2D/3D display apparatus
View Patent ↗Switching between 2D and 3D visualization is achieved by an optical-index matching fluid ( 9 ) which can be brought between a lenticular sheet ( 6, 7 ) and a top plate ( 10 ). The fluid may contain two immiscible fluids while switching is based on (re)distribution of the fluids due to electrostatic forces.
1. A display apparatus, comprising:
a display device for displaying images comprising pixels; and
means for switching between different types of images coming from the pixels, wherein the means for switching between the different types of images comprise at least one reservoir which is provided with elements having a lens action at the area of a wall of the reservoir and is also provided with means for filling, at the area of the elements having a lens action, the reservoir between the wall provided with elements having a lens action and a facing transparent wall with a fluid having a refractive index which is substantially identical to that of the elements having a lens action,
wherein a pitch of the elements having the lens action is larger than that of the pixels, and
wherein the fluid comprises a metatungetate.
2. A display apparatus as claimed in claim 1 , wherein the switching means switch the display device between a stereoscopic image and a plane image.
3. A display apparatus provided with a display device for displaying images comprising pixels and further provided with means for switching between different types of images coming from the pixels, in which the means for switching between the different types of images comprise at least one reservoir which is provided with elements having a lens action at the area of a wall of the reservoir, and the reservoir contains at least two substantially immiscible fluids having a different refractive index as well as a difference of electrical conductivity, said display device being also provided with drive means for displacing the fluids with respect to each other.
4. A display apparatus as claimed in claim 3 , wherein the switching means switch the display device between a stereoscopic image and a plane image.
5. A display apparatus as claimed in claim 3 , with two immiscible fluids having a different refractive index, one of which is electrically conducting and one of which is substantially insulating.
6. A display apparatus as claimed in claim 3 , wherein the drive means comprise at least two electrodes at the area of the wall of the reservoir, which electrodes can be electrically coupled to the fluids.
7. The display apparatus of claim 6 , wherein the electrodes are each provided with a fluoropolymer insulating coating.
8. The display apparatus of claim 3 , further comprising optically transparent electrodes disposed on the elements having a lens action.
9. The display apparatus of claim 8 , further comprising a hydrophobic coating on the transparent electrodes.
10. The display apparatus of claim 3 , wherein a first one of the two fluids comprises a metatungstate.
11. The display apparatus of claim 10 , wherein a second one of the two fluids comprises a non-polar oil.
12. The display apparatus of claim 3 , wherein a pitch of the elements having the lens action is larger than a pitch of the pixels.
13. A display apparatus comprising:
a display device for displaying images comprising pixels; and
means for switching between different types of images coming from the pixels,
wherein the means for switching between the different types of images comprises a plurality of reservoirs, each reservoir having,
an element having a lens action, disposed on first wall of the reservoir,
at least two substantially immiscible fluids having a different refractive index as well as a difference of electrical conductivity, the two fluids both being disposed between the element having the lens action and a second wall of the reservoir opposite the first wall, and
drive means for displacing the fluids with respect to each other.
14. The display apparatus of claim 13 , wherein the switching means switch the display device between a stereoscopic image and a plane image.
15. The display apparatus of claim 13 , with two immiscible fluids having a different refractive index, one of which is electrically conducting and one of which Is substantially insulating.
16. The display apparatus of claim 13 , wherein the drive means comprise at least two electrodes at the area of the wall of the reservoir, which electrodes can be electrically coupled to the fluids.
17. The display apparatus of claim 13 , wherein a first one of the two fluids comprises a metatungstate.
18. The display apparatus of claim 13 , wherein a pitch of the elements having the lens action is larger than a pitch of the pixels.
19. The display apparatus of claim 13 , wherein the element having the lens action comprises a polymer acrylate.
20. The display apparatus of claim 13 , wherein the drive means comprises a transparent electrode disposed in the reservoir on the element having the lens action.