DISPLAY DEVICE WITH COLOR CONVERSION LAYER FOR FULL-COLOR DISPLAY

• US 20150185381A1
• Filed: 12/24/2014
• Published: 07/02/2015
• Est. Priority Date: 12/26/2013
• Status: Active Grant

• Current Assignee: Hon Hai Precision Industry Co., Ltd.
• Original Assignee: Ye Xin Technology Consulting Co Ltd
• Inventors: WU, I-Wei, LIN, Yung-Fu, LIN, Chang-Ting, TSENG, Shih-Pin, LIN, Pen-Chu
• Granted Patent: US 9,720,149 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: B82Y 20/00 Nanooptics, e.g. quantum optics or photonic crystals
• CPC Class Codes: G02B 5/201 in the form of arrays
• CPC Class Codes: G02F 1/133514 Colour filters
• CPC Class Codes: G02F 1/133617 Illumination with ultraviolet light; Luminescent elements or materials associated to the cell
• CPC Class Codes: G02F 2202/36 Micro- or nanomaterials
• CPC Class Codes: H10K 50/865 comprising light absorbing layers, e.g. light-blocking layers
• CPC Class Codes: H10K 59/38 comprising colour filters or colour changing media [CCM]
• CPC Class Codes: H10K 59/8792 comprising light absorbing layers, e.g. black layers
• CPC Class Codes: Y10S 977/774 Exhibiting three-dimensional carrier confinement, e.g. quantum dots

Abstract

A display device with a color conversion layer providing predetermined colors for full-color display. The color conversion layer includes a plurality of color conversion units. Each color conversion unit includes a quantum dot film. The color conversion unit is configured to receive light beams and converts the light beams to primary colors to emit. Each color conversion unit defines a plurality of areas, and each primary color corresponds to one of the areas of the color conversion unit.

Claims

1. A color conversion layer, comprising

a plurality of color conversion units, wherein each of the plurality of color conversion units comprises a quantum dot film and divides into a plurality of sub-areas, the plurality of color conversion units receive a monochromatic light and convert the monochromatic light to at least one of three-primary colors to emit, and each of the plurality of sub-areas corresponds to the at least one of three-primary colors.

2. The color conversion layer of claim 1, further comprising a shielding layer dividing the plurality of color conversion units into the plurality of sub-areas.

3. The color conversion layer of claim 2, wherein the monochromatic light is blue light, the plurality of color conversion units further comprises a color filter layer overlapping the quantum dot film, the quantum dot film receives the blue light and converts the blue light to white light to emit, and the color filter layer filters the white light to produce one of the three-primary colors.

4. The color conversion layer of claim 3, wherein the quantum dot film comprises a plurality of red quantum dots with red emission spectrum and a plurality of green quantum dots with green emission spectrum, the quantum dot film converts part of the blue light to green light and red light, and the green light and the red light mix remnants of the blue light to produce white light.

5. The color conversion layer of claim 4, wherein the color filter layer comprises a coloration layer and a first black matrix, the coloration layer comprises a red coloration unit, a green coloration unit and a blue coloration unit, and the first black matrix is configured to separate each of the coloration units.

6. The color conversion layer of claim 5, wherein the shielding layer of the color conversion layer is formed by the first black matrix.

7. The color conversion layer of claim 5, wherein the quantum dot film further comprises a second black matrix corresponding to the first black matrix, the second black matrix divides the quantum dot film into the plurality of sub-regions, and the first black matrix and the second black matrix form the shielding layer of the plurality of color conversion units.

8. The color conversion layer of claim 2, wherein the monochromatic light is blue light, the quantum dot film comprises a second black matrix forming a shielding layer of the plurality of color conversion units, the second black matrix divides the quantum dot film into a first sub-region, a second sub-region and a third sub-region, the first sub-region of the quantum dot film comprises a plurality of red quantum dots with red emission spectrum, the second sub-region of the quantum dot film comprises a plurality of green quantum dots with green emission spectrum, the third sub-region of the quantum dot film comprises a transparent matter, the first sub-region of the quantum dot film receives the blue light and converts the blue light to red of primary color light to emit, the second sub-region of the quantum dot film receives the blue light and converts the blue light to green of primary color light to emit, and the blue light penetrates the third sub-region of the quantum dot film to emit.

9. The color conversion layer of claim 8, wherein the plurality of color conversion units further comprises a color filter layer overlapping the quantum dot film, the color filter layer comprises a coloration layer and a first black matrix, the coloration layer comprises a red coloration unit corresponding to the first sub-region of the quantum dot film, a green coloration unit corresponding to the second sub-region of the quantum dot film and a transparent coloration unit corresponding to the third sub-region of the quantum dot film, and the first black matrix is configured to separate the red coloration unit, the green coloration unit and the transparent coloration unit.

10. A display device, comprising:

a plurality of pixels, wherein each of the plurality of the pixels comprises a first sub-pixel, a second sub-pixel and a third sub-pixel emitting different color light respectively;

a substrate;

a plurality of scanning lines parallelly disposed on the substrate;

a plurality of data lines parallelly disposed on the substrate and insulately crossing the plurality of scanning lines to define the first sub-pixel, the second sub-pixel and the third sub-pixel respectively;

a plurality of first electrodes, wherein each of the plurality of first electrodes corresponding to the first sub-pixel, the second sub-pixel and the third sub-pixel respectively;

an organic light-emitting layer;

a second electrode, wherein each of the plurality of first electrodes, the organic light-emitting layer and the second electrode define an OLED unit; and

a color conversion layer comprising a plurality of color conversion units, wherein each of the plurality of color conversion units comprises a quantum dot film and corresponds to one of the plurality of pixels, the plurality of color conversion units receives a monochromatic light and converts the monochromatic light to at least one of three-primary colors to emit,

wherein each of the plurality of color conversion units comprises a plurality of sub-areas, each of the plurality of sub-areas corresponds to the at least one of three-primary colors, and each of the plurality of sub-areas corresponds to the first sub-pixel, the second sub-pixel and the third sub-pixel respectively.

11. The display device of claim 10, wherein the color conversion layer is disposed on the second electrode away from the plurality of first electrodes.

12. The display device of claim 10, wherein the color conversion layer is disposed between the plurality of first electrodes and the second electrode.

13. The display device of claim 12, wherein the OLED unit comprises at least one of a hole injection layer and a hole transporting layer disposed between the plurality of first electrodes and the organic light-emitting layer.

14. The display device of claim 12, wherein the OLED unit further comprises at least one of an electron injection layer and an electron transporting layer disposed between the second electrode and the organic light-emitting layer, the color conversion layer disposed between any two layers of the plurality of first electrodes, a hole injection layer, a hole transporting layer, the organic light-emitting layer, the electron transporting layer, the electron injection layer and the second electrode.

15. A display device, comprising:

a first substrate;

a second substrate opposite to the first substrate; and

a color conversion layer disposed between the first substrate and the second substrate,

wherein the color conversion layer comprises a plurality of color conversion units, each of the plurality of color conversion units comprises a quantum dot film and divides into a plurality of sub-areas, the plurality of color conversion units receive a monochromatic light and convert the monochromatic light to at least one of three-primary colors to emit, and each of the plurality of sub-areas corresponds to the at least one of three-primary colors.

16. The display device of claim 15, wherein the quantum dot film comprises a plurality of red quantum dots with red emission spectrum and a plurality of green quantum dots with green emission spectrum, the quantum dot film converts parts of blue light to green light and red light, and the green light and the red light mix remnants of the blue light to produce white light.

17. The display device of claim 15, further comprising a liquid crystal layer sandwiched between the first substrate and the second substrate, the color conversion layer disposed between the second substrate and the liquid crystal layer.

18. The display device of claim 15, further comprising a shielding layer dividing the plurality of color conversion units into the plurality of sub-areas.

19. The display device of claim 15, wherein the monochromatic light is blue light, the plurality of color conversion units further comprises a color filter layer overlapping the quantum dot film, the quantum dot film receives the blue light and converts the blue light to white light to emit, and the color filter layer filters the white light to produce one of the three-primary colors.

20. The display device of claim 19, wherein the color filter layer comprises a coloration layer and a first black matrix, the coloration layer comprises a red coloration unit, a green coloration unit and a blue coloration unit, and the first black matrix is configured to separate each of the coloration units.