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CN-115877487-B - Quantum dot composite film

CN115877487BCN 115877487 BCN115877487 BCN 115877487BCN-115877487-B

Abstract

The invention provides a quantum dot composite film, which comprises a plurality of quantum dots dispersed in an optical film, wherein the quantum dots are resistant to water and oxygen, and a plurality of prisms are arranged on a quantum dot layer.

Inventors

  • Miu Jiaye
  • Ruan Youmei
  • JIANG JIARONG
  • LIN GEWEI
  • LV YINGYI
  • CHEN HUIYONG
  • XIN LONGBIN
  • WU XINJIE

Assignees

  • 友辉光电股份有限公司

Dates

Publication Date
20260508
Application Date
20220808
Priority Date
20210809

Claims (15)

  1. 1. A quantum dot composite film, comprising: A quantum dot prism film comprising a quantum dot layer and a first plurality of prisms disposed on the quantum dot layer; A first optical prism film including a second plurality of prisms on a first side of the first optical prism film and a first adhesive layer disposed on a second side of the first optical prism film, wherein the first side of the first optical prism film and the second side of the first optical prism film are opposite sides of the first optical prism film, and A second optical prism film comprising a third plurality of prisms on a first side of the second optical prism film and a second adhesive layer disposed on a second side of the second optical prism film, wherein the first side of the second optical prism film and the second side of the second optical prism film are opposite sides of the second optical prism film, wherein the tops of the first plurality of prisms are embedded in the first adhesive layer, the tops of the second plurality of prisms are embedded in the second adhesive layer, wherein the total thickness of the quantum dot prism film is 70-380um, wherein a gap between two adjacent prisms in the quantum dot prism film is 20-60um, a gap between two adjacent prisms in the first optical prism film is 12-50um, and a gap between two adjacent prisms in the second optical prism film is 29-58 um.
  2. 2. The quantum dot composite film of claim 1, wherein the quantum dot prism film comprises a first substrate and a second substrate, wherein the quantum dot layer is disposed between the first substrate and the second substrate, and wherein the first plurality of prisms are disposed on the first substrate.
  3. 3. The quantum dot composite film of claim 1, wherein the quantum dot layer has a thickness of 60-350um.
  4. 4. The quantum dot composite film of claim 1, wherein the quantum dot prism film has a thickness of 70-380um.
  5. 5. The quantum dot composite film of claim 1, wherein a third adhesive layer is disposed on the quantum dot layer, and the first plurality of prisms are attached to the third adhesive layer.
  6. 6. The quantum dot composite film according to claim 1, wherein the first optical prism film and the second optical prism film are each composed of a PET substrate having a thickness of 25 to 188um.
  7. 7. The quantum dot composite film of claim 1, wherein the first optical prism film and the second optical prism film form an optical composite prism film, wherein the total thickness of the optical composite prism film is 70um to 430um.
  8. 8. The quantum dot composite film of claim 1, wherein the quantum dot layer comprises a plurality of quantum dots and a plurality of diffusion particles.
  9. 9. The quantum dot composite film of claim 8, wherein the plurality of quantum dots have a water-resistant, oxygen-resistant capability.
  10. 10. A quantum dot composite film, comprising: The quantum dot prism film comprises a quantum dot layer, a first substrate, a second substrate and a first plurality of prisms, wherein the quantum dot layer is arranged between the first substrate and the second substrate, and the first plurality of prisms are arranged on the first substrate; A first optical prism film including a second plurality of prisms on a first side of the first optical prism film and a first adhesive layer disposed on a second side of the first optical prism film, wherein the first side of the first optical prism film and the second side of the first optical prism film are opposite sides of the first optical prism film, and A second optical prism film comprising a third plurality of prisms on a first side of the second optical prism film and a second adhesive layer disposed on a second side of the second optical prism film, wherein the first side of the second optical prism film and the second side of the second optical prism film are opposite sides of the second optical prism film, wherein the tops of the first plurality of prisms are embedded in the first adhesive layer, the tops of the second plurality of prisms are embedded in the second adhesive layer, wherein the total thickness of the quantum dot prism film is 70-380um, wherein a gap between two adjacent prisms in the quantum dot prism film is 20-60um, a gap between two adjacent prisms in the first optical prism film is 12-50um, and a gap between two adjacent prisms in the second optical prism film is 29-58 um.
  11. 11. The quantum dot composite film of claim 10, wherein the quantum dot layer has a thickness of 60-350um.
  12. 12. The quantum dot composite film of claim 10, wherein the quantum dot prism film has a thickness of 70-380um.
  13. 13. The quantum dot composite film of claim 10, wherein a third adhesive layer is disposed on the quantum dot layer, and the first plurality of prisms are attached to the third adhesive layer.
  14. 14. The quantum dot composite film of claim 10, wherein the first optical prism film and the second optical prism film are each composed of a PET substrate having a thickness of 25-188um.
  15. 15. The quantum dot composite film of claim 10, wherein the first optical prism film and the second optical prism film form an optical composite prism film, wherein the total thickness of the optical composite prism film is 70um to 430um.

Description

Quantum dot composite film Technical Field The present invention relates to an optical film, and more particularly, to a quantum dot composite film. Background The quantum dot is a small spherical semiconductor particle with nanometer size, and has the characteristics that when the quantum dot is excited by light or electricity, the quantum dot emits a colored spectrum, the Color of the quantum dot is determined by the material composition and the size of the quantum dot, and the quantum dot can change the Color of light emitted by a light source by virtue of the characteristic, so that the quantum dot can be widely applied to a display, and can improve the Color gamut of the display, enhance the Color and the brightness of the LCD, and enable the NTSC Color gamut of the LCD display to reach 110%. Common quantum dot materials are composed of IV, II-VI, IV-VI or III-V elements, such as silicon quantum dots, germanium quantum dots, cadmium sulfide quantum dots, cadmium selenide quantum dots, cadmium telluride quantum dots, zinc selenide quantum dots, lead sulfide quantum dots, lead selenide quantum dots, indium phosphide quantum dots, indium arsenide quantum dots, and the like. The quantum dot materials currently widely used are mainly cadmium selenide (CdSe) series and indium phosphide (InP) series, the former is mainly adopted by QD Vision, the latter is mainly adopted by Nanoco, and Nanosys adopts an indium phosphide and cadmium mixed quantum dot scheme. The two quantum dots have advantages and disadvantages, cadmium selenide is superior to cadmium selenide in high luminous efficiency and wider color gamut expressive force, but contains cadmium heavy metal, and indium phosphide is not limited by European Union ROHS standard because of no cadmium. The so-called "quantum dot televisions" on the market are all liquid crystal televisions with a quantum dot layer, and are mainly divided into a tube type quantum dot backlight and a film type quantum dot backlight, the former is mainly produced by QD Vision in the united states, called Color IQ optical element, and the latter is mainly produced by Nanosys company in the united states, called QDEF film. As the tricolor light is directly converted from blue light, the quantum dot backlight source has tricolor with higher purity compared with the common LED backlight source, and more real and more balanced color expression can be created by adjusting the size distribution of the quantum dot material. The traditional quantum dot optical film product is a quantum dot optical film with a sandwich structure, wherein the sandwich structure is provided with a gas barrier film (gas barrier film) on the upper and lower sides, and a quantum dot main structure layer is generally a cadmium-containing quantum dot optical film, or a low-cadmium quantum dot optical film or a cadmium-free quantum dot optical film, the thickness of the quantum dot optical film is generally 50-300 um different, and the quantum dot optical film and an incremental film are stacked and then assembled into a backlight film group at present in the application of an LCD. Therefore, the thickness of the whole film and the assembly process time are increased in the backlight film group, so that the thickness of the whole LCD display and the manufacturing process and material cost are increased. The present invention therefore proposes a new solution to overcome the above drawbacks. Disclosure of Invention In one embodiment, the invention provides a quantum dot composite film comprising a quantum dot prism film comprising a quantum dot layer and a first plurality of prisms disposed on the quantum dot layer, a first optical prism film comprising a second plurality of prisms disposed on a first side of the first optical prism film and a first adhesive layer disposed on a second side of the first optical prism film, wherein the first side of the first optical prism film and the second side of the first optical prism film are opposite sides of the first optical prism film, and a second optical prism film comprising a third plurality of prisms disposed on a first side of the second optical prism film and a second adhesive layer disposed on a second side of the second optical prism film, wherein the first side of the second optical prism film and the second side of the second optical prism film are opposite sides of the second optical prism film, wherein the top of the first plurality of prisms is embedded in the first adhesive layer and the top of the second plurality of prisms is embedded in the second adhesive layer. In an embodiment, the quantum dot prism film includes a first substrate and a second substrate, wherein the quantum dot layer is disposed between the first substrate and the second substrate, and the first plurality of prisms are disposed on the first substrate. In one embodiment, the gap between two adjacent prisms in the quantum dot prism film is 20-60um, the gap between two adjacent prisms of th