Display device
According to one embodiment, there is provided a display device including a display module and a cover member, bonded together by a photosensitive resin layer. A portion of the photosensitive resin layer that is located behind a light-shielding portion (in other words, located in a shaded portion) with respect to the light for curing the photosensitive resin is cured.
1. A display device comprising:
a display module comprising a display area which displays an image, and a peripheral area located outside the display area;
a cover member comprising a flat surface including a phototransmissive portion facing the display area, and a light-shielding area facing the peripheral area; and
a photosensitive resin layer which is provided between the display module and the cover member, and bonds the display module to the cover member, and
a curing lightguide member provided between the light-shielding area and the display module, and including a light entrance face and a light exit face opposed to the light entrance face,
wherein
an outer edge portion of the light-shielding area protrudes from the peripheral area,
the photosensitive resin layer comprises a first portion and a second portion, the first portion being provided over an entire part between the display area and the phototransmissive portion, the second portion extending from the first portion to a portion located under the light-shielding area,
the curing lightguide member is configured to transmit light having a wavelength for curing the photosensitive resin layer therethrough to make the light incident upon the photosensitive resin layer,
the light exit face faces an edge of the second portion, and
the curing lightguide member contacts the outer edge portion of the light-shielding area.
2. The display device of claim 1 , wherein
the curing lightguide member comprises:
a light-entrance-end area including the light entrance face which the light enters;
a light-exit-end area including the light exit face from which the light exits toward the photosensitive resin layer; and
a light concentration area which is located between the light-exit-end area and the light-entrance-end area, and includes a first reflective face by which the light passing through the curing lightguide member is totally internally reflected, wherein
the light-entrance-end area is thicker than the light-exit-end area.
3. The display device of claim 1 , wherein
the curing lightguide member comprises a second reflective face provided obliquely with respect to light emitted substantially perpendicularly to the flat surface of the cover member, and the second reflective face reflects the light entering the curing lightguide member in a direction of the photosensitive resin layer and thus changes a travelling direction of the light.
4. The display device of claim 1 , wherein
the curing lightguide member comprises:
a light-entrance-end area including the light entrance face which the light enters;
a light-exit-end area including a light exit face from which emits the light exits toward the photosensitive resin layer; and
a light concentration area which is provided between the light-exit-end area and the light-entrance-end area, and includes a first reflective face by which the light passing through the curing lightguide member is totally internally reflected, wherein
the light-entrance-end area includes a second reflective face provided obliquely with respect to light emitted substantially perpendicularly to the flat surface of the cover member, and the second reflective face reflects the light entering the curing lightguide member in a direction of the photosensitive resin layer and thus changes a travelling direction of the light, and
the light-entrance-end area is thicker than the light-exit-end area.
5. The display device of claim 1 , wherein
the photosensitive resin layer is of an ultraviolet-cured resin, and
the curing lightguide member transmits light having an ultraviolet wavelength therethrough.
6. The display device of claim 5 , wherein
the ultraviolet wavelength is in a range of 365 to 405 nm, and
the curing lightguide member has a transmittance of 80% or greater with respect to ultraviolet light in the range of 365 to 405 nm.
7. The display device of claim 1 , wherein
the curing lightguide member is formed of polyethylene terephthalate.
8. A display device comprising:
a display panel comprising a display area which displays an image, and a peripheral area located outside the display area;
a cover member comprising a phototransmissive portion overlapping the display area, and a light-shielding area overlapping the peripheral area; and
a photosensitive resin layer which bonds the display panel with the cover member, wherein
an outer edge portion of the light-shielding area protrudes from an edge face of the display panel,
the photosensitive resin layer comprises:
a first portion provided between the display area and the phototransmissive portion;
a second portion provided between the peripheral area and the light-shielding area, and
a lightguide sheet is provided between the cover member and the display panel, and transmits light having a wavelength for curing the photosensitive resin layer therethrough, and
the lightguide sheet contacts the outer edge portion of the light-shielding area.
9. The display device of claim 8 , wherein
the lightguide sheet comprises:
a light entrance area which the light enters; and
a light exit area through which the light exits, wherein
the light entrance area is thicker than the light exit area.
10. The display device of claim 8 , wherein
the phototransmissive portion of the cover member comprises a flat surface, and
the lightguide sheet comprises a reflective face provided obliquely with respect to the flat surface of the phototransmissive portion.
11. The display device of claim 9 , wherein
the display area of the display panel comprises a flat surface, and
the lightguide sheet comprises a reflective face between the light entrance area and the light exit area, and the reflective face is provided obliquely with respect to the flat surface of the display area.
12. The display device of claim 8 , wherein
the photosensitive resin layer is of an ultraviolet-cured resin, and
transmits light having an ultraviolet wavelength therethrough.
13. The display device of claim 12 , wherein
the ultraviolet wavelength is in a range of 365 to 405 nm, and
the lightguide sheet has a transmittance of 80% or greater with respect to ultraviolet light in the range of 365 to 405 nm.
14. The display device of claim 8 , wherein
the lightguide sheet is formed of polyethylene terephthalate.