1. A phase difference detector for detecting a phase difference between input clocks which both have a same first frequency, comprising:
a pulse width conversion unit for converting the input clocks into a phase difference signal indicating by a pulse width a phase difference between the input clocks; and
a counter unit which samples a level of the phase difference signal using a reference clock having a second frequency which is slower than the first frequency, and counts the number of levels of the phase difference signal using a first weighting according to the sampled level of the phase difference signal, wherein
when a the count value of the counter unit transits in a predetermined range, the phase difference between the input clocks is detected according to the first weighting.
2. The phase difference detector according to claim 1, wherein
the pulse width conversion unit comprises a NOT circuit which inverts a logic of one of the input clocks, and an AND circuit which computes a logic AND of the one of the input clocks inverted by the NOT circuit and the other of the input clocks, and
output of the AND circuit is the phase difference signal.
3. The phase difference detector according to claim 1, wherein
the counter unit calculates the count value using a second weighting, which corrects the count value, and the first weighting, and
an adjusted phase difference between the input clocks is detected according to the second weighting.
4. The phase difference detector according to claim 1, wherein the counter comprises sampling units each of which samples a level of the phase difference signal respectively, and a fixed potential in place of the phase difference signal is input to one of the sampling units.
5. The phase difference detector according to claim 1 or claim 3, wherein
the counter unit comprises a plurality of transistors, a constant current source and a comparator, and
the first or second weighting is input by the plurality of transistors and the constant current source and the count value is output, and the comparator outputs a value to show whether the count value transits within the predetermined range.
6. The phase difference detector according to claim 1, further comprising:
a phase adjustment unit which adjusts a phase difference of the input clocks to be a target phase difference according to an output of the counter unit.
7. The phase difference detector according to claim 1, further comprising:
a dividing adjustment unit which counts a continuous appearance count of one of the levels of the phase difference signal, and divides the reference clock when the continuous appearance count value exceeds a maximum allowable continuous appearance count.
8. The phase difference detector according to claim 1, wherein the pulse width conversion unit comprises an AND circuit to which the input clocks are input and which computes a logic AND, and a fixed level is input to one of inputs of the AND circuit.
9. A phase difference detection method for detecting a phase difference between input clocks which both have a same first frequency, the method comprising:
converting the input clocks into a phase difference signal indicating by a pulse width a phase difference between the input clocks;
sampling a level of the phase difference signal using a reference clock having a second frequency which is slower than the first frequency and counting the number of levels of the phase difference using a first weighting according to the sampled level of the phase difference signal; and
detecting the phase difference between the input clocks according to the first weighting when a counted count value transits within a predetermined range.
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 having the formula Os(L)n, wherein Os is osmium(IV) metal, L is a ligand coordinating to Os, and n is an integer from 1 to 6;
wherein each L can be same or different;
wherein at least one L is a multidentate ligand; and
wherein the compound is neutral.
2. The compound of claim 1, wherein the multidentate ligand is selected from the group consisting of:
wherein X is a neutral coordinating atom selected from the group consisting of carbene, phosphorus, and nitrogen;
wherein C is an anionic coordinating carbon atom;
wherein N is an anionic coordinating nitrogen atom; and
wherein O is an anionic coordinating oxygen atom.
3. The compound of claim 2, wherein the neutral carbene is N-heterocyclic carbene;
wherein the neutral phosphorus is phosphorus atom of a trisubstituted phosphine; and wherein the neutral nitrogen is sp2 nitrogen atom of N-heterocyclic ring selected from the group consisting of pyridine, imidazole, benzoimidazole, pyrazole, and triazole.
4. The compound of claim 2, wherein the anionic coordinating carbon is sp2 carbon atom selected from the group consisting of benzene, pyridine, furan, thiophene, and pyrrole.
5. The compound of claim 2, wherein the anionic coordinating nitrogen is sp2 nitrogen atom of N-heterocyclic ring selected from the group consisting of imidazole, benzoimidazole, pyrazole, and triazole.
6. The compound of claim 2, wherein the anionic oxygen atom is oxygen atom from carboxylic acid or ether.
7. The compound of claim 2, wherein n is 2, and each L is a tridentate ligand.
8. The compound of claim 7, wherein the compound has a formula selected from the group consisting of:
9. The compound of claim 8, wherein the compound is selected from the group consisting of
10. The compound of claim 2, wherein n is 3 and each L is a bidentate ligand.
11. The compound of claim 10, wherein the compound has a formula selected from the group consisting of:
12. The compound of claim 11, wherein the compound is selected from the group consisting of
13. The compound of claim 2, wherein n is 3, one L is a tridentate ligand and two Ls are bidentate ligands.
14. The compound of claim 13, wherein the compound has a formula selected from the group consisting of:
15. The compound of claim 14, wherein the compound is selected from the group consisting of
16. The compound of claim 2, wherein one L is a tetradentate ligand.
17. The compound of claim 16, wherein the compound has a formula selected from the group consisting of:
18. The compound of claim 17, wherein the compound is selected from the group consisting of
19. The compound of claim 2, wherein the compound has a formula
wherein H is hydride.
20. The compound of claim 19, wherein the compound is selected from the group consisting of
21. A first device comprising a first organic light emitting device, the first organic light emitting device comprising:
an anode;
a cathode; and
an organic layer, disposed between the anode and the cathode, comprising a compound having the formula Os(L)n, wherein Os is Os(IV) metal, L is a ligand coordinating to Os, and n is an integer from 1 to 6;
wherein each L can be same or different;
wherein at least one L is a multidentate ligand; and
wherein the compound is neutral.
22.-32. (canceled)