Abstract:
PROBLEM TO BE SOLVED: To provide a discharge lamp driving device which can obviate shock hazards. SOLUTION: Each of discharge lamps 41-4n is aligned with one another, to one side of an electrode, a first alternating voltage V1 output from an inverter circuit 11 is supplied, and to the other of the electrode, a second alternating voltage V2 output from the inverter circuit 11 is supplied. A signal processor 30 compares a first voltage signal Va with a second voltage signal Vb, and if the difference of the magnitudes is above a predetermined value, generates a current limiting signal S1. The current limiting signal S1 is supplied to the inverter circuit 11. COPYRIGHT: (C)2006,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide a discharge lamp driving device capable of surely detecting whether a discharge lamp is in an open condition or not, in a method whereby a plurality of discharge lamps are driven from both sides by making them parallel connected, and a liquid crystal display. SOLUTION: A group of discharge lamps 41 are driven from both sides by AC voltages generated in first and second transformers T11, T12. First and second current detecting circuits 311, 321 generate first and second current detecting signals S1, S2 by detecting currents flowing in the output windings L12, L22 of the first and second transformers. A group of discharge lamps 42 are driven from both sides by AC voltages generated in the output windings L32, L42 of third and fourth transformers T12, T22. Third and fourth current detecting circuits 312, 322 generate third and fourth current detecting signals S3, S4 by detecting currents flowing in the output windings L32, L42 of the third and fourth transformers. A signal processing part 30 generates a signal S0 to detect the open condition of the discharge lamp, when differences in the sizes of the first-fourth current detecting signals S1-S4 are not less than prescribed values. COPYRIGHT: (C)2006,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide an electronic component that facilitates operation for fixing wire solder to a terminal electrode and is optionally adjustable in solder amount. SOLUTION: The wire solder 20 is provided at a part near an extension end of a second side wall 13B. The wire solder 20 is wound spirally three or more times in a peripheral direction of the part near the extension part of the second side wall 13B, and faces a mounting surface 13C and an external surface 13D respectively. A part of the mounting surface 13C for the wire solder 20 other than right and left end edges and the part of the wire solder 20 facing the part of the mounting surface 13C are apart from each other. A melting point of the wire solder 20 and a melting point of cream solder 2C are substantially equal to each other. Further, a flux content of the wire solder 20 is smaller than a flux content of the cream solder 2C. COPYRIGHT: (C)2011,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a coil component which includes winding fixed on a both-sided adhesive tape to be stably positioned, a transformer, and a method of manufacturing the coil component. SOLUTION: On primary winding 51 wound around a substantially cylindrical part 21, an insulating tape 22 is provided covering the primary winding 51. On the insulating tape 22, the belt-like both-sided adhesive tape 24 having a prescribed width is provided while directly stuck on the insulating tape 22. A winding part 52A of secondary winding 52 is wound directly on the insulating tape 22 to be substantially orthogonal to the axial direction of the substantially cylindrical part 21. A bent lead part 52B comprises a part from one end 52AA of the winding part 52A to one end of the secondary winding 52 sliced to a terminal metal fitting 42, and a part 52BA which is a part of the bent lead part 52B and connected to the winding part 52A is sunk on the both-sided adhesive tape 24 in the thickness direction of the both-sided adhesive tape 24. COPYRIGHT: (C)2011,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a coil component capable of connecting a lead part and a terminal while surely securing an insulation distance.SOLUTION: The coil component includes: a bobbin (40) including a first hollow cylindrical part (44) having a primary coil (20) wound around its outer periphery, and a bobbin substrate (42) in which a primary terminal to be connected to the primary coil and a secondary terminal (72) to be connected to a secondary coil are installed and which is connected to a lower end of the first hollow cylindrical part; and a case (50) including a second hollow cylindrical part (54) which can be attached to the outer periphery of the primary coil and has the secondary coil wound around its outer periphery, a lower flange part (58) connected to a lower end of the second hollow cylindrical part so as to be attached to an upper surface of the bobbin substrate, and an upper flange part (52) connected to an upper end of the second hollow cylindrical part. At least one lead part (32a) of the secondary coil is connected to the secondary terminal after being pulled up from the second hollow cylindrical part to the upper flange part.
Abstract:
PROBLEM TO BE SOLVED: To provide a mounting method of electronic components in which poor mounting can be minimized as much as possible.SOLUTION: In a pressure holding step, four hooks 52F, 52G, 52O and 52P of a coil component 1 are pushed into respective through holes by pressing the ribs 53A and 53B of a bobbin 50 of the coil component 1 in the direction of Z-axis by using a pressing jig (not shown). Claws 52H, 52I, 52Q and 52R of the hooks 52F, 52G, 52O and 52P are then projected to the rear face of a mounting substrate by further pressing. Subsequently, the pressing jig is moved in the direction of Z-axis and separated from the bobbin 50. Consequently, the claws 52H, 52I, 52Q and 52R are caught in the rear face of the mounting substrate and latched reliably.
Abstract:
PROBLEM TO BE SOLVED: To provide a discharge lamp driving device and a liquid crystal display device wherein detection can be made that the discharge lamp is in open state in a both-side driving method. SOLUTION: As for first voltage detecting elements Cc1 to Ccn, Ce1 to Cen, one end is connected to at least one side among first and second discharge lamp connecting elements P11 to P1n, P21 to P2n. As for second voltage detecting elements Cd1 to Cdn, Cf1 to Cfn, one end is connected to the other end of the first voltage detecting elements Cc1 to Ccn, Ce1 to Cen, and the other end is led to a grounding terminal. A signal processing part 30 forms a signal SO which detects open states of discharge lamps 21 to 2n from voltages V31 to V3n, and V41 to V4n formed at connection points of the first voltage detecting elements Cc1 to Ccn, Ce1 to Cen, and the second voltage detecting elements Cd1 to Cdn, and Cf1 to Cfn. COPYRIGHT: (C)2006,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide a coil component which allows user to easily obtain desired leakage properties and can be readily assembled with little variation in the properties.SOLUTION: A coil component 10 comprises: a first bobbin 40 having a first bobbin substrate 42 provided with a first hollow cylinder part 44 which is wound by a primary coil 20 on its outer periphery; and a second bobbin 50 attached to the first bobbin 40 and having a second bobbin substrate 52 provided with a second hollow cylinder part 54 which is wound by a secondary coil 30 on its outer periphery. A winding center C1 of the primary coil 20 and a winding center C2 of the secondary coil 30 are displaced from each other in a predetermined reference direction X by a predetermined deviation amount (Lx).
Abstract:
PROBLEM TO BE SOLVED: To provide a transformer which meets the safety standard, has strong magnetic coupling between a primary winding and a secondary winding, and is reduced in size and height. SOLUTION: A first primary winding 51 is wound around a first section 21A so as not to protrude vertically and horizontally from partitioning plates 22, 23. A first secondary winding 52 and a second secondary winding 53 are wound around a third section 21C so as not to protrude in vertical and horizontal directions from the partitioning plates 22, 23. A second primary winding 54 is formed of a three-layered insulation wire, and serially coupled with the first primary winding 51. The second primary winding 54 is wound around a second section 21B so as not to protrude in vertical and horizontal directions from the partitioning plates 22, 23, and one end and the other end of the second primary winding 54 are led through lead grooves 22a of the partitioning plate 22 to a terminal block 31, while facing the portions corresponding to the lateral edges which define the cross sectional shape of the substantially cylindrical part 21. COPYRIGHT: (C)2011,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a mounting structure of an inverter transformer for preventing generation of discharging and sparking between a high voltage side terminal of the inverter transformer and a metal backlight case. SOLUTION: A power supply circuit board 16 is provided via a spacer 14 to the rear surface (upper side surface in the figure) of a metal backlight case 12 and an inverter transformer 20 is mounted to the power supply board 16. The front end side of low voltage side terminal 21 of the inverter transformer 20 is inserted into a through-hole of the power supply board 16 (not shown in the figure) and is fixed by soldering, while the high voltage side terminal 22 is guided out floating from the power supply board 16. One end of the covered insulating wire 25 is electrically connected to the high voltage side terminal 22, while the other end is connected to a ballast capacitor. COPYRIGHT: (C)2010,JPO&INPIT