Image projection optical module and head mounted display

1. An image projection optical module comprising: an image generating element configured to generate an image; an image display unit configured to display the image; and

a coupling member thermally connected to the image generating element,

wherein the coupling portion including a front heat dissipation portion on a front portion of the coupling member when a direction of line of sight of a user wearing a casing of a head mounted display provided with the image projection optical module is defined as a forward direction, the front heat dissipation portion being to dissipate heat, and

wherein the coupling member has an opening in which the image display unit is inserted, and an adiabatic member is provided between the coupling member and the image display unit, the adiabatic member being lower in thermal conductivity than the coupling member.

2. The image projection optical module according to claim 1 ,

wherein the front heat dissipation portion of the coupling member is thermally connected to an inner face of a front portion of the casing of the head mounted display provided with the image projection optical module.

3. The image projection optical module according to claim 1 ,

wherein the coupling member further includes an upper heat dissipation portion on an upper portion of the coupling member when a head top side of the user wearing the casing of the head mounted display is defined as an upper direction, the upper heat dissipation portion being to dissipate heat.

4. The image projection optical module according to claim 1 ,

wherein the front heat dissipation portion of the coupling member is disposed ahead of the image display unit.

5. The image projection optical module according to claim 1 ,

wherein the coupling member has an opening in which the image display unit is inserted.

6. The image projection optical module according to claim 3 ,

wherein the front heat dissipation portion of the coupling member is thermally connected to an inner face of a front portion of the casing of the head mounted display, and

the upper heat dissipation portion of the coupling member is thermally connected to an inner face of an upper portion of the casing of the head mounted display.

7. The image projection optical module according to claim 6 ,

wherein the front heat dissipation portion of the coupling member thermally connected to the inner face of the front portion of the casing is larger in area than the upper heat dissipation portion of the coupling member thermally connected to the inner face of the upper portion of the casing.

8. The image projection optical module according to claim 1 ,

wherein the front heat dissipation portion of the coupling member protrudes forward from an opening of the casing of the head mounted display.

9. The image projection optical module according to claim 3 ,

wherein the front heat dissipation portion of the coupling member protrudes forward from an opening of the casing of the head mounted display, and

the upper heat dissipation portion of the coupling member protrudes upward from an opening of the casing of the head mounted display.

10. The image projection optical module according to claim 9 ,

wherein a front of the front heat dissipation portion has a fin shape, and a top of the upper heat dissipation portion has a fin shape.

11. The image projection optical module according to claim 1 , further comprising:

a left optical case and a right optical case each housing the image generating element,

wherein the coupling member couples the left optical case and the right optical case.

12. The image projection optical module according to claim 1 , further comprising:

a light source configured to irradiate the image generating element with light,

wherein the light source is thermally connected to the coupling member.

13. The image projection optical module according to claim 1 ,

wherein the image generating element serves as a liquid crystal panel or an organic electroluminescent (EL) panel.

14. A head mounted display comprising:

an image projection optical including an image generating element configured to generate an image; an image display unit configured to display the image; and

a coupling member thermally connected to the image generating element,

wherein the coupling portion including a front heat dissipation portion on a front portion of the coupling member when a direction of line of sight of a user wearing a casing of the head mounted display is defined as a forward direction, the front heat dissipation portion being to dissipate heat, and

wherein the coupling member has an opening in which the image display unit is inserted, and an adiabatic member is provided between the coupling member and the image display unit, the adiabatic member being lower in thermal conductivity than the coupling member.

15. An image projection optical module comprising: an image generating element configured to generate an image; an image display unit configured to display the image; and

a coupling member thermally connected to the image generating element,

wherein the coupling portion including a front heat dissipation portion on a front portion of the coupling member when a direction of line of sight of a user wearing a casing of a head mounted display provided with the image projection optical module is defined as a forward direction, the front heat dissipation portion being to dissipate heat,

wherein the coupling member further includes an upper heat dissipation portion on an upper portion of the coupling member when a head top side of the user wearing the casing of the head mounted display is defined as an upper direction, the upper heat dissipation portion being to dissipate heat,

wherein the front heat dissipation portion of the coupling member protrudes forward from an opening of the casing of the head mounted display, and

wherein the upper heat dissipation portion of the coupling member protrudes upward from an opening of the casing of the head mounted display.