Electronic device and illumination device
View Patent ↗According to one embodiment, an electronic device including a display panel, a casing including an opening, a plate-like light guiding member having a part thereof located in the opening, a masking member overlapping with a part of the light guiding member, a projection projecting from the light guiding member around the masking member, a light source provided in the casing to supply light to the light guiding member and emit the light to the outside of the projection, and a power supply unit configured to be switched between a first mode and a second mode.
1. An electronic device comprising:
a display panel;
a casing enclosing the display panel and comprising an opening;
a plate-like light guide;
a masking member configured to overlap with the light guide to cover a part of the light guide;
a projection in the light guide and projecting around the masking member;
a light source in the casing configured to supply light to the light guide and emit the light to an outside of the projection; and
a power supply connected to the light source and configured to be switched between a first mode and a second mode, wherein the first mode comprises a first amount of current sufficient to irradiate an entire portion of the projection, and wherein the second mode comprises a smaller amount of current than in the first mode sufficient to irradiate a part of the projection.
2. The electronic device of claim 1 , wherein the light source is at a position which overlaps with the projection and is opposite to a position close to the display panel.
3. The electronic device of claim 2 , wherein the projection is coated with a film configured to pass through part of light reaching the projection, and to reflect other part of the light reaching the projection.
4. The electronic device of claim 3 , further comprising:
a first wall portion close to a central portion of the light guide;
a second wall portion close to an outer peripheral portion of the light guide; and
a substrate between the first and second wall portions and provided with the light source,
wherein a distance between the first wall portion and the light source is greater than a distance between the second wall portion and the light source.
5. The electronic device of claim 4 , wherein a part of the projection opposes the light source.
6. An electronic device comprising:
a display panel;
a casing enclosing the display panel and comprising an opening;
a plate-like light guide;
a projection in the light guide;
a light source in the casing configured to supply light to the light guide;
a first wall portion close to a central portion of the light guide; and
a second wall portion close to an outer peripheral portion of the light guide,
wherein the light source is between the first and second wall portions, and a distance between the first wall portion and the light source is greater than a distance between the second wall portion and the light source.
7. An illumination device comprising:
a casing comprising an opening;
a plate-like light guide;
a masking member configured to overlap with the light guide to cover a part of the light guide;
a projection in the light guide and projecting around the masking member;
a light source in the casing configured to supply light to the light guide and emit the light to an outside of the projection; and
a power supply connected to the light source and configured to be switched between a first mode and a second mode, wherein the first mode comprises a first amount of current sufficient to irradiate an entire portion of the projection, and where in the second mode comprises a smaller amount of current than in the first mode sufficient to irradiate a part of the projection.