Display device

• US 10,553,654 B2
• Filed: 05/05/2019
• Issued: 02/04/2020
• Est. Priority Date: 02/24/2017
• Status: Active Grant

• Current Assignee: InnoLux Corporation
• Original Assignee: InnoLux Corporation
• Inventors: Lin, Hsiao-Lang, Yueh, Jui-Jen, Lee, Kuan-Feng, Chen, Jia-Yuan
• Primary Examiner(s): Rayan, Mihir K
• Application Number:
  US16/403,609
• Publication Number:
  US 20190259817A1
• Time in Patent Office: 275 Days
• CPC Class Codes: G02B 5/3041 comprising multiple thin layers, e.g. multilayer stacks
• CPC Class Codes: G02F 1/133528 Polarisers
• CPC Class Codes: G02F 1/1336 Illuminating devices
• CPC Class Codes: G02F 1/133614 using photoluminescence, e.g. phosphors illuminated by UV or blue light
• CPC Class Codes: G02F 1/133621 providing coloured light G02F1/133617, G02F1/133533 take precedence
• CPC Class Codes: G02F 2202/36 Micro- or nanomaterials
• CPC Class Codes: H01L 25/0753 the devices being arranged next to each other
• CPC Class Codes: H01L 33/06 within the light emitting region, e.g. quantum confinement structure or tunnel barrier
• CPC Class Codes: H01L 33/504 Elements with two or more wavelength conversion materials
• CPC Class Codes: H10K 59/38 comprising colour filters or colour changing media [CCM]

Abstract

The present disclosure provides a display unit of a display device. The display unit emits an output light under an operation of the highest gray level, the output light having an output spectrum, an intensity integral of the output spectrum from 380 nm to 470 nm defines as a first intensity integral, an intensity integral of the output spectrum from 580 nm to 780 nm defines as a second intensity integral, a ratio of the first intensity integral over the second intensity integral defines as a first ratio, and the first ratio is greater than 0% and less than or equal to 2.5%.

Claims

1. A display device, comprising:

a display unit, comprising;

a light emitting unit;

wherein the display unit emits an output light under an operation of the highest gray level, the output light having an output spectrum, an intensity integral of the output spectrum from 380 nm to 470 nm defines as a first intensity integral, an intensity integral of the output spectrum from 580 nm to 780 nm defines as a second intensity integral, a ratio of the first intensity integral over the second intensity integral defines as a first ratio, and the first ratio is greater than 0% and less than or equal to 2.5%.

2. The display device of claim 1, wherein the output spectrum comprises a first intensity peak and a second intensity peak, the first intensity peak is a maximum peak of the output spectrum from 380 nm to 470 nm, the second intensity peak is a maximum peak of the output spectrum from 580 nm to 780 nm, a ratio of the first intensity peak over the second intensity peak defines as a second ratio, and the second ratio is greater than 0% and less than or equal to 5.5%.

3. The display device of claim 1, further comprising a light converting layer disposed on the light emitting unit, wherein at least a part of the light converting layer overlaps the light emitting unit in a top view direction of the display device.

4. The display device of claim 3, wherein the light converting layer comprises a quantum dot material, a color filter material, or a phosphor material.

5. The display device of claim 3, wherein the light converting layer further comprises a multilayer structure.

6. The display device of claim 3, wherein the light converting layer further comprises at least one pigment material.

7. The display device of claim 3, wherein the light converting layer comprises a first layer and a second layer, the second layer is disposed on the first layer, the first layer comprises a quantum dot material, and the second layer comprises at least one pigment material.

8. The display device of claim 1, wherein the display unit is used as a sub-pixel.

9. The display device of claim 1, wherein the first ratio is less than or equal to 1.7%.

10. The display device of claim 1, wherein the output spectrum comprises a first intensity peak and a second intensity peak, the first intensity peak is a maximum peak of the output spectrum from 380 nm to 470 nm, a wavelength of the first intensity peak ranges from 445 nm to 447 nm, the second intensity peak is a maximum peak of the output spectrum from 580 nm to 780 nm, and a wavelength of the second intensity peak ranges from 633 nm to 639 nm.

11. A display device, comprising:

a backlight unit;

a light modulating layer disposed on the backlight unit; and

a light converting layer disposed on the backlight unit,

wherein a display unit comprises a corresponding portion of the backlight unit, a corresponding portion of the light modulating layer, and a corresponding portion of the light converting layer,

wherein the display unit emits an output light under an operation of the highest gray level, the output light having an output spectrum, an intensity integral of the output spectrum from 380 nm to 470 nm defines as a first intensity integral, an intensity integral of the output spectrum from 580 nm to 780 nm defines as a second intensity integral, a ratio of the first intensity integral over the second intensity integral defines as a first ratio, and the first ratio is greater than 0% and less than or equal to 2.5%.

12. The display device of claim 11, wherein the output spectrum comprises a first intensity peak and a second intensity peak, the first intensity peak is a maximum peak of the output spectrum between 380 nm to 470 nm, the second intensity peak is a maximum peak of the output spectrum between 580 nm to 780 nm, a ratio of the first intensity peak over the second intensity peak defines as a second ratio, and the second ratio is greater than 0% and less than or equal to 5.5%.

13. The display device of claim 11, wherein the light modulating layer is disposed between the backlight unit and the light converting layer.

14. The display device of claim 11, wherein the light converting layer is disposed between the backlight unit and the light modulating layer.

15. The display device of claim 11, wherein the light converting layer comprises a quantum dot material, a color filter material, or a phosphor material.

16. The display device of claim 15, wherein the light converting layer further comprises a multilayer structure.

17. The display device of claim 15, wherein the light converting layer further comprises at least one pigment material.

18. The display device of claim 11, wherein the light converting layer comprises a first layer and a second layer, the second layer is disposed on the first layer, the first layer comprises a quantum dot material, and the second layer comprises at least one pigment material.

19. The display device of claim 11, wherein the first ratio is less than or equal to 1.7%.

20. The display device of claim 11, wherein the output spectrum comprises a first intensity peak and a second intensity peak, the first intensity peak is a maximum peak of the output spectrum from 380 nm to 470 nm, a wavelength of the first intensity peak ranges from 445 nm to 447 nm, the second intensity peak is a maximum peak of the output spectrum from 580 nm to 780 nm, and a wavelength of the second intensity peak ranges from 633 nm to 639 nm.