Display device having transmittance adjusting layer

• US 10,224,515 B2
• Filed: 09/21/2016
• Issued: 03/05/2019
• 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
• Primary Examiner(s): Schoenholtz, Joseph
• Application Number:
  US15/271,956
• Publication Number:
  US 20170084867A1
• Time in Patent Office: 895 Days
• Field of Search: None
• 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. An organic light-emitting display (OLED) device comprising:

an organic light-emitting element on a substrate; and

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

wherein the encapsulation layer includes a barrier film having a barrier coating layer and a plurality of transmittance adjusting layers that adjust a transmittance ratio of light emitted from the organic light-emitting element and an adhesive film configured to attach the barrier film to the organic light-emitting element,

wherein the barrier coating layer is made of a flexible transparent polymer resin, and the plurality of transmittance adjusting layers are made of silicon oxide (Si-Oxide) or titanium oxide (Ti-Oxide), and the plurality of transmittance adjusting layers are disposed above and below the barrier coating layer, and

wherein the adhesive film includes a light-absorbing material for adjusting a transmittance of the light.

2. The OLED device of claim 1, wherein the plurality of transmittance adjusting layers are configured to adjust the transmittance of the light emitted from the organic light-emitting element to provide luminance required for implementing virtual reality.

3. The OLED device of claim 1, wherein the plurality of transmittance adjusting layers include two to seven layers.

4. The OLED device of claim 1, wherein each of the plurality of transmittance adjusting layers has a thickness of 0.01 μ

m to 1 μ

m.

5. The OLED device of claim 1, wherein the adhesive layer and the plurality of transmittance adjusting layers are configured to allow the light emitted from the organic light-emitting element to pass through the adhesive layer and the plurality of transmittance adjusting layers at a resulting total transmittance of 40 to 60%.

6. The OLED device of claim 5, wherein the adhesive layer and the plurality of transmittance adjusting layers reduce a luminance on behalf of a polarizing plate, to thus forego a use of the polarizing plate.

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

a structure for adjusting transmittance to provide luminance characteristics for a display device for implementing virtual reality image display characteristics,

wherein the structure for adjusting transmittance includes a barrier film and an adhesive film, the barrier film comprising a barrier coating layer and a plurality of transmittance adjusting layers, and the adhesive film having a light-absorbing material, and

wherein the barrier coating layer is made of a flexible and transparent polymer resin and is configured for suppressing at least one of oxygen and moisture from permeating, and the plurality of transmittance adjusting layers are disposed above and below the barrier coating layer.

8. The OLED device of claim 7, 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.