DISPLAY DEVICE

• US 20200135799A1
• Filed: 10/24/2018
• Published: 04/30/2020
• Est. Priority Date: 10/24/2018
• Status: Abandoned Application

• Current Assignee: InnoLux Corporation
• Original Assignee: InnoLux Corporation
• Inventors: CHEN, Jia-Yuan, TSAI, Tsung-Han, LEE, Kuan-Feng, WU, Yuan-Lin
• Application Number:
  US16/169,098
• Publication Number:
  US 20200135799A1
• Time in Patent Office: Days
• CPC Class Codes: H01L 25/0753 the devices being arranged next to each other
• CPC Class Codes: H01L 27/156 two-dimensional arrays
• CPC Class Codes: H01L 2933/0025 relating to coatings
• CPC Class Codes: H01L 2933/0041 relating to wavelength conversion elements
• CPC Class Codes: H01L 2933/0058 relating to optical field-shaping elements
• CPC Class Codes: H01L 33/005 Processes
• CPC Class Codes: H01L 33/22 Roughened surfaces, e.g. at the interface between epitaxial layers
• CPC Class Codes: H01L 33/44 characterised by the coatings, e.g. passivation layer or anti-reflective coating
• CPC Class Codes: H01L 33/46 Reflective coating, e.g. dielectric Bragg reflector
• CPC Class Codes: H01L 33/504 Elements with two or more wavelength conversion materials
• CPC Class Codes: H01L 33/507 the elements being in intimate contact with parts other than the semiconductor body or integrated with parts other than the semiconductor body
• CPC Class Codes: H01L 33/58 Optical field-shaping elements
• CPC Class Codes: H01L 33/60 Reflective elements
• CPC Class Codes: H10K 50/844 Encapsulations
• CPC Class Codes: H10K 50/854 comprising scattering means
• CPC Class Codes: H10K 50/856 comprising reflective means
• CPC Class Codes: H10K 50/865 comprising light absorbing layers, e.g. light-blocking layers
• CPC Class Codes: H10K 59/1201 Manufacture or treatment
• CPC Class Codes: H10K 59/122 Pixel-defining structures or layers, e.g. banks
• CPC Class Codes: H10K 59/127 comprising two substrates, e.g. display comprising OLED array and TFT driving circuitry on different substrates
• CPC Class Codes: H10K 59/173 : comprising banks or shadow masks
• CPC Class Codes: H10K 59/351 : comprising more than three subpixels, e.g. red-green-blue-white [RGBW]
• CPC Class Codes: H10K 59/38 : comprising colour filters or colour changing media [CCM]
• CPC Class Codes: H10K 71/00 : Manufacture or treatment specially adapted for the organic devices covered by this subclass

Abstract

A display device includes a substrate, a first light-emitting unit, a second light-emitting unit, a first buffer layer, a second buffer layer, a first light conversion unit, and a second light conversion unit. The first light-emitting unit is disposed on the substrate. The second light-emitting unit is disposed on the substrate and adjacent to the first light-emitting unit. The first buffer layer is disposed on the first light-emitting unit. The second buffer layer is disposed on the second light-emitting unit. The first light conversion unit is disposed on the first buffer layer. The second light conversion unit is disposed on the second buffer layer. At least one of the first buffer layer and the second buffer layer has a curved bottom surface.

Claims

1. A display device, comprising:

a substrate;

a first light-emitting unit disposed on the substrate;

a second light-emitting unit disposed on the substrate and adjacent to the first light-emitting unit;

a first buffer layer disposed on the first light-emitting unit;

a second buffer layer disposed on the second light-emitting unit;

a first light conversion unit disposed on the first buffer layer; and

a second light conversion unit disposed on the second buffer layer;

wherein at least one of the first buffer layer and the second buffer layer has a curved bottom surface.

2. The display device as claimed in claim 1, wherein the first buffer layer is connected to the second buffer layer.

3. The display device as claimed in claim 1, wherein a first curvature of the first buffer layer is different from a second curvature of the second buffer layer.

4. The display device as claimed in claim 1, further comprising a sidewall buffer layer connecting the first buffer layer and the second buffer layer, wherein a roughness of the first buffer layer is greater than a roughness of the sidewall buffer layer.

5. The display device as claimed in claim 3, wherein a thickness of the first buffer layer is greater than or equal to a thickness of the sidewall buffer layer.

6. The display device as claimed in claim 1, further comprising a light-shielding layer disposed between the first light conversion unit and the second light conversion unit.

7. The display device as claimed in claim 6, further comprising a growth substrate disposed on the first light-emitting unit, wherein the growth substrate has a plurality of openings, and the light-shielding layer is disposed on sidewalls of the openings.

8. The display device as claimed in claim 1, wherein a material of the first buffer layer comprises resin, silicon nitride, silicon oxide, titanium oxide, aluminum oxide, or a combination thereof.

9. The display device as claimed in claim 1, wherein the first buffer layer further comprises a plurality of first sub-layers and a plurality of second sub-layers, the plurality of first sub-layers and the plurality of second sub-layers are stacked alternately, and a refractive index of the plurality of first sub-layers is greater than a refractive index of the plurality of second sub-layers.

10. The display device as claimed in claim 1, wherein a thickness ratio of the first buffer layer to the first light conversion unit is greater than or equal to 0.2 and less than or equal to 100.

11. The display device as claimed in claim 1, further comprising a neutral layer disposed between the first buffer layer and the first light-emitting unit.

12. The display device as claimed in claim 1, wherein a first width of the first light conversion unit is different from a second width of the second light conversion unit.

13. The display device as claimed in claim 1, wherein a first thickness of the first buffer layer is different from a second thickness of the second buffer layer.

14. The display device as claimed in claim 1, further comprising an electrical contact disposed on the substrate, and the first buffer layer is electrically connected to the electrical contact.

15. The display device as claimed in claim 1, further comprising a growth substrate disposed on the first light-emitting unit, wherein a transmittance of the growth substrate is greater than 50%.

16. The display device as claimed in claim 1, a top surface of the first buffer layer is convex towards the first light conversion unit.

17. The display device as claimed in claim 1, further comprising a filter layer disposed on the first light conversion unit.

18. The display device as claimed in claim 17, further comprising a protection layer disposed on the filter layer.

19. The display device as claimed in claim 17, wherein the filter layer exposes the second light conversion unit.

20. The display device as claimed in claim 1, wherein the first light conversion unit and the second light conversion unit convert light to different ranges of wavelength.