Light emitting unit, liquid crystal module, display device, and lighting system
A display device includes a liquid crystal module ( 10, 20, 30 ) including a display panel ( 10 ) and a light emitting unit ( 20 ) that illuminates the display panel ( 10 ). The light emitting unit ( 20 ) includes a support substrate ( 24 ) that is disposed to face the display panel ( 10 ), a light guide member ( 21 ) that is provided between the display panel ( 10 ) and the support substrate ( 24 ), and has a first end surface ( 213 ) and a second end surface ( 214 ), a light source ( 22 ) that is disposed to face the first end surface ( 213 ), and a holding member ( 25 ) that is provided between the display panel ( 10 ) and the support substrate ( 24 ) along an outer edge of the support substrate ( 24 ), and has a facing surface joined to the second end surface ( 214 ). This display device has a structure suitable for a thin profile.
1. A display comprising:
a display panel,
a light emitting unit that faces the display panel in a first direction and illuminates the display panel,
a frame member that is a unitary structure having an anterior portion extending over a peripheral face region of the display panel and holds peripheries of the display panel and the light emitting unit, and
a buffer sheet,
wherein the light emitting unit includes:
a support substrate that is disposed to face the display panel;
a light guide member that is provided between the display panel and the support substrate, and has a first end surface and a second end surface;
a light source that is disposed to face the first end surface; and
a holding member that is provided between the display panel and the support substrate along an outer edge of the support substrate, and has a facing surface joined to at least one end surface of the light guide member, and
wherein
the buffer sheet is between the frame member and a surface on a side of the display panel opposite to the light emitting unit and has elasticity, and
the buffer sheet has a light shielding property.
2. The display device according to claim 1 , further comprising a scattering agent provided on a back surface of the light guide member.
3. The display device according to claim 2 , wherein the scattering agent is printed on the back surface of the light guide member.
4. The display device according to claim 2 , wherein the scattering agent is formed by roughening the back surface of the light guide member.
5. The display device according to claim 1 , wherein
the holding member has a facing surface joined to the second end surface such that the holding member holds the light guide member along the second end surface;
the second end surface faces the first end surface; and
the second end surface and the facing surface are joined by an adhesive member.
6. The display device according to claim 5 , wherein the adhesive member has elasticity.
7. The display device according to claim 1 , comprising a buffer element that is disposed between the support substrate and the light guide member.
8. The display device according to claim 7 , wherein the buffer sheet is a light shielding sheet.
9. The display device according to claim 1 , wherein the frame member surrounds the support substrate.
10. The display device according to claim 9 , wherein a portion of the buffer sheet conforms to an inner side of an anterior portion of the frame member.
11. The display device according to claim 1 , wherein
the second end surface faces the first end surface is a mirror surface and is covered with a light reflecting layer.
12. The display device according to claim 1 , wherein the support substrate includes a metal material, and the holding member includes a metal material.
13. The display device according to claim 1 , wherein the holding member is provided on a peripheral region of the support substrate and run along two end surfaces of the light guide member that are perpendicular to the first end surface.
14. The light emitting unit according to claim 1 , wherein the buffer sheet has an L-shape.
15. The display device according to claim 1 , wherein the support substrate includes claw portions that engage the holding member.
16. The display device according to claim 1 , wherein the buffer sheet is a light shielding member.
17. The display device according to claim 1 , wherein the light guide member comprises a glass material having a higher rigidity than resin materials and having a lower coefficient of thermal expansion than resin materials.
18. The display device according to claim 1 , wherein the second end surface faces the first end surface and is covered with a light absorbing layer.
19. The display device according to claim 1 , further comprising a reflection sheet disposed on a back surface of the light guide member.
20. The display device according to claim 1 , wherein the light guide member includes convex portions on a front surface.