Display device

• US 10,481,431 B2
• Filed: 05/27/2019
• Issued: 11/19/2019
• Est. Priority Date: 08/01/2017
• Status: Active Grant

• Current Assignee: InnoLux Corporation
• Original Assignee: InnoLux Corporation
• Inventors: Lin, Hsiao-Lang, Tsai, Tsung-Han
• Primary Examiner(s): Lee, Jr., Kenneth B
• Application Number:
  US16/423,142
• Publication Number:
  US 20190294003A1
• Time in Patent Office: 176 Days
• Field of Search: None
• CPC Class Codes: G02F 1/133512 Light shielding layers, e.g. black matrix G02F1/136209 takes precedence
• CPC Class Codes: G02F 1/133514 Colour filters
• CPC Class Codes: G02F 1/133553 Reflecting elements associated to illuminating devices G02F1/133605
• CPC Class Codes: G02F 1/133603 with LEDs
• CPC Class Codes: G02F 1/133609 including means for improving the color mixing, e.g. white
• CPC Class Codes: G02F 1/133614 using photoluminescence, e.g. phosphors illuminated by UV or blue light
• CPC Class Codes: G02F 1/133617 Illumination with ultraviolet light; Luminescent elements or materials associated to the cell
• 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: G06F 21/32 using biometric data, e.g. fingerprints, iris scans or voiceprints
• CPC Class Codes: G06F 2221/2133 Verifying human interaction, e.g., Captcha
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/0481 based on specific properties of the displayed interaction object or a metaphor-based environment, e.g. interaction with desktop elements like windows or icons, or assisted by a cursor's changing behaviour or appearance
• CPC Class Codes: H01L 25/0753 the devices being arranged next to each other
• CPC Class Codes: H01L 33/44 characterised by the coatings, e.g. passivation layer or anti-reflective coating
• CPC Class Codes: H10K 59/352 the areas of the RGB subpixels being different
• CPC Class Codes: H10K 59/38 comprising colour filters or colour changing media [CCM]
• CPC Class Codes: H10K 59/50 OLEDs integrated with light modulating elements, e.g. with electrochromic elements, photochromic elements or liquid crystal elements

Abstract

The disclosure provides a display device, including a display unit emitting an output light having an output spectrum corresponding to a highest gray level of the display device. A maximum peak of the output spectrum from 543 nm to 780 nm is defined as an intensity peak corresponding to a wavelength, an intensity integral of the output spectrum from the first wavelength to 780 nm is defined as a first intensity integral, and an intensity integral of the output spectrum from 543 nm to the first wavelength is defined as a second intensity integral. A ratio of an intensity integral of the output spectrum from 380 nm to 543 nm to a sum of the first intensity integral and the second intensity integral is greater than or equal to 0.05% and less than or equal to 4.00%.

Claims

1. A display device, comprising:

a display unit emitting an output light having an output spectrum corresponding to a highest gray level of the display device,

wherein a maximum peak of the output spectrum from 543 nm to 780 nm is defined as a first intensity peak corresponding to a first wavelength, an intensity integral of the output spectrum from the first wavelength to 780 nm is defined as a first intensity integral, an intensity integral of the output spectrum from 543 nm to the first wavelength is defined as a second intensity integral, an intensity integral of the output spectrum from 380 nm to 543 nm is defined as a third intensity integral, a sum of the first intensity integral and the second intensity integral is defined as a first sum, a ratio of the third intensity integral to the first sum is defined as a first ratio, and the first ratio is greater than or equal to 0.05% and less than or equal to 4.00%.

2. The display device according to claim 1, wherein a difference of subtracting the second intensity integral from the first intensity integral is defined as a first difference, a ratio of the third intensity integral to the first difference is defined as a second ratio, and the second ratio is greater than or equal to 0.5% and less than or equal to 38.0%.

3. The display device according to claim 1, wherein an intensity integral of the output spectrum from 380 nm to 496 nm is defined as a fourth intensity integral, an intensity integral of the output spectrum from 496 nm to 543 nm is defined as a fifth intensity integral, a ratio of the fifth intensity integral to the fourth intensity integral is defined as a third ratio, and the third ratio is greater than or equal to 1.0% and less than or equal to 77.0%.

4. The display device according to claim 1, wherein a maximum peak of the output spectrum from 380 nm to 496 nm is defined as a second intensity peak, a maximum peak of the output spectrum from 496 nm to 543 nm is defined as a third intensity peak, and the second intensity peak is greater than the third intensity peak.

5. The display device according to claim 1, wherein a second wavelength and a third wavelength respectively corresponds to an intensity of a half of the first intensity peak, the second wavelength is less than the third wavelength, an intensity integral of the output spectrum from 543 nm to the second wavelength is defined as a sixth intensity integral, an intensity integral of the output spectrum from the third wavelength to 780 nm is defined as a seventh intensity integral, a ratio of the sixth intensity integral to the seventh intensity integral is defined as a fourth ratio, and the fourth ratio is greater than or equal to 37.0% and less than or equal to 99.0%.

6. The display device according to claim 1, wherein a fourth wavelength and a fifth wavelength respectively corresponds to an intensity of a quarter of the first intensity peak, the fourth wavelength is less than the fifth wavelength, a ratio of an intensity integral of the output spectrum from 543 nm to the fourth wavelength to an intensity integral of the output spectrum from the fifth wavelength to 780 nm is greater than or equal to 37.0% and less than or equal to 82.0%.

7. The display device according to claim 1, wherein a sixth wavelength and a seventh wavelength respectively corresponds to an intensity of an eighth of the first intensity peak, the sixth wavelength is less than the seventh wavelength, a ratio of an intensity integral of the output spectrum from 543 nm to the sixth wavelength to an intensity integral of the output spectrum from the seventh wavelength to 780 nm is greater than or equal to 26.0% and less than or equal to 90.0%.

8. The display device according to claim 1, wherein a maximum peak of the output spectrum from 380 nm to 543 nm is defined as a fourth intensity peak, a ratio of the fourth intensity peak to the first intensity peak is defined as a fifth ratio, and the fifth ratio is greater than or equal to 0.1% and less than or equal to 1.5%.

9. The display device according to claim 1, wherein the first wavelength is greater than or equal to 604 nm and less than or equal to 644 nm.

10. The display device according to claim 1, further comprising:

a first substrate and a second substrate disposed opposite to each other;

a light modulating layer disposed between the first substrate and the second substrate;

a backlight unit, wherein the first substrate is disposed between the light modulating layer and the backlight unit; and

a light converting layer, wherein the light converting layer is disposed between the backlight unit and the first substrate, the light converting layer is disposed between the light modulating layer and the second substrate, or the first substrate is disposed between the light modulating layer and the light converting layer.

11. The display device according to claim 10, wherein the converting layer comprises a first color adjusting material and a second color adjusting material, the third intensity integral of the output spectrum of the output light is corresponding to the first color adjusting material, and the first intensity integral being greater than the second intensity integral is corresponding to the second color adjusting material.

12. The display device according to claim 10, further comprising a display panel and another light converting layer, wherein the display panel comprises the light converting layer, and the another light converting layer is disposed between the backlight unit and the display panel.

13. The display device according to claim 1, further comprising:

a substrate; and

a plurality of light sources disposed on the substrate.

14. The display device according to claim 13, wherein one of the plurality of light sources in the display unit comprises a first color adjusting material and a second color adjusting material, the third intensity integral of the output spectrum of the output light is corresponding to the first color adjusting material, and a difference between the first intensity integral and the second intensity integral of the output spectrum of the output light is corresponding to the second color adjusting material.

15. The display device according to claim 13, further comprising a light converting layer, wherein the light converting layer is disposed on the plurality of light sources, the third intensity integral of the output spectrum of the output light is corresponding to the light converting layer, and a difference between the first intensity integral and the second intensity integral of the output spectrum of the output light is corresponding to the light converting layer.

16. The display device according to claim 15, wherein the plurality of light sources generate light with same color.

17. The display device according to claim 1, wherein the first intensity integral is greater than the second intensity integral.

18. The display device according to claim 1, wherein the first sum is greater than the third intensity integral.

19. The display device according to claim 1, wherein the output spectrum from 380 nm to 543 nm includes at least two intensity peaks.

20. The display device according to claim 1, wherein the display unit is a red sub-pixel.