1. A lighting device, comprising:
a plurality of surface light emitting plates each including a light guide portion and a light source portion integral with the light guide portion, the plurality of surface light emitting plates being two-dimensionally arranged;
the light guide portion including a light emitting surface for emitting light from the light source portion and a lower surface opposed to the light emitting surface; and
the light source portion of a first surface light emitting plate of the plurality of surface light emitting plates two-dimensionally overlapping with the light guide portion of a second surface light emitting plate of the plurality of surface light emitting plates which is adjacent to the first surface light emitting plate.
2. A lighting device according to claim 1, wherein:
the light guide portion has a wedge cross section;
the light source portion has an upper surface; and
the light guide portion of the second surface light emitting plate overlaps the upper surface of the light source portion of the first surface light emitting plate.
3. A lighting device according to claim 1 or 2, wherein the light emitting surface comprises a diffusion surface for diffusing light.
4. A lighting device according to claim 3, wherein the light emitting surface has a plurality of alternating V-grooves and trapezoidal grooves.
5. A lighting device according to claim 4, wherein:
an angle formed between the light emitting surface and one of a tilt surface of each of the plurality of V-grooves and a tilt surface of each of the plurality of trapezoidal grooves is 20\xb0 to 45\xb0 ; and
a pitch between the plurality of V-grooves and trapezoidal grooves is 0.1 mm to 0.2 mm.
6. A lighting device according to claim 2, wherein:
the light source portion comprises a light source including a light emitting surface;
the light guide portion further comprises a bottom surface; and
an angle formed between the light emitting surface of the light source and the bottom surface of the light guide portion is 90\xb0 to 95\xb0.
7. A lighting device according to claim 2, wherein the light guide portion comprises prisms formed on a lower surface thereof to reflect light from the light source portion to the light emitting surface.
8. A lighting device according to claim 7, wherein each of the prisms includes a reflecting surface formed such that an incident direction of the light from the light source portion is orthogonal to a line of intersection of the reflecting surface and the lower surface of the light guide portion.
9. A lighting device according to claim 8, wherein an angle formed between the lower surface of the light guide portion and the reflecting surface of each of the prisms increases as a distance from the light source portion reduces.
10. A lighting device according to claim 8, wherein each of the prisms has a size which reduces as a distance from the light source portion increases.
11. A lighting device according to claim 8, wherein a pitch between the prisms increases as a distance from the light source portion reduces.
12. A display device, comprising:
a lighting device including a plurality of surface light emitting plates which are two-dimensionally arranged; and
a non-self light emission type display element provided on an irradiation surface side of the lighting device, wherein:
each of the plurality of surface light emitting plates includes a light source portion and a light guide portion integral with the light source portion;
the light guide portion includes a light emitting surface for emitting light from the light source portion and a lower surface opposed to the light emitting surface; and
the light source portion of a first surface light emitting plate of the plurality of surface light emitting plates two-dimensionally overlaps with the light guide portion of a second surface light emitting plate of the plurality of surface light emitting plates which is adjacent to the first surface light emitting plate.
13. A display device according to claim 12, wherein:
the light guide portion has a wedge cross section;
the light source portion has an upper surface; and
the light guide portion of the second surface light emitting plate overlaps the upper surface of the light source portion of the first surface light emitting plate.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A high pressure pump, in particular for a fuel injection system for internal combustion engines, having at least one piston pump unit (2, 2\u2032) which has a piston (6) guided in a cylinder bore (7) and delimiting a working chamber (8), having a crank drive (13) for driving the piston (6), having a stroke ring (12) which is arranged between the crank drive (13) and the piston (6) and which is mounted such that it is driven rotatably with respect to the crank drive (13) but does not rotate and which has a flat sliding bearing surface (11), on which the piston (6) is supported with a sliding surface (10), wherein a connecting duct (34, 35) is formed in the stroke ring (12), said connecting duct (34, 35) opens at one, first end into the sliding bearing surface (11) and is connected to a fluid source by means of a fluid feed conduit (31, 32, 33) provided in the crank drive (13).
2. The high pressure pump as claimed in claim 1, wherein the fluid is a lubricant and the fluid feed conduct is a lubricant feed conduct.
3. The high pressure pump as claimed in claim 2, wherein the crank drive (13) has an eccentric element (15) and wherein the connecting duct (34, 35) opens at the other, second end into the inner surface (12a) of the stroke ring (12) which is in contact with the eccentric element (15), and wherein a lubricating groove (31) is provided on the circumference of the eccentric element (15), said lubricating groove (31) is open toward the outside and is connected to the lubricant source via a connecting line (32, 33) running in the eccentric element (15) and in the drive shaft (14).
4. The high pressure pump as claimed in claim 3, wherein the lubricating groove (31) extends over part of the circumference of the eccentric element (15).
5. The high pressure pump as claimed in claim 2, further comprising a relief chamber (22) which is arranged in the region of the sliding surface (10), is open toward the sliding bearing surface (11) and is fluidically separated from the working chamber (8).
6. The high pressure pump as claimed in claim 5, wherein an annular groove (36) is formed in the piston (6), said annular groove (36) surrounds the relief chamber (22) and is open toward the sliding bearing surface (11).
7. The high pressure pump as claimed in claim 6, wherein the annular groove (36) is connected to a chamber (5) in which the crank drive (13) and the stroke ring (12) are accommodated.
8. The high pressure pump as claimed in claim 5, wherein the opening of the relief chamber (22) is completely surrounded by the sliding surface (10) of the piston, said sliding surface (10) acting together with the sliding bearing surface (11) of the stroke ring (12).
9. The high pressure pump as claimed in claim 7, wherein a longitudinal groove (37) is formed in the stroke ring (12) in the region of the sliding bearing surface (11), said longitudinal groove (37) is open toward the sliding surface (10) and opens into said chamber (5), is offset with respect to the relief chamber (22) in the direction of the axis of rotation (14a) of the drive shaft (14) and communicates with the annular groove (36).
10. The high pressure pump as claimed in claim 5, wherein the pressure medium in the relief chamber (22) is a lubricant, preferably lubricating oil.
11. The high pressure pump as claimed in claim 2, wherein said connecting duct (34, 35) opens into the sliding bearing surface (11) at a point such that it is connected to the relief chamber (22) only in specific positions of the stroke ring (12) with respect to the piston (6) and is connected periodically to said lubricant feed conduit (31, 32, 33).
12. The high pressure pump as claimed in claim 11, wherein the lubricating groove (15) is arranged such that it is connected to the connecting duct (34, 35) in the stroke ring (12) when this connecting duct (34, 35) is connected to the relief chamber (22).
13. The high pressure pump as claimed in claim 5, wherein the relief chamber (22) is fluidically separated from the working chamber (8) by a pressure transmission element (25, 41) arranged in a passage (23) in the piston (6), said pressure transmission element (25, 41) is pressurized on one side by the medium to be delivered and on the opposite side by a pressure medium in the relief chamber (22) and can be displaced in the direction of the application of pressure under the action of pressure.
14. The high pressure pump as claimed in claim 13, wherein the pressure transmission element is a control piston (25) which can be displaced in a longitudinal bore (24) belonging to said passage (23) and is guided closely in a sliding manner.
15. The high pressure pump as claimed in claim 14, wherein the control piston (6) on its first end facing the relief chamber (22) is supported on a compression spring (26) which rests on an abutment at the other end.
16. The high pressure pump as claimed in claim 15, wherein said abutment is formed by a supporting element retained in the control piston (25).
17. The high pressure pump as claimed in claim 16, wherein said supporting element is a spring ring (27).
18. The high pressure pump as claimed in claim 13, wherein the pressure transmission element is a diaphragm (41) which can be deflected elastically, covers the passage (23) and is fixed in a sealing manner in its edge region.
19. The high pressure pump as claimed in claim 18, wherein the piston (6) has a piston element (38) guided in the cylinder bore (7) and a ring (39) which is connected to the piston element (38) at the end of the latter facing away from the working chamber (8).
20. The high pressure pump as claimed in claim 19, wherein the diaphragm (41) is held firmly in its edge region between the piston element (38) and the ring (39).
21. The high pressure pump as claimed in claim 2, wherein the crank drive (13) has an eccentric element (15) which is arranged on a rotatably driven drive shaft (14) with an eccentricity (e) and on which the stroke ring (12) is mounted such that it does not rotate with the eccentric element (15).
22. The high pressure pump as claimed in claim 2, wherein an annular collecting groove (28) is formed in the wall of the cylinder bore (7), said annular collecting groove (28) is open toward the piston (6), is used to collect seepage which passes through the gap between the wall of the cylinder bore (7) and the piston (6) and to which a discharge conduit (30) is connected.
23. The high pressure pump as claimed in claim 2, wherein the high pressure pump (1, 1\u2032) is designed to deliver fuel.
24. The high pressure pump as claimed in claim 23, wherein the high pressure pump (1, 1\u2032) is designed to deliver diesel fuel.