1. A production method for producing an article, comprising the step of rotating a rotating member so as to machine a semi-finished product with a machining section included in the rotating member, wherein a circumferential velocity of the rotating member is changed according to a size of the semi-finished product during one cycle in which the semi-finished product is machined.
2. A production method for producing an article according to claim 1, wherein the size of the semi-finished product is a length of the semi-finished product in a flow direction.
3. A production method for producing an article according to claim 1, wherein the size of the semi-finished product is determined as a distance between boundaries between the semi-finished products.
4. A production method for producing an article according to claim 1, wherein the circumferential velocity of the rotating member in a working area is set to be equal to or greater than a velocity that is approximate to a flow velocity of the semi-finished product of a first size.
5. A production method for producing an article according to claim 1, wherein:
in a case where a semi-finished product of a first size is machined by the rotating member, an average circumferential velocity of the rotating member in a working area is generally the same as an average circumferential velocity of the rotating member in a non-working area; and
in a case where a length of a semi-finished product of a second size in a flow direction is less than that of the semi-finished product of the first size, the average circumferential velocity of the rotating member in the non-working area is higher than a flow velocity of the semi-finished product of the second size.
6. A production method for producing an article according to claim 1, wherein:
in a case where a semi-finished product of a first size is machined by the rotating member, an average circumferential velocity of the rotating member in a working area is generally the same as an average circumferential velocity of the rotating member in a non-working area; and
in a case where the length of the semi-finished product of a second size in the flow direction is greater than that of the semi-finished product of the first size, the average circumferential velocity is lower than the flow velocity.
7. A production method for producing an article according to claim 1, further comprising:
a hole making step of cutting off an area of a web that is to be a leg hole;
a preparation step of preparing an absorbent;
a placement step of placing the absorbent on the web; and
a cutting step of cutting the web on which the absorbent has been placed, wherein:
in the hole making step, a cutter, which is the machining section of the rotating member, cuts off the area in a working area by rotating the rotating member; and
an average circumferential velocity of the rotating member in the working area is different from an average circumferential velocity of the rotating member in a non-working area.
8. A production method for producing an article according to claim 7, further comprising an interval changing step of changing an interval between the absorbents by rotating another rotating member for transferring the absorbents while changing a circumferential velocity thereof according to the size of the absorbents before the prepared absorbents are placed on the web.
9. A production method for producing an article according to claim 8, further comprising:
a detection step of detecting a velocity signal containing velocity information regarding a velocity of the semi-finished product;
a production step of producing an interval signal in response to a specified portion of the semi-finished product passing through a predetermined point;
a calculation step of calculating an expansioncontraction of the semi-finished product based on a velocity signal that is measured between the interval signals and a reference that is issued between the interval signals; and
a step of correcting at least one of a circumferential velocity of the other rotating member and a phase thereof based on the expansioncontraction.
10. A production method for producing an article according to claim 8, further comprising the step of correcting at least one of a circumferential velocity of the other rotating member and a phase thereof based on the expansioncontraction of the semi-finished product.
11. A production method for producing an article according to claim 7, further comprising the step of placing an elastic member on the web by rotating another rotating member for reciprocating a guide section for guiding the elastic member while changing a circumferential velocity thereof according to the size of the semi-finished product.
12. A production method for producing an article according to claim 11, further comprising the step of correcting at least one of a circumferential velocity of the other rotating member and a phase thereof based on the expansioncontraction of the semi-finished product.
13. A production method for producing an article according to claim 11, further comprising:
a detection step of detecting a velocity signal containing velocity information regarding a velocity of the semi-finished product;
a production step of producing an interval signal in response to a specified portion of the semi-finished product passing through a predetermined point;
a calculation step of calculating an expansioncontraction of the semi-finished product based on a velocity signal that is measured between the interval signals and a reference that is issued between the interval signals; and
a step of correcting at least one of a circumferential velocity of the other rotating member and a phase thereof based on the expansioncontraction.
14. A production method for producing an article according to claim 1, further comprising:
a hole making step of cutting off an area of a web that is to be a leg hole;
a preparation step of preparing an absorbent;
a placement step of placing the absorbent on the web; and
a cutting step of cutting the web on which the absorbent has been placed, wherein:
in the preparation step, a cutter, which is the machining section of the rotating member, cuts a continuous absorbent sheet in a working area by rotating the rotating member, thereby preparing the absorbent; and
an average circumferential velocity of the rotating member in the working area is different from an average circumferential velocity of the rotating member in a non-working area.
15. A production method for producing an article according to claim 14, further comprising the step of placing an elastic member on the web by rotating another rotating member for reciprocating a guide section for guiding the elastic member while changing a circumferential velocity thereof according to the size of the semi-finished product.
16. A production method for producing an article according to claim 14, further comprising the step of correcting a time at which the machining section reaches the working area based on an expansioncontraction of the semi-finished product.
17. A production method for producing an article according to claim 14, further comprising the step of correcting a position at which the semi-finished product is machined based on an expansioncontraction of the semi-finished product.
18. A production method for producing an article according to claim 14, further comprising the step of correcting a circumferential velocity of the machining section in a working area based on an expansioncontraction of the semi-finished product.
19. A production method for producing an article according to claim 14, further comprising an interval changing step of changing an interval between the absorbents by rotating another rotating member for transferring the absorbents while changing a circumferential velocity thereof according to the size of the absorbents before the prepared absorbents are placed on the web.
20. A production method for producing an article according to claim 1, further comprising:
a hole making step of cutting off an area of a web that is to be a leg hole;
a preparation step of preparing an absorbent;
a placement step of placing the absorbent on the web; and
a cutting step of cutting the web on which the absorbent has been placed, wherein:
in the cutting step, a cutter, which is the machining section of the rotating member, cuts the web in a working area by rotating the rotating member; and
an average circumferential velocity of the rotating member in the working area is different from an average circumferential velocity of the rotating member in a non-working area.
21. A production method for producing an article according to claim 20, further comprising an interval changing step of changing an interval between the absorbents by rotating another rotating member for transferring the absorbents while changing a circumferential velocity thereof according to the size of the absorbents before the prepared absorbents are placed on the web.
22. A production method for producing an article according to claim 20, further comprising the step of placing an elastic member on the web by rotating another rotating member for reciprocating a guide section for guiding the elastic member while changing a circumferential velocity thereof according to the size of the semi-finished product.
23. A production method for producing an article according to claim 20, further comprising the step of correcting a time at which the machining section reaches the working area based on an expansioncontraction of the semi-finished product.
24. A production method for producing an article according to claim 20, further comprising the step of correcting a position at which the semi-finished product is machined based on an expansioncontraction of the semi-finished product.
25. A production method for producing an article according to claim 20, further comprising the step of correcting a circumferential velocity of the machining section in a working area based on an expansioncontraction of the semi-finished product.
26. A production method for producing an article according to claim 1, further comprising:
a preparation step of preparing an absorbent;
a placement step of placing the absorbent on a web;
a hole making step of cutting off an area of the web that is to be a leg hole; and
a cutting step of cutting the web on which the absorbent has been placed, wherein:
in the hole making step, a cutter, which is the machining section of the rotating member, cuts off the area in a working area by rotating the rotating member; and
an average circumferential velocity of the rotating member in the working area is different from an average circumferential velocity of the rotating member in a non-working area.
27. A production method for producing an article according to claim 26, further comprising an interval changing step of changing an interval between the absorbents by rotating another rotating member for transferring the absorbents while changing a circumferential velocity thereof according to the size of the absorbents before the prepared absorbents are placed on the web.
28. A production method for producing an article according to claim 26, further comprising the step of placing an elastic member on the web by rotating another rotating member for reciprocating a guide section for guiding the elastic member while changing a circumferential velocity thereof according to the size of the semi-finished product.
29. A production method for producing an article according to claim 26, further comprising the step of correcting a time at which the machining section reaches the working area based on an expansioncontraction of the semi-finished product.
30. A production method for producing an article according to claim 26, further comprising the step of correcting a position at which the semi-finished product is machined based on an expansioncontraction of the semi-finished product.
31. A production method for producing an article according to claim 26, further comprising the step of correcting a circumferential velocity of the machining section in a working area based on an expansioncontraction of the semi-finished product.
32. A production method for producing an article according to claim 1, further comprising:
a preparation step of preparing an absorbent;
a placement step of placing the absorbent on a web;
a hole making step of cutting off an area of the web that is to be a leg hole; and
a cutting step of cutting the web on which the absorbent has been placed, wherein:
in the preparation step, a cutter, which is the machining section of the rotating member, cuts a continuous absorbent sheet in a working area by rotating the rotating member, thereby preparing the absorbent; and
an average circumferential velocity of the rotating member in the working area is different from an average circumferential velocity of the rotating member in a non-working area.
33. A production method for producing an article according to claim 32, further comprising an interval changing step of changing an interval between the absorbents by rotating another rotating member for transferring the absorbents while changing a circumferential velocity thereof according to the size of the absorbents before the prepared absorbents are placed on the web.
34. A production method for producing an article according to claim 32, further comprising the step of placing an elastic member on the web by rotating another rotating member for reciprocating a guide section for guiding the elastic member while changing a circumferential velocity thereof according to the size of the semi-finished product.
35. A production method for producing an article according to claim 32, further comprising the step of correcting a time at which the machining section reaches the working area based on an expansioncontraction of the semi-finished product.
36. A production method for producing an article according to claim 32, further comprising the step of correcting a position at which the semi-finished product is machined based on an expansioncontraction of the semi-finished product.
37. A production method for producing an article according to claim 32, further comprising the step of correcting a circumferential velocity of the machining section in a working area based on an expansioncontraction of the semi-finished product.
38. A production method for producing an article according to claim 1, further comprising:
a preparation step of preparing an absorbent;
a placement step of placing the absorbent on a web;
a hole making step of cutting off an area of the web that is to be a leg hole; and
a cutting step of cutting the web on which the absorbent has been placed, wherein:
in the cutting step, a cutter, which is the machining section of the rotating member, cuts the web in a working area by rotating the rotating member; and
an average circumferential velocity of the rotating member in the working area is different from an average circumferential velocity of the rotating member in a non-working area.
39. A production method for producing an article according to claim 38, further comprising an interval changing step of changing an interval between the absorbents by rotating another rotating member for transferring the absorbents while changing a circumferential velocity thereof according to the size of the absorbents before the prepared absorbents are placed on the web.
40. A production method for producing an article according to claim 38, further comprising the step of placing an elastic member on the web by rotating another rotating member for reciprocating a guide section for guiding the elastic member while changing a circumferential velocity thereof according to the size of the semi-finished product.
41. A production method for producing an article according to claim 38, further comprising the step of correcting a time at which the machining section reaches the working area based on an expansioncontraction of the semi-finished product.
42. A production method for producing an article according to claim 38, further comprising the step of correcting a position at which the semi-finished product is machined based on an expansioncontraction of the semi-finished product.
43. A production method for producing an article according to claim 38, further comprising the step of correcting a circumferential velocity of the machining section in a working area based on an expansioncontraction of the semi-finished product.
44. A production method for producing an article according to claim 1, further comprising the step of handing over the semi-finished products while changing an interval between the semi-finished products by rotating another rotating member for transferring received semi-finished products while changing a circumferential velocity thereof according to the size of the semi-finished products.
45. A production method for producing an article according to claim 44, further comprising the step of correcting at least one of a circumferential velocity of the other rotating member and a phase thereof based on the expansioncontraction of the semi-finished product.
46. A production method for producing an article according to claim 44, further comprising:
a detection step of detecting a velocity signal containing velocity information regarding a velocity of the semi-finished product;
a production step of producing an interval signal in response to a specified portion of the semi-finished product passing through a predetermined point;
a calculation step of calculating an expansioncontraction of the semi-finished product based on a velocity signal that is measured between the interval signals and a reference that is issued between the interval signals; and
a step of correcting at least one of a circumferential velocity of the other rotating member and a phase thereof based on the expansioncontraction.
47. A production method for producing an article according to claim 1, further comprising the step of correcting a time at which the machining section reaches the working area based on an expansioncontraction of the semi-finished product.
48. A production method for producing an article according to claim 1, further comprising:
a detection step of detecting a velocity signal containing velocity information regarding a velocity of the semi-finished product;
a production step of producing an interval signal in response to a specified portion of the semi-finished product passing through a predetermined point;
a step of producing a timing signal when a predetermined number of velocity signals are counted after issuance of the interval signal; and
a step of correcting a position at which the semi-finished product is machined based on the timing signal.
49. A production method for producing an article according to claim 1, further comprising:
a detection step of detecting a velocity signal containing velocity information regarding a velocity of the semi-finished product;
a production step of producing an interval signal in response to a specified portion of the semi-finished product passing through a predetermined point;
a step of producing a timing signal when a predetermined amount of time passes after issuance of the interval signal; and
a step of correcting a position at which the semi-finished product is machined based on the timing signal.
50. A production method for producing an article according to claim 1, further comprising the step of correcting a position at which the semi-finished product is machined based on an expansioncontraction of the semi-finished product.
51. A production method for producing an article according to claim 1, further comprising:
a detection step of detecting a velocity signal containing velocity information regarding a velocity of the semi-finished product;
a production step of producing an interval signal in response to a specified portion of the semi-finished product passing through a predetermined point;
a calculation step of calculating an expansioncontraction of the semi-finished product based on the number of pulses of a velocity signal that is measured between the interval signals and the number of pulses of a reference velocity signal that is issued between the interval signals;
a step of correcting a predetermined number based on the expansioncontraction;
a step of producing a timing signal when the corrected predetermined number of velocity signals are counted after issuance of the interval signal; and
a step of correcting a position at which the semi-finished product is machined based on the timing signal.
52. A production method for producing an article according to claim 1, further comprising:
a detection step of detecting a velocity signal containing velocity information regarding a velocity of the semi-finished product;
a production step of producing an interval signal in response to a specified portion of the semi-finished product passing through a predetermined point;
a calculation step of calculating an expansioncontraction of the semi-finished product based on the number of pulses of a velocity signal that is measured between the interval signals and the number of pulses of a reference velocity signal that is issued between the interval signals;
a step of correcting a predetermined amount of time based on the expansioncontraction;
a step of producing a timing signal when the corrected predetermined amount of time passes after issuance of the interval signal; and
a step of correcting a position at which the semi-finished product is machined based on the timing signal.
53. A production method for producing an article according to claim 1, further comprising the step of correcting a circumferential velocity of the machining section in a working area based on an expansioncontraction of the semi-finished product.
54. A production method for producing an article according to claim 1, further comprising:
a detection step of detecting a velocity signal containing velocity information regarding a velocity of the semi-finished product;
a production step of producing an interval signal in response to a specified portion of the semi-finished product passing through a predetermined point;
a calculation step of calculating an expansioncontraction of the semi-finished product based on the number of velocity signals that are measured between the interval signals and the number of reference velocity signals that are issued between the interval signals; and
a step of correcting a circumferential velocity of the machining section in a working area based on the expansioncontraction.
55. A production method for producing an article according to claim 1, further comprising the steps of:
cutting a member by a cutter roll into pieces of a predetermined length;
transferring the cut members by a transfer section of the transfer roll;
attaching the cut members on a web at a first interval by the transfer roll and a protrusion of a press roll, wherein:
the press roll rotates as the rotating member, and the protrusion attaches the members on the web; and
an average circumferential velocity of the transfer roll in a working area is different from that in a non-working area.
56. A production method for producing an article according to claim 55, further comprising the step of correcting at least one of a circumferential velocity of the press roll and a phase thereof in the working area based on an expansioncontraction of the web.
57. A production method for producing an article, comprising the step of rotating a rotating member so as to machine a semi-finished product with a machining section included in the rotating member and the step of correcting at least one of a phase of the rotating member and a circumferential velocity thereof in a working area based on an expansioncontraction of the semi-finished product.
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. An organic electroluminescent device comprising:
a hole injecting electrode;
an electron injecting electrode; and
a light emitting layer provided between said hole injecting electrode and said electron injecting electrode,
said light emitting layer containing a rubrene derivative having a molecular structure represented by Formula (1):
wherein R11-R15, R21-R25, R31-R35 and R41-R45 are the same or different and each represent a hydrogen atom or a substituent, where the structure in which all are hydrogen atoms is excluded, and adjacent two of R11-R15, adjacent two of R21-R25, adjacent two of R31-R35, and adjacent two of R41-R45 may be bonded together to form rings, and adjacent three of R11-R15, adjacent three of R21-R25, adjacent three of R31-R35, and adjacent three of R41-R45 may be bonded together to form rings.
2. An organic electroluminescent device comprising:
a hole injecting electrode;
an electron injecting electrode; and
a light emitting layer provided between said hole injecting electrode and said electron injecting electrode,
said light emitting layer containing a rubrene derivative having a molecular structure represented by Formula (2):
wherein R 11-R15 and R21-R25 are the same or different and each represent a hydrogen atom or a substituent, adjacent two of R 11-R15 and adjacent two of R21-R25 may be bonded together to form rings, and adjacent three of R11-R15 and adjacent three of R21-R25 may be bonded together to form rings.
3. An organic electroluminescent device comprising:
a hole injecting electrode;
an electron injecting electrode; and
a light emitting layer provided between said hole injecting electrode and said electron injecting electrode,
said light emitting layer containing a rubrene derivative having a molecular structure represented by Formula (3):
wherein Ar1-Ar6 are the same or different and each represent a hydrogen atom or a substituent, R1 and R2 are the same or different and each represent a hydrogen atom or a substituent, and adjacent R1 and R2 may be bonded together to form a ring.
4. An organic electroluminescent device comprising:
a hole injecting electrode;
an electron injecting electrode; and
a light emitting layer provided between said hole injecting electrode and said electron injecting electrode,
said light emitting layer containing a rubrene derivative having a molecular structure represented by Formula (4):
wherein Ar1-Ar10 are the same or different and each represent a hydrogen atom or a substituent.
5. The organic electroluminescent device according to claim 1, wherein said rubrene derivative is 5,6,11,12-tetrakis(naphth-2-yl)-naphthacene having a molecular structure represented by Formula (A1).
6. The organic electroluminescent device according to claim 1, wherein said rubrene derivative is 5,12-bis(4-(6-methylbenzothiazole-2-yl)phenyl)-6,11-diphenylnaphthacene represented by Formula (A2).
7. The organic electroluminescent device according to claim 1, wherein said rubrene derivative is 5,6,11,12-tetrakis(4-tert-butylphenyl)-naphthacene represented by
8. The organic electroluminescent device according to claim 2, wherein said rubrene derivative is 5,12-bis(4-tert-butylphenyl)-naphthacene represented by Formula (A4).
9. The organic electroluminescent device according to claim 2, wherein said rubrene derivative is 5,12-diphenylnaphthacene represented by Formula (A5).
10. The organic electroluminescent device according to claim 2, wherein said rubrene derivative is 5,12-bis(naphth-2-yl)-naphthacene represented by Formula (A6).
11. The organic electroluminescent device according to claim 2, wherein said rubrene derivative is 5,12-bis(pyrene-1-yl)-naphthacene represented by Formula (A7).
12. The organic electroluminescent device according to claim 3, wherein said rubrene derivative is 5,6,13,14-6-tetrakisphenyl-pentacene represented by Formula (A8).
13. The organic electroluminescent device according to claim 3, wherein said rubrene derivative is 6,13-bis(4-(6-methylbenzothiazole-2-yl)phenyl)-pentacene represented by Formula (A9).
14. The organic electroluminescent device according to claim 4, wherein said rubrene derivative is 5,6,11,12-tetrakisphenyl-1,2-benzo-(3,4-benzo-)naphthacene represented by Formula (A10).
15. The organic electroluminescent device according to claim 1, wherein said light emitting layer contains a host material, a light emitting dopant, and a first light-emission assisting dopant, and said first light-emission assisting dopant is composed of said rubrene derivative.
16. The organic electroluminescent device according to claim 15, wherein said light emitting layer further contains a second light-emission assisting dopant.
17. The organic electroluminescent device according to claim 1, wherein said light emitting layer contains a host material and a light emitting dopant, and said light emitting dopant is composed of said rubrene derivative.
18. The organic electroluminescent device according to claim 15, wherein the content of said light emitting dopant is not less than 0.1 percent by weight nor more than 50 percent by weight, with respect to said host material.
19. An organic electroluminescent device comprising:
a hole injecting electrode;
an electron injecting electrode; and
a light emitting layer provided between said hole injecting electrode and said electron injecting electrode,
said light emitting layer comprising,
a first light emitting layer that contains a compound having a molecular structure represented by Formula (C1), and
a second light emitting layer that contains a luminescent material that emits blue light.
20. An organic electroluminescent device comprising:
a hole injecting electrode;
an electron injecting electrode; and
a light emitting layer provided between said hole injecting electrode and said electron injecting electrode,
said light emitting layer comprising,
a first light emitting layer that contains a compound having a molecular structure represented by Formula (C2), and
a second light emitting layer that contains a luminescent material that emits blue light.
21. An organic electroluminescent device comprising:
a hole injecting electrode;
an electron injecting electrode; and
a light emitting layer provided between said hole injecting electrode and said electron injecting electrode,
said light emitting layer comprising,
a first light emitting layer that contains a compound having a molecular structure represented by Formula (C3), and
a second light emitting layer that contains a luminescent material that emits blue light.
22. An organic electroluminescent device comprising:
a hole injecting electrode;
an electron injecting electrode; and
a light emitting layer provided between said hole injecting electrode and said electron injecting electrode,
said light emitting layer comprising,
a first light emitting layer that contains a compound having a molecular structure represented by Formula (C4), and
a second light emitting layer that contains a luminescent material that emits blue light.
23. An organic electroluminescent device comprising:
a hole injecting electrode;
an electron injecting electrode; and
a light emitting layer provided between said hole injecting electrode and said electron injecting electrode,
said light emitting layer comprising,
a first light emitting layer that contains a compound having a molecular structure represented by Formula (C5), and
a second light emitting layer that contains a luminescent material that emits blue light.
24. An organic electroluminescent device comprising:
a hole injecting electrode;
an electron injecting electrode; and
a light emitting layer provided between said hole injecting electrode and said electron injecting electrode,
said light emitting layer comprising,
a first light emitting layer that contains a compound having a molecular structure represented by Formula (C6), and
a second light emitting layer that contains a luminescent material that emits blue light.
25. An organic electroluminescent device comprising:
a hole injecting electrode;
an electron injecting electrode; and
a light emitting layer provided between said hole injecting electrode and said electron injecting electrode,
said light emitting layer comprising,
a first light emitting layer that contains a compound having a molecular structure represented by Formula (C7), and
a second light emitting layer that contains a luminescent material that emits blue light.
26. An organic electroluminescent device comprising:
a hole injecting electrode;
an electron injecting electrode; and
a light emitting layer provided between said hole injecting electrode and said electron injecting electrode,
said light emitting layer comprising,
a first light emitting layer that contains a compound having a molecular structure represented by Formula (C8), and
a second light emitting layer that contains a luminescent material that emits blue light.
27. An organic electroluminescent device comprising:
a hole injecting electrode;
an electron injecting electrode; and
a light emitting layer provided between said hole injecting electrode and said electron injecting electrode,
said light emitting layer comprising,
a first light emitting layer that contains a compound having a molecular structure represented by Formula (C9), and
a second light emitting layer that contains a luminescent material that emits blue light.
28. An organic electroluminescent device comprising:
a hole injecting electrode;
an electron injecting electrode; and
a light emitting layer provided between said hole injecting electrode and said electron injecting electrode,
said light emitting layer comprising,
a first light emitting layer that contains a compound having a molecular structure represented by Formula (C10), and
a second light emitting layer that contains a luminescent material that emits blue light.
29. An organic electroluminescent device comprising:
a hole injecting electrode;
an electron injecting electrode; and
a light emitting layer provided between said hole injecting electrode and said electron injecting electrode,
said light emitting layer comprising,
a first light emitting layer that contains a compound having a molecular structure represented by Formula (C11), and
a second light emitting layer that contains a luminescent material that emits blue light.
30. An organic electroluminescent device comprising:
a hole injecting electrode;
an electron injecting electrode; and
a light emitting layer provided between said hole injecting electrode and said electron injecting electrode,
said light emitting layer comprising,
a first light emitting layer that contains a compound having a molecular structure represented by Formula (C12), and
a second light emitting layer that contains a luminescent material that emits blue light.
31. An organic electroluminescent device comprising:
a hole injecting electrode;
an electron injecting electrode; and
a light emitting layer provided between said hole injecting electrode and said electron injecting electrode,
said light emitting layer comprising,
a first light emitting layer that contains a compound having a molecular structure represented by Formula (C13), and
a second light emitting layer that contains a luminescent material that emits blue light.
32. An organic electroluminescent device comprising:
a hole injecting electrode;
an electron injecting electrode; and
a light emitting layer provided between said hole injecting electrode and said electron injecting electrode,
said light emitting layer comprising,
a first light emitting layer that contains a compound having a molecular structure represented by Formula (C14), and
a second light emitting layer that contains a luminescent material that emits blue light.
33. An organic electroluminescent device comprising:
a hole injecting electrode;
an electron injecting electrode; and
a light emitting layer provided between said hole injecting electrode and said electron injecting electrode,
said light emitting layer comprising,
a first light emitting layer that contains a compound having a molecular structure represented by Formula (C15), and
a second light emitting layer that contains a luminescent material that emits blue light.
34. An organic electroluminescent device comprising:
a hole injecting electrode;
an electron injecting electrode; and
a light emitting layer provided between said hole injecting electrode and said electron injecting electrode,
said light emitting layer comprising,
a first light emitting layer that contains a compound having a molecular structure represented by Formula (C16), and
a second light emitting layer that contains a luminescent material that emits blue light.
35. An organic electroluminescent device comprising:
a hole injecting electrode;
an electron injecting electrode; and
a light emitting layer provided between said hole injecting electrode and said electron injecting electrode,
said light emitting layer comprising,
a first light emitting layer that contains a compound having a molecular structure represented by Formula (C17), and
a second light emitting layer that contains a luminescent material that emits blue light.
36. An organic electroluminescent device comprising:
a hole injecting electrode;
an electron injecting electrode; and
a light emitting layer provided between said hole injecting electrode and said electron injecting electrode,
said light emitting layer comprising,
a first light emitting layer that contains a compound having a molecular structure represented by Formula (C18), and
a second light emitting layer that contains a luminescent material that emits blue light.
37. An organic electroluminescent device comprising:
a hole injecting electrode;
an electron injecting electrode; and
a light emitting layer provided between said hole injecting electrode and said electron injecting electrode,
said light emitting layer comprising,
a first light emitting layer that contains a compound having a molecular structure represented by Formula (C19), and
a second light emitting layer that contains a luminescent material that emits blue light.
38. An organic electroluminescent device comprising:
a hole injecting electrode;
an electron injecting electrode; and
a light emitting layer provided between said hole injecting electrode and said electron injecting electrode,
said light emitting layer comprising,
a first light emitting layer that contains a compound having a molecular structure represented by Formula (C20), and
a second light emitting layer that contains a luminescent material that emits blue light.
39. An organic electroluminescent device comprising:
a hole injecting electrode;
an electron injecting electrode; and
a light emitting layer provided between said hole injecting electrode and said electron injecting electrode,
said light emitting layer comprising a first light emitting layer that contains at least one compound selected from the group consisting of compounds having molecular structures represented by Formulas (C1)-(C20) and at least one compound selected from the group consisting of compounds represented by Formulas (A4)-(A7), (A10), and (C21)-(C27), and a second light emitting layer that contains a luminescent material that emits blue light.
40. A luminescent material having a molecular structure represented by Formula (1):
wherein R11-R15, R21-R25, R31-R35 and R41-R45 are the same or different and each represent a hydrogen atom or a substituent, where the structure in which all are hydrogen atoms is excluded, and adjacent two of R11-R15, adjacent two of R21-R25, adjacent two of R31-R35, and adjacent two of R41-R45 may be bonded together to form rings, and adjacent three of R11-R15, adjacent three of R21-R25, adjacent three of R31-R35, and adjacent three of R41-R45 may be bonded together to form rings.
41. A luminescent material having a molecular structure represented by Formula (2):
wherein R11-R15 and R21-R25 are the same or different and each represent a hydrogen atom or a substituent, adjacent two of R11-R15 and adjacent two of R21-R25 may be bonded together to form rings, and adjacent three of R11-R15 and adjacent three of R21-R25 may be bonded together to form rings.
42. A luminescent material having a molecular structure represented by Formula (3):
wherein Ar1-Ar6 are the same or different and each represent a hydrogen atom or a substituent, and R1 and R2 are the same or different and each represent a hydrogen atom or a substituent, and adjacent R1 and R2 may be bonded together to form a ring.
43. A luminescent material having a molecular structure represented by Formula (4):
wherein Ar1-Ar10 are the same or different and each represent a hydrogen atom or a substituent.