1. A power supply apparatus, comprising:
a CPU having prescribed operation cycles including a shortest operation cycle;
a power supply;
a drive circuit for receiving supply of power from said power supply and driving a load circuit; and
an abnormal current detection circuit for detecting abnormality in a drive current flowing through said drive circuit;
said abnormal current detection circuit including
current detection means for detecting a maximum value of said drive current for each prescribed operation cycle, and
abnormality determination means for determining whether the maximum value of said drive current exceeds a prescribed threshold value for each said prescribed operation cycle, and determining presence of abnormality in said drive current when detecting that the maximum value of said drive current exceeds said prescribed threshold value in each of n (n is a natural number of at least 3) consecutive cycles of said prescribed operation cycles including a first operation cycle, wherein the first operation cycle is set to the shortest operation cycle of the CPU.
2. A power supply apparatus, comprising:
a CPU having prescribed operation cycles including a shortest operation cycle;
a power supply;
a drive circuit for receiving supply of power from said power supply and driving a load circuit; and
an abnormal current detection circuit for detecting abnormality in a drive current flowing through said drive circuit;
said abnormal current detection circuit including
current detection means for starting sampling of said drive current using a prescribed threshold value as a trigger and detecting a maximum value of said drive current for each prescribed operation cycle, and
abnormality determination means for determining whether the maximum value of said drive current exceeds said prescribed threshold value for each said prescribed operation cycle, and determining presence of abnormality in said drive current when detecting that the maximum value of said drive current exceeds said prescribed threshold value in each of n (n is a natural number of at least 3) consecutive cycles of said prescribed operation cycles including a first operation cycle, wherein the first operation cycle is set to the shortest operation cycle of the CPU.
3. The power supply apparatus according to claim 1, wherein
said load circuit includes an AC motor,
said abnormal current detection circuit further includes mode determination means for determining a control mode of said AC motor, and
said abnormality determination means adjusts said prescribed threshold value to a threshold value suitable for the determined control mode, determines whether the detected maximum value of said drive current exceeds said suitable threshold value for each said prescribed operation cycle, and determines presence of abnormality in said drive current when detecting that the maximum value of said drive current exceeds said suitable threshold value in each of said n consecutive prescribed operation cycles.
4. The power supply apparatus according to claim 3, wherein said mode determination means determines one of control modes having different carrier frequencies.
5. The power supply apparatus according to claim 4, wherein said abnormality determination means adjusts said threshold value in accordance with the carrier frequency of said determined control mode.
6. The power supply apparatus according to claim 1, further comprising rotation number detection means for detecting a motor rotation number of said AC motor based on a rotation angle of said AC motor, wherein
said abnormality determination means determines whether the maximum value of said drive current exceeds the prescribed threshold value for each said prescribed operation cycle and whether said motor rotation number is not greater than a prescribed rotation number, and determines presence of abnormality in said drive current when detecting that the maximum value of said drive current exceeds said prescribed threshold value in each of said n consecutive prescribed operation cycles and that said motor rotation number is not greater than said prescribed rotation number.
7. The power supply apparatus according to claim 6, wherein said prescribed rotation number is set smaller than a motor rotation number detected by said rotation number detection means during a normal operation of said power supply apparatus.
8. The power supply apparatus according to claim 1, further comprising a switch for electrically connectingdisconnecting said power supply tofrom said drive circuit by an openingclosing operation, wherein
said abnormal current detection circuit controls the openingclosing operation in such a manner that said power supply is electrically disconnected from said drive circuit upon detection of abnormality in said drive current.
9. The power supply apparatus according to claim 8, wherein said prescribed threshold value is set to a current level higher than said drive current flowing in said drive circuit when said power supply apparatus is in a normal operation.
10. The power supply apparatus according to claim 9, wherein a period corresponding to a total sum of said n consecutive prescribed operation cycles is set shorter than a time period causing breaking of said drive circuit when the drive current of a current level corresponding to said prescribed threshold value continuously flows in said drive circuit during the time period.
11. The power supply apparatus according to claim 10, wherein said n is set to 3.
12. The power supply apparatus according to claim 1, wherein
said abnormality determination means includes counting means,
said counting means increments a count value when it is determined that the maximum value of said drive current exceeds said prescribed threshold value and resets said count value when it is determined that the maximum value of said drive current does not exceed said prescribed threshold value in each said prescribed operation cycle, and
said abnormality determination means determines presence of abnormality in said drive current when detecting that said count value has reached a count value equal to said n.
13. The power supply apparatus according to claim 12, wherein said abnormality determination means adjusts said n in accordance with said prescribed threshold value.
14. The power supply apparatus according to claim 13, wherein said abnormality determination means adjusts said n to a smaller value as said prescribed threshold value becomes higher.
15. The power supply apparatus according to claim 12, wherein
said abnormal current detection circuit further includes temperature detection means for detecting a temperature of a circuit element of said drive circuit, and
said abnormality determination means adjusts said n in accordance with said detected temperature of the circuit element.
16. The power supply apparatus according to claim 15, wherein said abnormality determination means adjusts said n to a smaller value as said detected temperature of the circuit element becomes higher.
17. The power supply apparatus according to claim 1, wherein said prescribed operation cycle is longer than a shortest operation cycle of said abnormal current detection circuit.
18. The power supply apparatus according to claim 17, wherein said current detection means samples a drive current in said shortest operation cycle, and extracts and holds a maximum value of said drive current from among said sampled drive currents for each said prescribed operation cycle.
19. A power supply apparatus, comprising:
a CPU having prescribed operation cycles including a shortest operation cycle;
a power supply;
a drive circuit for receiving supply of power from said power supply and driving a load circuit; and
an abnormal current detection circuit for detecting abnormality in a drive current flowing through said drive circuit;
said abnormal current detection circuit including
a current detection unit for detecting a maximum value of said drive current for each prescribed operation cycle, and
an abnormality determination unit for determining whether the maximum value of said drive current exceeds a prescribed threshold value for each said prescribed operation cycle, and determining presence of abnormality in said drive current when detecting that the maximum value of said drive current exceeds said prescribed threshold value in each of n (n is a natural number of at least 3) consecutive cycles of said prescribed operation cycles including a first operation cycle, wherein the first operation cycle is set to the shortest operation cycle of the CPU.
20. A power supply apparatus, comprising:
a CPU having prescribed operation cycles including a shortest operation cycle;
a power supply;
a drive circuit for receiving supply of power from said power supply and driving a load circuit; and
an abnormal current detection circuit for detecting abnormality in a drive current flowing through said drive circuit;
said abnormal current detection circuit including
a current detection unit for starting sampling of said drive current using a prescribed threshold value as a trigger and detecting a maximum value of said drive current for each prescribed operation cycle, and
an abnormality determination unit for determining whether the maximum value of said drive current exceeds said prescribed threshold value for each said prescribed operation cycle, and determining presence of abnormality in said drive current when detecting that the maximum value of said drive current exceeds said prescribed threshold value in each of n (n is a natural number of at least 3) consecutive cycles of said prescribed operation cycles including a first operation cycle, wherein the first operation cycle is set to the shortest operation cycle of the CPU.
21. The power supply apparatus according to claim 19, wherein
said load circuit includes an AC motor,
said abnormal current detection circuit further includes a mode determination unit for determining a control mode of said AC motor, and
said abnormality determination unit adjusts said prescribed threshold value to a threshold value suitable for the determined control mode, determines whether the detected maximum value of said drive current exceeds said suitable threshold value for each said prescribed operation cycle, and determines presence of abnormality in said drive current when detecting that the maximum value of said drive current exceeds said suitable threshold value in each of said n consecutive prescribed operation cycles.
22. The power supply apparatus according to claim 21, wherein said mode determination unit determines one of control modes having different carrier frequencies.
23. The power supply apparatus according to claim 22, wherein said abnormality determination unit adjusts said threshold value in accordance with the carrier frequency of said determined control mode.
24. The power supply apparatus according to claim 19, further comprising rotation number detection means for detecting a motor rotation number of said AC motor based on a rotation angle of said AC motor, wherein
said abnormality determination unit determines whether the maximum value of said drive current exceeds the prescribed threshold value for each said prescribed operation cycle and whether said motor rotation number is not greater than a prescribed rotation number, and determines presence of abnormality in said drive current when detecting that the maximum value of said drive current exceeds said prescribed threshold value in each of said n consecutive prescribed operation cycles and that said motor rotation number is not greater than said prescribed rotation number.
25. The power supply apparatus according to claim 24, wherein said prescribed rotation number is set smaller than a motor rotation number detected by said rotation number detection means during a normal operation of said power supply apparatus.
26. The power supply apparatus according to claim 19, further comprising a switch for electrically connectingdisconnecting said power supply tofrom said drive circuit by an openingclosing operation, wherein
said abnormal current detection circuit controls the openingclosing operation in such a manner that said power supply is electrically disconnected from said drive circuit upon detection of abnormality in said drive current.
27. The power supply apparatus according to claim 26, wherein said prescribed threshold value is set to a current level higher than said drive current flowing in said drive circuit when said power supply apparatus is in a normal operation.
28. The power supply apparatus according to claim 27, wherein a period corresponding to a total sum of said n consecutive prescribed operation cycles is set shorter than a time period causing breaking of said drive circuit when the drive current of a current level corresponding to said prescribed threshold value continuously flows in said drive circuit during the time period.
29. The power supply apparatus according to claim 28, wherein said n is set to 3.
30. The power supply apparatus according to claim 19, wherein
said abnormality determination unit includes counting unit,
said counting unit increments a count value when it is determined that the maximum value of said drive current exceeds said prescribed threshold value and resets said count value when it is determined that the maximum value of said drive current does not exceed said prescribed threshold value in each said prescribed operation cycle, and
said abnormality determination unit determines presence of abnormality in said drive current when detecting that said count value has reached a count value equal to said n.
31. The power supply apparatus according to claim 30, wherein said abnormality determination unit adjusts said n in accordance with said prescribed threshold value.
32. The power supply apparatus according to claim 31, wherein said abnormality determination unit adjusts said n to a smaller value as said prescribed threshold value becomes higher.
33. The power supply apparatus according to claim 30, wherein
said abnormal current detection circuit further includes temperature detection means for detecting a temperature of a circuit element of said drive circuit, and
said abnormality determination unit adjusts said n in accordance with said detected temperature of the circuit element.
34. The power supply apparatus according to claim 33, wherein said abnormality determination unit adjusts said n to a smaller value as said detected temperature of the circuit element becomes higher.
35. The power supply apparatus according to claim 19, wherein said prescribed operation cycle is longer than a shortest operation cycle of said abnormal current detection circuit.
36. The power supply apparatus according to claim 35, wherein said current detection unit samples a drive current in said shortest operation cycle, and extracts and holds a maximum value of said drive current from among said sampled drive currents for each said prescribed operation cycle.
37. The power supply apparatus according to claim 1, further comprising an inverter used to generate a drive current from an AC motor.
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 method of manufacturing a light emission device comprising the steps of:
forming, on a first substrate, a first base having a light emission layer in between a first electrode layer and a second electrode layer, the first base being a synthetic resin;
forming, on a second substrate, a second base having a drive circuit for driving the light emission layer and a third electrode layer electrically connected to the drive circuit; and
connecting the second electrode layer with the third electrode layer by aligning the first base and the second base.
2. The method of manufacturing a light emission device according to claim 1, further comprising, after the step of connecting, the step of sealing at least in between the first base and the second base.
3. The method of manufacturing a light emission device according to claim 1, wherein the step of forming the first base includes the steps of:
forming the first electrode layer on the first substrate;
forming a plurality of banks on the first electrode layer;
forming the light emission layer in a concave portion formed by two of the banks and the first electrode layer as a bottom portion; and
forming the second electrode layer so as to contact the second electrode layer to at least the light emission layer.
4. The method of manufacturing a light emission device according to claim 3, wherein the first electrode layer is an anode layer being transparent, and wherein the second electrode layer is a cathode layer.
5. The method of manufacturing a light emission device according to claim 4, wherein the step of forming the light emission layer includes the steps of forming a hole injection layer on the anode layer and forming an organic EL layer on the hole injection layer.
6. The method of manufacturing a light emission device according to claim 1,
wherein the drive circuit includes a transistor,
wherein the transistor is formed through the steps of:
forming a semiconductor layer on a portion of the second substrate;
forming a gate insulation layer on the second substrate so as to cover the semiconductor layer;
forming a gate electrode on the gate insulation layer covering the semiconductor layer;
forming a source and a drain by doping impurities into the semiconductor layer on which the gate electrode is not formed;
forming a first passivation layer on the gate insulation layer so as to cover the gate electrode;
forming a first hole in the first passivation layer;
forming a wiring electrically connected to the source or the drain on the first hole and a portion of the first passivation layer;
forming a second passivation layer on the first passivation layer so as to cover the wiring;
forming a second hole in the second passivation layer; and
forming a third electrode layer electrically connected to the wiring on the second hole and the second passivation layer.
7. The method of manufacturing a light emission device according to claim 2, wherein, in the step of sealing, oxidization prevention material is fill up in between the first base and the second base.
8. The method of manufacturing a light emission device according to claim 7, wherein the oxidation prevention material includes photo-curing resin.
9. The method of manufacturing a light emission device according to claim 2, wherein, in the step of sealing, an inert gas is sealed in between the first base and the second base.
10. The method of manufacturing a light emission device according to claim 1, wherein an electrically conductive adhesive layer is applied to the second electrode layer.
11. The method of manufacturing a light emission device according to claim 1, wherein an electrically conductive adhesive is applied to the third electrode layer.
12. The method of manufacturing a light emission device according to claim 3, the second electrode layer is formed on the two banks, on which the light emission layer is formed, and the light emission layer so as to fully cover the light emission layer.