QUANTUM DOT POLARIZATION PLATE

Abstract

The present invention provides a quantum dot polarization plate, which includes, arranged in sequence, a release film (16), an adhesive layer (15), a retardation layer (14), a polarization layer (13), a protection layer (12), and a surface protection film (11). The retardation layer (14) is formed a mixed material including quantum dots and disk-like liquid crystal by means of a film formation process and shows dual effects of light emission and viewing angle compensation thereby reducing the operations required for manufacturing the quantum dot polarization plate and allowing the quantum dot polarization plate to maintain light polarity, while effectively increasing color gamut coverage of a display and achieving wide view angle of the display, and the manufacturing operation thereof is simple.

Claims

1. A quantum dot polarization plate, comprising, arranged in sequence, a release film, an adhesive layer, a retardation layer, a polarization layer, a protection layer, and a surface protection film; wherein the retardation layer is formed a mixed material comprising quantum dots and disk-like liquid crystal by means of a film formation process, wherein the quantum dots are in the form of bars.

2. The quantum dot polarization plate as claimed in claim 1, wherein the quantum dots contained in the retardation layer comprise one of quantum dot of II-VI groups, quantum dots of III-V groups, and carbon quantum dot or a combination of multiple ones thereof.

3. The quantum dot polarization plate as claimed in claim 1, wherein the quantum dots are subjected to modification through surface grafting or surface coating.

4. The quantum dot polarization plate as claimed in claim 1, wherein the quantum dots are oil soluble or water soluble.

5. The quantum dot polarization plate as claimed in claim 1, wherein the quantum dots comprise nanometer particles having a size in the range of 0-20 nm.

6. The quantum dot polarization plate as claimed in claim 1, wherein the film formation process of the retardation layer comprises one of spray coating, spin coating, printing, and slot die coating.

7. The quantum dot polarization plate as claimed in claim 1, wherein the quantum dot polarization plate is used as an upper polarizer or a lower polarizer of a liquid crystal display panel.

8. The quantum dot polarization plate as claimed in claim 1, wherein the polarization layer comprises an iodine-series polarization film or a dye-series polarization film; and the polarization layer is formed of a material comprising polyvinyl alcohol.

9. The quantum dot polarization plate as claimed in claim 2, wherein the protection layer is formed of a material comprising triacetyl cellulose; and the adhesive layer is formed of a material of pressure-sensitive adhesive.

10. The quantum dot polarization plate as claimed in claim 1, wherein, in use of the quantum dot polarization plate, the release film is peeled off and the quantum dot polarization plate is attached by means of the adhesive layer to substrate to be attached to.

11. A quantum dot polarization plate, comprising, arranged in sequence, a release film, an adhesive layer, a retardation layer, a polarization layer, a protection layer, and a surface protection film; wherein the retardation layer is formed a mixed material comprising quantum dots and disk-like liquid crystal by means of a film formation process, wherein the quantum dots are in the form of bars; wherein the quantum dots contained in the retardation layer comprise one of quantum dot of II-VI groups, quantum dots of III-V groups, and carbon quantum dot or a combination of multiple ones thereof; wherein the quantum dots are subjected to modification through surface grafting or surface coating; wherein the quantum dots are oil soluble or water soluble; and wherein the quantum dots comprise nanometer particles having a size in the range of 0-20 nm.

12. The quantum dot polarization plate as claimed in claim 11, wherein the film formation process of the retardation layer comprises one of spray coating, spin coating, printing, and slot die coating.

13. The quantum dot polarization plate as claimed in claim 11, wherein the quantum dot polarization plate is used as an upper polarizer or a lower polarizer of a liquid crystal display panel.

14. The quantum dot polarization plate as claimed in claim 11, wherein the polarization layer comprises an iodine-series polarization film or a dye-series polarization film; and the polarization layer is formed of a material comprising polyvinyl alcohol.

15. The quantum dot polarization plate as claimed in claim 11, wherein the protection layer is formed of a material comprising triacetyl cellulose; and the adhesive layer is formed of a material of pressure-sensitive adhesive.

16. The quantum dot polarization plate as claimed in claim 11, wherein, in use of the quantum dot polarization plate, the release film is peeled off and the quantum dot polarization plate is attached by means of the adhesive layer to substrate to be attached to.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The technical solution, as well as other beneficial advantages, of the present invention will be apparent from the following detailed description of embodiments of the present invention, with reference to the attached drawing. In the drawing:

[0029] FIG. 1 is a cross-sectional view showing the structure of a conventional polarization plate;

[0030] FIG. 2 is a cross-sectional view illustrating the structure of a quantum dot polarization plate according to the present invention; and

[0031] FIG. 3 is a schematic view illustrating the quantum dot polarization plate according to the present invention bonded to a substrate.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0032] To further expound the technical solution adopted in the present invention and the advantages thereof, a detailed description is given to a preferred embodiment of the present invention and the attached drawings.

[0033] Referring to FIGS. 2-3, the present invention provides a quantum dot polarization plate, which comprises, arranged in sequence from top to bottom, a release film 16, an adhesive layer 15, a retardation layer 14, a polarization layer 13, a protection layer 12, and a surface protection film 11.

[0034] The retardation layer 14 is formed a mixed material comprising quantum dots and disk-like liquid crystal by means of a film formation process, wherein the quantum dots are in the form of bars.

[0035] Specifically, in the manufacture of the retardation layer 14, the quantum dots, the disk-like liquid crystal, and a treating agent are mixed in a solvent to obtain a mixed material. To achieve a bettered effect of mixture of the quantum dots and the disk-like liquid crystal, addition or reduction of the treating agent or the solvent, or change of the ratios of the components may be taken. And, finally, the film formation process is conducted to form the retardation layer 14.

[0036] Specifically, the quantum dots contained in the retardation layer 14 comprise one of quantum dot of II-VI groups (such as CdS, CdSe, CdTe, and ZnSe), quantum dot of III-V groups (such as InP and InAs), and carbon quantum dot or a combination of multiple ones thereof.

[0037] Preferably, the quantum dots of the retardation layer 14 are a combination of multiple types of quantum dot to provide a better effect of increasing color gamut and improved mixture.

[0038] Specifically, the quantum dots can be quantum dots that are subjected to modification through surface grafting or surface coating so as to have them provide a more uniform and more stable mixing effect in the solvent.

[0039] Specifically, the quantum dots are oil soluble or water soluble.

[0040] Preferably, the quantum dots are nanometer particles having a particle size between 0-20 nm.

[0041] Specifically, the film formation process of the retardation layer 14 includes an operation of spray coating, spin coating, printing, or slot die coating.

[0042] Specifically, the polarization plate may serve as an upper polarizer or a lower polarizer of a liquid crystal display panel. Since the quantum dots contained in the retardation layer 14 has the property of light emission, it provides an effect of increasing color gamut coverage. Preferably, the polarization plate is used as the upper polarizer of a liquid crystal display panel. Since the disk-like liquid crystal contained in the retardation layer 14 has an effect of viewing angle compensation, the quantum dot polarization plate, when serving as an upper polarizer of a liquid crystal display panel, may allow for viewing angle compensation for the liquid crystal display panel to thereby provide a wide view angle for a display device.

[0043] Further, the retardation layer 14 and the protection layer 12 are respectively arranged at opposite sides of the polarization layer 13 so that the retardation layer 14 and the protection layer 12 collectively provide protection to the polarization layer 13 to prevent the polarization layer 13 from being influenced by the surroundings.

[0044] Specifically, the polarization layer 13 comprises an iodine-series polarization film or a dye-series polarization film; and the polarization layer 13 is formed of a material comprising polyvinyl alcohol.

[0045] Specifically, the protection layer 12 is formed of a material comprising triacetyl cellulose; the adhesive layer 15 is formed of a material of pressure-sensitive adhesive, preferably polyacrylic acid ester pressure-sensitive adhesive.

[0046] Specifically, as shown in FIG. 3, to use the quantum dot polarization plate, the release film 16 is peeled off so that the quantum dot polarization plate can be attached, by means of the adhesive layer 15, to a substrate 2 to be attached to. After the attachment, it often needs to remove the surface protection film 11.

[0047] Specifically, the quantum dot polarization plate of the present invention is applicable to a BOA (Black matrix On Array), COA (Color filter On Array), or GOA (Gate Driver on Array) liquid crystal panel.

[0048] In summary, the present invention provides a quantum dot polarization plate, which comprises a retardation layer, and the retardation layer is formed of a mixture of quantum dots and disk-like liquid crystal by means of a film formation process so as to possess dual functions of light emission and viewing angle compensation thereby reducing the operations required for manufacturing the quantum dot polarization plate and allowing the quantum dot polarization plate to maintain light polarity, while effectively increasing color gamut coverage of a display and achieving wide view angle of the display, and the manufacturing operation thereof is simple.

[0049] Based on the description given above, those having ordinary skills of the art may easily contemplate various changes and modifications of the technical solution and technical ideas of the present invention and all these changes and modifications are considered within the protection scope of right for the present invention.