjusting layers has a refractive index of 0.2 or higher and a thickness of 0.01 μ

m to 1 μ

m.

7. The OLED device of claim 1, wherein the encapsulation layer includes an adhesive layer configured to attach the barrier film to the organic light-emitting element layer, and

wherein the adhesive layer is made of a curable resin containing an adsorbent material.

8. The OLED device of claim 7, wherein the adhesive layer includes a light-absorbing material for adjusting transmittance.

9. The OLED device of claim 7, wherein the adhesive layer and the at least one transmittance adjusting layer are configured to allow the light emitted from the organic light-emitting element layer to pass through the adhesive layer and the at least one transmittance adjusting layer at a resulting transmittance rate of 40 to 60%.

10. The OLED device of claim 9, wherein the adhesive layer and the at least one transmittance adjusting layer reduce a luminance on behalf of a polarizing plate, to thus forego a use of the polarizing plate.

11. An organic light-emitting display (OLED) device employed by equipment for implementing virtual reality, the OLED device comprising:

an encapsulation layer having a structure for adjusting transmittance to provide luminance characteristics for a display device for implementing virtual reality image display characteristics.

12. The OLED device of claim 11, wherein the structure for adjusting transmittance is configured to adjust a transmittance of light generated in an organic light-emitting element so that the OLED device exhibits a luminance according to use environment for implementing the virtual reality image display characteristics.

13. The OLED device of claim 12, wherein the structure for adjusting transmittance includes a transmittance adjusting layer in a barrier film and an adhesive film.

14. The OLED device of claim 13, wherein the structure for adjusting transmittance is configured to allow the light generated from the organic light-emitting element to be emitted from the OLED device at a transmittance rate of 40 to 60%.

15. A barrier film that suppresses at least one of moisture and oxygen from permeating into an organic light-emitting element and has a multi-layer structure, the barrier film comprising:

at least one transmittance adjusting layer configured to adjust a transmittance of light emitted from the organic light-emitting element to fall within a particular range for a polarizing plate that is not used.

16. The barrier film of claim 15, wherein the particular range is determined based on a luminance required by a display device for implementing virtual reality image display characteristics.