LIGHT SOURCE DEVICE
A light source device includes a light conversion unit, a heat radiation unit, and a heat storage unit. The light conversion unit emits illumination light. The heat radiation unit radiates heat generated in the light conversion unit. The heat storage unit is thermally connected to the light conversion unit or the heat radiation unit, and stores the heat.
1 . A light source device comprising:
a light conversion unit configured to emit illumination light;
a heat radiation unit configured to radiate heat generated in the light conversion unit; and
a heat storage unit which is thermally connected to the light conversion unit or the heat radiation unit and configured to store the heat.
2 . The device according to claim 1 ,
wherein the light conversion unit and the heat radiation unit are provided to be apart from each other, and
the device further comprises a heat transfer unit configured to transfer the heat generated in the light conversion unit to the heat radiation unit or the heat storage unit.
3 . The device according to claim 1 , wherein the heat storage unit includes a latent heat storage material.
4 . The device according to claim 1 , wherein the heat storage unit includes water.
5 . The device according to claim 1 , wherein the heat storage unit functions as the heat radiation unit.
6 . The device according to claim 2 , wherein the heat storage unit includes a latent heat storage material.
7 . The device according to claim 2 , wherein the heat storage unit includes water.
8 . The device according to claim 2 , wherein the heat storage unit functions as the heat radiation unit.
9 . The device according to claim 2 , wherein
the heat radiation unit includes a first heat radiation member and a second heat radiation member,
the first heat radiation member and/or the second heat radiation member is thermally connected to the light conversion unit via the heat transfer unit, and
heat characteristics of the first heat radiation member, the second heat radiation member, the heat transfer unit, and the heat storage unit are set in such a manner that a surface temperature of the first heat radiation member coincides with a surface temperature of the second heat radiation member.
10 . The device according to claim 9 , wherein
the heat transfer unit includes a first heat transfer member and a second heat transfer member,
the first heat radiation member is thermally connected to the light conversion unit via the first heat transfer member,
the second heat radiation member is thermally connected to the light conversion unit via the second heat transfer member, and
a thermal conductance of the first heat transfer member and a thermal conductance of the second heat transfer member are set in such a manner that a ratio of a quantity of heat transferred to the first heat radiation member and a quantity of heat transferred to the second heat radiation member has a predetermined value.
11 . The device according to claim 2 , wherein
the heat radiation unit includes a first heat radiation member and a second heat radiation member,
the heat storage unit includes a first heat storage member and a second heat storage member,
the first heat radiation member is thermally connected to the first heat storage member,
the second heat radiation member is thermally connected to the second heat storage member,
the first heat storage member and/or the second heat storage member is thermally connected to the light conversion unit via the heat transfer unit, and
a heat capacity of the first heat storage member and a heat capacity of the second heat storage member are set in such a manner that a time required until a surface temperature of the first heat radiation member reaches a predetermined value, after allowing the light conversion unit to function, becomes equal to a time required until a surface temperature of the second heat radiation member reaches a predetermined value, after the allowing the light conversion unit to function, in accordance with a heat radiation capability of the first heat radiation member and a heat radiation capability of the second heat radiation member.
12 . The device according to claim 2 , wherein the heat transfer unit functions as the heat radiation unit.
13 . The device according to claim 2 , wherein the device is configured to be bent between a portion at which the light conversion unit is placed and a portion at which the heat radiation unit is placed.
14 . The device according to claim 13 , wherein length of the heat transfer unit changes when the device is bent.
15 . The device according to claim 13 , wherein the heat transfer unit is twisted when the device is bent.
16 . The device according to claim 13 , wherein
the heat transfer unit and the heat radiation unit are not mechanically fixed, and
the heat transfer unit and the heat radiation unit are thermally connected via a fluid.
17 . The device according to claim 13 , wherein
the heat storage unit is deformable, and
the heat transfer unit and the heat radiation unit are thermally connected via the deformable heat storage unit.
18 . The device according to claim 13 , further comprising a deformable heat transfer member,
wherein the heat transfer unit and the heat radiation unit are thermally connected via the deformable heat transfer member.