1. A drive comprising:
an electric motor having a motor shaft;
a gearbox;
a housing holding the motor; and
a direction-dependent brake operatively connected to the motor and the gearbox, the direction dependent brake including
a driver connected to the motor shaft,
a drive output connected to the gearbox and coupled to the driver and freely pivotable around a small angle,
a plurality of clamping devices, and
a clamping ring cooperating with the plurality of clamping devices so that the brake conveys a torque originating in the electric motor to the drive output and halts a back-driving torque of the drive output, wherein the clamping ring is connected radially movable relative to the housing so that the clamping ring can be moved radially by at least one of the clamping devices after overcoming a specified force.
2. The drive according to claim 1, wherein the clamping ring is elastically connected to the motor housing or the gearbox.
3. The drive according to claim 1, wherein the clamping ring is frictionally connected to the motor housing or the gearbox.
4. The drive according to claim 1, further comprising a spring for spring-loading the clamping ring against a part attached to the housing.
5. The drive according to claim 1, wherein the clamping ring lies against a cover or an end plate provided in the direction-dependent brake.
6. The drive according to claim 1, further comprising a brake housing, wherein the clamping ring and the clamping devices are arranged in a brake housing, in which the clamping ring is radially movable within the brake housing.
7. The drive according to claim 1, wherein there are three clamping devices with two clamping devices being rigid support devices and one clamping device being a movable clamping device.
8. The drive according to claim 7, wherein the angular distance of the rigid support devices relative to each other is greater than the angular distance between a support device and the movable clamping device.
9. The drive according to claim 8, wherein the angular distance of the rigid support devices lies in the range between 120\xb0 and 175\xb0.
10. The drive according to claim 7, wherein the movable clamping device is formed by two roller bodies, which are spaced from each other with a spring.
11. The drive according to claim 1, wherein the number of clamping device is three and wherein one clamping device is a roll body and the other two clamping devices are rigid support devices.
12. The drive according to claim 1, wherein the drive output has a recess with a control surface, the movable clamping device being accommodated in the recess.
13. The drive according to claim 1, wherein the clamping devices each have an outer friction surface in the form of a circular ring segment, each ring segment being frictionally connected tangentially to the clamping ring in a radially loaded state.
14. The drive according to claim 1, wherein one of the clamping devices faces the motor shaft and has two surfaces sloped toward a tangent, which cooperates with complementary mating surfaces of the drive output, a maximum of one slope surface per clamping device being engaged with a corresponding mating surface of the drive output.
15. The drive according to claim 14, wherein the drive output is crown-like and has three coupling protrusions protruding axially from a ring area on which the corresponding mating surfaces are formed.
16. The drive according to claim 1, wherein the drive output has two coupling surfaces per coupling protrusion, which cooperate with mating coupling surfaces of the driver.
17. The drive according to claim 16, wherein the driver has at least two radial protrusions on which the mating coupling surfaces are formed.
18. The drive according to claim 16, wherein the driver has at least one drive surface that cooperates tangentially with a mating drive surface of at least one clamping device.
19. The drive according to claim 1, wherein during operation of the motor at least one drive surface of the driver lies against a mating drive surface of at least one of the clamping devices and against a coupling surface of the drive output, in which the sloped surfaces and the at least one clamping device and the complementary mating surfaces of drive output are arranged relative to each other so that no radial force component is exerted on the at least one clamping device.
20. The drive according to claim 1, further comprising: a coupling device, wherein, during operation, at least one sloped surface of at least one clamping device lies against a complementary mating surface of the driver output so that, during further pivoting, a radial force component is exerted on the at least one clamping device and the outer surface of the coupling device, which represents a braking surface, and rubs against a mating braking surface of the clamping ring or frictionally connects the corresponding surfaces so that the rotational movement of the drive output is braked.
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 compound comprising a first ligand L1;
wherein L1 comprises the following formula:
wherein E1 is N;
wherein E2 is B;
wherein R3 and R4 represent mono, di, tri, tetra substitutions or no substitution;
wherein R1, R2, R3 and R4 are each independently selected from the group consisting of hydrogen, deuterium, halide, alkyl, cycloalkyl, heteroalkyl, arylalkyl, alkoxy, aryloxy, amino, silyl, alkenyl, cycloalkenyl, heteroalkenyl, alkynyl, aryl, heteroaryl, acyl, carbonyl, carboxylic acids, ester, nitrile, isonitrile, sulfanyl, sulfinyl, sulfonyl, phosphino, and combinations thereof;
wherein any two adjacent R1, R2, R3, and R4 are optionally joined to form a ring, which may be further substituted;
wherein (i) at least one R1, R2, R3, or R4 is a 5-or 6-membered heteroaryl ring A containing a nitrogen, (ii) at least one pair of adjacent substituents R1, R2, R3, and R4 form a fused ring B that includes E1 or E2, or (iii) both (i) and (ii);
wherein ring A, ring B, or both ring A and ring B are coordinated to metal M;
wherein ring A and ring B can be further substituted;
wherein L1 is coordinated to a metal M, provided that the metal M does not form bond with E1 and E2; and
wherein L1 may be linked with other ligands to comprise a bidentate, tridentate, tetradentate, pentadentate or hexadentate ligand.
2. The compound of claim 1, wherein the metal M is a metal selected from the group consisting of Ir, Pt, Re, Os, Ru, Rh, Pd, Cu, Ag, and Au.
3. The compound of claim 1, wherein the metal M is Ir.
4. The compound of claim 1, wherein the metal M is Pt.
5. The compound of claim 1, wherein at least one of R1 and R2 is aryl or substituted aryl.
6. The compound of claim 5, wherein at least one of R1 and R2 is phenyl, or 2,6-disubstituted phenyl.
7. The compound of claim 1, wherein the compound is homoleptic.
8. The compound of claim 1, wherein the compound is heteroleptic.
9. The compound of claim 8, wherein the compound comprises a second ligand L2;
wherein the ligand L2 or part of the ligand L2 if the ligand is more than bidentate is selected from the group consisting of:
wherein Ra, Rb, Rc, and Rd may represent mono, di, tri, or tetra substitution, or no substitution;
wherein Ra, Rb, Rc, and Rd are independently selected from the group consisting of hydrogen, deuterium, halide, alkyl, cycloalkyl, heteroalkyl, arylalkyl, alkoxy, aryloxy, amino, silyl, alkenyl, cycloalkenyl, heteroalkenyl, alkynyl, aryl, heteroaryl, acyl, carbonyl, carboxylic acids, ester, nitrile, isonitrile, sulfanyl, sulfinyl, sulfonyl, phosphino, and combinations thereof; and
wherein two adjacent substituents of Ra, Rb, Rc, and Rd are optionally joined to form a fused ring or form a multidentate ligand.
10. The compound of claim 1, wherein the compound having the formula:
wherein L2 is a second ligand coordinated to the metal M;
wherein each L2 can be same or different;
wherein m is a value from 1 to the maximum number of ligands that may be attached to the metal M;
wherein m+n is the maximum number of ligands that may be attached to the metal M; and
wherein any of R1, R2, and R3 are optionally linked to L2 to comprise a bidentate, tridentate, tetradentate, pentadentate or hexadentate ligand.
11. The compound of claim 10, wherein at least one of R1, R2, and R3 are linked to L2 to comprise a bidentate, tridentate, tetradentate, pentadentate or hexadentate ligand.
12. The compound of claim 10, wherein the compound is selected from the group consisting of:
wherein X1, X2 is selected from the group consisting of C, N, O, P, S, and B;
wherein A is a 5-membered or 6-membered carbocyclic or heterocyclic ring;
wherein R5 represents mono, di, tri, tetra substitutions or no substitution;
wherein R5 is selected from the group consisting of hydrogen, deuterium, halide, alkyl, cycloalkyl, heteroalkyl, arylalkyl, alkoxy, aryloxy, amino, silyl, alkenyl, cycloalkenyl, heteroalkenyl, alkynyl, aryl, heteroaryl, acyl, carbonyl, carboxylic acids, ester, nitrile, isonitrile, sulfanyl, sulfinyl, sulfonyl, phosphino, and combinations thereof; and
wherein any two adjacent R1, R2, R3, R4, and R5 are optionally joined to form a ring, which may be further substituted.
13. The compound of claim 12, wherein A is selected from the group consisting of:
wherein Y is selected from the group consisting of BR, NR, PR, O, S, Se, C\u2550O, S\u2550O, SO2, CRR\u2032, SiRR\u2032, and GeRR\u2032;
wherein R, R\u2032 are independently selected from the group consisting of hydrogen, deuterium, halide, alkyl, cycloalkyl, heteroalkyl, arylalkyl, alkoxy, aryloxy, amino, silyl, alkenyl, cycloalkenyl, heteroalkenyl, alkynyl, aryl, heteroaryl, acyl, carbonyl, carboxylic acids, ester, nitrile, isonitrile, sulfanyl, sulfinyl, sulfonyl, phosphino, and combinations thereof; and
wherein R, R\u2032 are optionally joined to form a ring with any adjacent substituent.
14. The compound of claim 10, wherein the compound is selected from the group consisting of:
15. The compound of claim 14, wherein m is 3, and n is 0.
16. The compound of claim 14, wherein m is 1, and n is 2.
17. The compound of claim 14, wherein L2 is selected from the group consisting of:
18. The compound of claim 10, wherein the compound is selected from the group consisting of:
19. The compound of claim 1, wherein R1 comprises a 5-membered or 6-membered carbocyclic or heterocyclic aromatic ring; and
wherein R1 is coordinated to the metal M.
20. The compound of claim 1, wherein R2 comprises a 5-membered or 6-membered carbocyclic or heterocyclic aromatic ring; and
wherein R2 is coordinated to the metal M.
21. The compound of claim 19, wherein R1 comprises at least one of the chemical groups selected from the group consisting of:
22. The compound of claim 20, wherein R2 comprises at least one of the chemical groups selected from the group consisting of:
23. A first device comprising a first organic light emitting device, further comprising:
an anode;
a cathode; and
an organic layer, disposed between the anode and the cathode, comprising a compound comprising a ligand L1;
wherein L1 comprises the following formula:
wherein E1 is N;
wherein E2 is B;
wherein R3 and R4 represent mono, di, tri, tetra substitutions or no substitution;
wherein R1, R2, R3 and R4 are each independently selected from the group consisting of hydrogen, deuterium, halide, alkyl, cycloalkyl, heteroalkyl, arylalkyl, alkoxy, aryloxy, amino, silyl, alkenyl, cycloalkenyl, heteroalkenyl, alkynyl, aryl, heteroaryl, acyl, carbonyl, carboxylic acids, ester, nitrile, isonitrile, sulfanyl, sulfinyl, sulfonyl, phosphino, and combinations thereof;
wherein any two adjacent R1, R2, R3, and R4 are optionally joined to form a ring, which may be further substituted;
wherein (i) at least one R1, R2, R3, or R4 is a 5-or 6-membered heteroaryl ring A containing a nitrogen, (ii) at least one pair of adjacent substituents R1, R2, R3, and R4 form a fused ring B that includes E1 or E2, or (iii) both (i) and (ii);
wherein ring A, ring B, or both ring A and ring B are coordinated to metal M;
wherein ring A and ring B can be further substituted;
wherein L1 is coordinated to a metal M having an atomic weight higher than 40, provided that the metal M does not form bond with E1 and E2; and
wherein L1 may be linked with other ligands to comprise a bidentate, tridentate, tetradentate, pentadentate or hexadentate ligand.
24. The first device of claim 23, wherein the first device is a consumer product.
25. The first device of claim 23, wherein the first device is an organic light-emitting device.
26. The first device of claim 23, wherein the first device comprises a lighting panel.
27. The first device of claim 23, wherein the organic layer is an emissive layer and the compound is an emissive dopant.
28. The first device of claim 23, wherein the organic layer is an emissive layer and the compound is a non-emissive dopant.
29. The first device of claim 23, wherein the organic layer further comprises a host.
30. The first device of claim 29, wherein the host comprises a triphenylene containing benzo-fused thiophene or benzo-fused furan;
wherein any substituent in the host is an unfused substituent independently selected from the group consisting of Cn, H2n+1, OCnH2n+1, OAr1, N(CnH2n+1)2, N(Ar1)(Ar2), CH\u2550CH\u2014CnH2n+1, C\u2261C\u2014CnH2n+1, Ar1, Ar1\u2014Ar2, CnH2n\u2014Ar1, or no substitution;
wherein n is from 1 to 10; and
wherein Ar1 and Ar2 are independently selected from the group consisting of benzene, biphenyl, naphthalene, triphenylene, carbazole, and heteroaromatic analogs thereof.
31. The first device of claim 29, wherein the host comprises at least one of the chemical groups selected from the group consisting of carbazole, dibenzothiphene, dibenzofuran, dibenzoselenophene, azacarbazole, aza-dibenzothiophene, aza-dibenzofuran, and aza-dibenzoselenophene.
32. The first device of claim 29, wherein the host is selected from the group consisting of:
and combinations thereof.
33. The first device of claim 29, wherein the host comprises a metal complex.
34. A formulation comprising a compound according to claim 1.