PATTERNED COLOR CONVERSION FILM AND DISPLAY DEVICE USING THE SAME

• US 20140192294A1
• Filed: 12/09/2013
• Published: 07/10/2014
• Est. Priority Date: 01/07/2013
• Status: Active Grant

• Current Assignee: InnoLux Corporation
• Original Assignee: InnoLux Corporation
• Inventors: CHEN, Chih-Jung, WENG, Ruey-Jer, LIEN, Jiun-Yi
• Granted Patent: US 9,267,664 B2
• Time in Patent Office: Days
• US Class Current: 349/69
• CPC Class Codes: F21V 9/08 for producing coloured light, e.g. monochromatic; for reducing intensity of light with provision for controlling the colour F21V9/40
• CPC Class Codes: G02F 1/133504 Diffusing, scattering, diffracting elements associated to illuminating devices G02F1/133606
• CPC Class Codes: G02F 1/133514 Colour filters
• 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 2202/108 quantum wells
• CPC Class Codes: H10K 59/35 comprising red-green-blue [RGB] subpixels

Abstract

A patterned color conversion film and a display device using the same are disclosed. The patterned color conversion film of the present invention comprises: a separator with plural openings; and plural pixel units disposed in the openings respectively, each pixel unit respectively comprising: a medium and scattering particles dispersed therein. Herein, at least one of the plural pixel units comprises quantum dots having the scattering particles sized of between 0.05 and 1 μm when a volume concentration of the quantum dots is in a range more than or equal to 5% and less than or equal to 80%, or having the scattering particles sized of between 0.2 and 2 μm when the volume concentration of the quantum dots is in a range less than 5% and more than or equal to 0%.

Claims

1. A patterned color conversion film, comprising:

a separator with plural openings; and

plural pixel units disposed in the openings respectively, each pixel unit respectively comprising a medium and scattering particles dispersed therein,

wherein at least one of the plural pixel units comprises quantum dots having the scattering particles sized of between 0.05 and 1 μ

m when a volume concentration of the quantum dots is in a range more than or equal to 5% and less than or equal to 80%, or having the scattering particles sized of between 0.2 and 2 μ

m when the volume concentration of the quantum dots is in a range less than 5% and more than or equal to 0%.

2. The patterned color conversion film as claimed in claim 1, wherein a volume concentration of the scattering particles is 0.5-20% respectively.

3. The patterned color conversion film as claimed in claim 1, wherein a refractive index of the medium is in a range from 1.4 to 1.7 respectively.

4. The patterned color conversion film as claimed in claim 1, wherein a refractive index of the scattering particles is in a range from 1.0 to 3.0, and the refractive index of the scattering particles is different from that of the medium.

5. The patterned color conversion film as claimed in claim 4, wherein each scattering particle is made of an inorganic material, a transparent polymer, glass, hole, or a combination thereof respectively.

6. The patterned color conversion film as claimed in claim 5, wherein each scattering particle is made of ZnO, TiO₂, polystyrene, polycarbonate, styrene-acrylonitrile, SiO₂, borosilicate, air, or a combination thereof respectively.

7. The patterned color conversion film as claimed in claim 1, wherein a thickness of the patterned color conversion film is 10-300 μ

m.

8. The patterned color conversion film as claimed in claim 1, wherein the separator is made of a resin, a black matrix, a white matrix, a metal, a dried film, or a combination thereof.

9. The patterned color conversion film as claimed in claim 1, wherein at least one of the plural pixel units comprise a red pixel unit, a green pixel unit, and a blue pixel unit, and each pixel unit respectively comprises:

the medium, the scattering particles dispersed therein, and the quantum dots dispersed therein.

10. The patterned color conversion film as claimed in claim 1, wherein at least one of the plural pixel units comprises a red pixel unit, a green pixel unit, and a transparent pixel unit, the red pixel unit and the green pixel unit respectively comprises:

the medium, the scattering particles dispersed therein, and the quantum dots dispersed therein, and the transparent pixel unit comprises;

the medium, and the scattering particles dispersed therein.

11. A display device, comprising:

a light source; and

a patterned color conversion film disposed on an emitting surface of the light source and comprising;

a separator with plural openings; and

plural pixel units disposed in the openings respectively, each pixel unit respectively comprising;

a medium and scattering particles dispersed therein,

wherein at least one of the plural pixel units comprises quantum dots having the scattering particles sized of between 0.05 and 1 μ

m when a volume concentration of the quantum dots is in a range more than or equal to 5% and less than or equal to 80%, or having the scattering particles sized of between 0.2 and 2 μ

m when the volume concentration of the quantum dots is in a range less than 5% and more than or equal to 0%.

12. The display device as claimed in claim 11, further comprising:

a first polarizer disposed on the light source;

a first substrate disposed on the first polarizer, wherein a first electrode is disposed on the first substrate;

a second substrate with a second electrode disposed on a first side thereof;

a liquid crystal layer disposed between the first substrate and the second substrate; and

a second polarizer disposed on a second side of the second substrate, or between the second substrate and the second electrode;

wherein the patterned color conversion film is disposed on a first side of the first polarizer opposite to a second side thereof facing to the second polarizer, or a first side of the second polarizer opposite to a second side thereof facing to the first polarizer.

13. The display device as claimed in claim 12, wherein the second polarizer is disposed on the second side of the second substrate, and the patterned color conversion film is disposed on the second polarizer or between the light source and the first polarizer.

14. The display device as claimed in claim 12, wherein the second polarizer is disposed between the second substrate and the second electrode, and the patterned color conversion film is disposed between the second substrate and the second polarizer.

15. The display device as claimed in claim 11, further comprising:

a first electrode disposed under the light source; and

a second electrode disposed on the light source,

wherein the light source is an organic layer and disposed between the first electrode and the second electrode, and the patterned color conversion film is disposed on the second electrode.

16. The display device as claimed in claim 11, wherein the light source is a blue-light source, at least one of the plural pixel units comprises a red pixel unit, a green pixel unit, and a transparent pixel unit, the red pixel unit and the green pixel unit respectively comprises:

the medium, the scattering particles dispersed therein, and the quantum dots dispersed therein, and the transparent pixel unit comprises;

the medium, and the scattering particles dispersed therein.

17. The display device as claimed in claim 11, wherein the light source is an UV-light source, at least one of the plural pixel units comprises a red pixel unit, a green pixel unit, and a blue pixel unit, and the red pixel unit, the green pixel unit, and the blue pixel unit respectively comprises:

the medium, the scattering particles dispersed therein, and the quantum dots dispersed therein.

18. The display device as claimed in claim 11, wherein a volume concentration of the scattering particles is 0.5-20% respectively.

19. The display device as claimed in claim 11, wherein a refractive index of the scattering particles is in a range from 1.0 to 3.0 respectively, and the refractive index of the scattering particles is different from that of the medium.

20. The display device as claimed in claim 11, wherein each scattering particle is made of an inorganic particle, a transparent polymer, glass, hole, or a combination thereof respectively.