Wavelength conversion member, backlight unit including wavelength conversion member, liquid crystal display device, and method of manufacturing wavelength conversion member
AssigneeFUJIFILM Corporation
InventorsTatsuya Oba, Tomonari Ogawa, Keisuke Oku
Life of this patent
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Abstract
The wavelength conversion member includes: a first substrate; a second substrate; and a wavelength conversion layer disposed between the first substrate and the second substrate and including quantum dots which are excited by excitation light to emit fluorescence. The wavelength conversion layer is a cured layer obtained by curing a polymerizable composition which includes the quantum dots and a polymerizable compound having a molecular weight of 200 or lower, and the number of bubble-shaped defects having a diameter of 0.1 mm or more in the wavelength conversion layer is less than 10 per 100 cm2.
Claims19
A wavelength conversion member comprising:
- a first substrate;
- a second substrate;
- and
- a wavelength conversion layer disposed between the first substrate and the second substrate and including quantum dots which are excited by excitation light to emit fluorescence,
- wherein the wavelength conversion layer is a cured layer obtained by curing a polymerizable composition which includes the quantum dots and a polymerizable compound having a molecular weight of 200 or lower, and
- the number of bubble-shaped defects having a diameter of 0.1 mm or more in the wavelength conversion layer is less than 10 per 100 cm2.
A method of manufacturing a wavelength conversion member,
- the wavelength conversion member including a first substrate, a second substrate, and a wavelength conversion layer disposed between the first substrate and the second substrate and including quantum dots which are excited by excitation light to emit fluorescence, and
- the method comprising:
- preparing a polymerizable composition which includes the quantum dots and a polymerizable compound having a boiling point of 190° C. or lower and a molecular weight of 200 or lower;
- forming a coating film by applying the polymerizable composition including the quantum dots to a single surface of the first substrate;
- forming the wavelength conversion layer by irradiating the coating film with active energy rays to cure the coating film while maintaining a film surface temperature T of the coating film in a temperature range defined by 25° C.<T<(the boiling point of the polymerizable composition-5)° C.;
- and
- laminating the second substrate on the wavelength conversion layer.
A method of manufacturing a wavelength conversion member,
- the wavelength conversion member including a first substrate, a second substrate, and a wavelength conversion layer disposed between the first substrate and the second substrate and including quantum dots which are excited by excitation light to emit fluorescence, and
- the method comprising:
- preparing a polymerizable composition which includes at least the quantum dots and a polymerizable compound having a boiling point of 190° C. or lower and a molecular weight of 200 or lower;
- forming a coating film by applying the polymerizable composition including the quantum dots to a single surface of the first substrate;
- laminating the second substrate on the coating film such that the coating film is interposed between the first substrate and the second substrate;
- and
- forming the wavelength conversion layer by irradiating the coating film with active energy rays to cure the coating film while maintaining a film surface temperature T of the coating film in a temperature range defined by 25° C.<T<(the boiling point of the polymerizable composition+15)° C.
Dependencies are inferred from the claim text.