Display device and method of manufacturing transparent substrate for display device
First Claim
1. A display device comprising:
- a substrate;
a laminate structure formed on the substrate and comprising a plurality of layers including a display region; and
recessed/projected portions formed at least one of an outermost surface of display side, an interface of the plurality of layers and an interface between the substrate and the laminate structure, either one of the substrate and the laminate structure having the outermost surface of display side, projected portions of the recessed/projected portions having a mean circle-equivalent diameter ranging from 50 nm to 250 nm with the standard deviation of circle-equivalent diameter of the projected portions being within the range of 10 to 50% of the mean circle-equivalent diameter, and a mean height ranging from 100 nm to 500 nm with the standard deviation of height being within the range of 10 to 50% of the mean height; and
the projected portions having a circularity coefficient ranging from 0.6 to 1, and an area ratio ranging from 20 to 75%.
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Accused Products
Abstract
A display device comprises a substrate and a laminate structure formed on the substrate and comprising a plurality of layers including a display region. The laminate structure has a recessed/projected portions at least one of an outermost surface of display side and an interface between the layers. The projected portions of the recessed/projected portions have a mean circle-equivalent diameter ranging from 50 nm to 250 nm with the standard deviation of circle-equivalent diameter of the projected portions being within the range of 10 to 50% of the mean circle-equivalent diameter, and a mean height ranging from 100 nm to 500 nm with the standard deviation of height being within the range of 10 to 50% of the mean height. The projected portions have a circularity coefficient ranging from 0.6 to 1, and an area ratio ranging from 20 to 75%.
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Citations
22 Claims
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1. A display device comprising:
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a substrate;
a laminate structure formed on the substrate and comprising a plurality of layers including a display region; and
recessed/projected portions formed at least one of an outermost surface of display side, an interface of the plurality of layers and an interface between the substrate and the laminate structure, either one of the substrate and the laminate structure having the outermost surface of display side, projected portions of the recessed/projected portions having a mean circle-equivalent diameter ranging from 50 nm to 250 nm with the standard deviation of circle-equivalent diameter of the projected portions being within the range of 10 to 50% of the mean circle-equivalent diameter, and a mean height ranging from 100 nm to 500 nm with the standard deviation of height being within the range of 10 to 50% of the mean height; and
the projected portions having a circularity coefficient ranging from 0.6 to 1, and an area ratio ranging from 20 to 75%. - View Dependent Claims (2, 3, 4)
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5. A method for manufacturing a transparent substrate for a display device comprising:
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forming a polymer layer containing a copolymer selected from block copolymers and graft copolymers on at least one major surface of a transparent substrate;
subjecting the polymer layer to annealing treatment to phase-separate the copolymer;
removing one of the phases of the copolymer that has been phase-separated to form a mask layer having a pattern formed of the residual phase; and
transcribing the pattern of mask layer onto a surface of the transparent substrate, thereby forming a surface-roughened substrate having a large number of recessed/projected portions, projected portions of the recessed/projected portions being meet the following conditions;
(1) a mean circle-equivalent diameter ranging from 50 nm to 250 nm with the standard deviation of circle-equivalent diameter of the projected portions being within the range of 10 to 50% of the mean circle-equivalent diameter;
(2) a mean height ranging from 100 nm to 500 nm with the standard deviation of height being within the range of 10 to 50% of the mean height;
(3) a circularity coefficient ranging from 0.6 to 1; and
(4) an area ratio ranging from 20 to 75%. - View Dependent Claims (6, 7, 8, 9, 10, 11, 12, 13)
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14. A method for manufacturing a transparent substrate for a display device comprising:
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forming a polymer layer containing a copolymer selected from block copolymers and graft copolymers on a cast molding substrate;
subjecting the polymer layer to annealing treatment to phase-separate the copolymer;
removing one of the phases of the copolymer that has been phase-separated to form a mask layer having a pattern formed of the residual phase; and
transcribing the pattern of mask layer onto a surface of the cast molding substrate, thereby obtaining a cast mold pattern having a large number of recessed/projected portions;
forming a resist film on at least one of major surfaces of a transparent substrate;
press-contacting the cast mold pattern onto the resist film to form a resist pattern having a large number of recessed/projected portions; and
working the transparent substrate by using the resist pattern as a mask, projected portions of the recessed/projected portions being meet the following conditions;
(1) a mean circle-equivalent diameter ranging from 50 nm to 250 nm with the standard deviation of circle-equivalent diameter of the projected portions being within the range of 10 to 50% of the mean circle-equivalent diameter;
(2) a mean height ranging from 100 nm to 500 nm with the standard deviation of height being within the range of 10 to 50% of the mean height;
(3) a circularity coefficient ranging from 0.6 to 1; and
(4) an area ratio ranging from 20 to 75%. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22)
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Specification