Patent application number | Description | Published |
20090059562 | BACKLIGHT UNIT AND LAMP FOR BACKLIGHT UNIT - The present invention is a backlight unit | 03-05-2009 |
20090096958 | FLUORESCENT LAMP, BACKLIGHT UNIT AND LIQUID CRYSTAL DISPLAY - A cold cathode fluorescent lamp includes a glass bulb ( | 04-16-2009 |
20090237597 | COLD-CATHODE FLUORESCENT LAMP, BACKLIGHT UNIT, AND LIQUID CRYSTAL DISPLAY - A cold cathode fluorescent lamp has an improved heat dissipation characteristic without an overall increase in size, and a lead wire thereof does not readily break. | 09-24-2009 |
20100027244 | FLUORESCENT LAMP, AND LIGHT EMITTING DEVICE AND DISPLAY DEVICE USING FLUORESCENT LAMP - A fluorescent lamp has a glass container that has a phosphor layer formed on an inner surface of the glass container, and that is hermetically sealed, wherein phosphors of the phosphor layer include a blue phosphor, a green phosphor, and a red phosphor, a main luminescence peak of the blue phosphor exists in a wavelength region in a range of 430 nm to 460 nm inclusive, a half-value width of a spectrum of the main luminescence peak of the blue phosphor is less than or equal to 50 nm, a main luminescence peak of the green phosphor exists in a wavelength region in a range of 510 nm to 530 nm inclusive, a half-value width of a spectrum of the main luminescence peak of the green phosphor is less than or equal to 30 nm, and a main luminescence peak of the red phosphor exists in a wavelength region in a range of 600 nm to 780 nm inclusive, and a difference between a wavelength of the main luminescence peak of the blue phosphor and a wavelength of the main luminescence peak of the green phosphor is in a range of 70 nm to 90 nm inclusive. | 02-04-2010 |
20100220462 | METHOD FOR MANUFACTURING DIRECT BACKLIGHT UNIT, FLUORESCENT LAMP AND BACKLIGHT UNIT - The orientation of fluorescent lamps is detected in a manufacturing method for a direct backlight unit that alternates orientations of adjacent fluorescent lamps. In a preparation step of the manufacturing method for the backlight unit of the present invention, a plurality of fluorescent lamps are prepared. In each of the fluorescent lamps, a length (a | 09-02-2010 |
20120268028 | POWER SUPPLY - A power supply includes: a step-down chopper unit for stepping down a DC voltage from a DC power source to a voltage required for lighting; and a dimming control unit which dims the light source by alternately repeating a switching ON period during which a drive signal having a frequency higher than that of the dimming signal is supplied to the switching element and a switching OFF period during which the supply of the drive signal to the switching element is stopped. Further, the power supply includes an inrush current prevention unit for preventing an inrush current occurring when the DC power source is turned on, and a compensation unit which applies a drive voltage to the thyristor in the switching OFF period. | 10-25-2012 |
20140035462 | LED LIGHTING DEVICE - An LED lighting device includes a step-up chopper circuit for increasing an input voltage to a prescribed DC voltage, a voltage detection circuit for detecting the DC voltage, a step-down chopper circuit for decreasing the DC voltage to apply it across a light source, a step-down chopper controlling circuit for turning on and off a switching device of the step-down chopper circuit when the DC voltage is a threshold voltage or more, and an inrush current preventing circuit having a parallel circuit of a thyristor and a thermistor. When the DC voltage is less than the threshold voltage, only the induced voltage obtained from the step-up chopper circuit is employed as a drive power supply for the thyristor. When the DC voltage is the threshold voltage or more, only the induced voltage obtained from the step-down chopper circuit is employed as the drive power supply. | 02-06-2014 |
20150015162 | LIGHTING DEVICE - A trigger-signal-output part sets a burst time cycle to a time period N (integer of two or more) times as long as a constant first cycle, and outputs a trigger signal M (positive integer of N or less) times during an operation period so as to synchronize it with the first cycle, and does not output the trigger signal during a stop period except the operation period of the burst time cycle. Alternatively, a trigger-signal-output part sets a burst time cycle to a time period N times as long as an output cycle of a trigger signal in an operation period, and sets the operation period to a time period M times as long as the output cycle, and sets a stop period except the operation period of the burst time cycle to a time period generated by multiplying the output cycle by a difference between N and M. | 01-15-2015 |
Patent application number | Description | Published |
20090121635 | Fused joint structure in a lamp tube and forming method therefor - A fused joint structure comprises a metallic foil; and a conductive member made of high melting point metal, wherein a concave portion is formed in the metallic foil and the conductive member on an area where the metallic foil is put together on a surface of the conductive member, and wherein a circumferential edge of the concave portion is covered with the conductive member. | 05-14-2009 |
20090195158 | Short arc type high-pressure discharge lamp - In a light emission portion of a short arc type high pressure discharge, a pair of electrodes, each of which has a block portion at a tip thereof, is provided, wherein a pseudo coil area made up of ring-like portions is formed in part of the block portion, and an unprocessed area whose diameter is approximately the same as that of the pseudo coil area is formed in a back side of the pseudo coil area. | 08-06-2009 |
20100079048 | SHORT ARC TYPE DISCHARGE LAMP - A short arc type discharge lamp comprises a pair of electrodes, at least one of which has an electrode main body portion and an axis portion and/or a taper portion formed between the electrode main body portion and the axis portion, wherein in the at least one of the electrodes, the axis portion has an outer diameter smaller than that of the electrode main body portion, and at least one groove extending in an axis line direction of the electrode is formed in the electrode main body portion, the axis portion or the taper portion. | 04-01-2010 |
20100156293 | Short arc type discharge lamp - A short arc type discharge lamp has a pair of electrodes, at least one of which has an electrode body and an axis part. A taper part is formed at a base side of the electrode body. Plural holes extending in an axis direction of the electrode in line are formed at the taper part. | 06-24-2010 |
20100187993 | Extra high pressure mercury lamp - An extra high pressure mercury lamp that includes an arc tube, which includes a light emission section enclosing 0.2 mg/mm | 07-29-2010 |