Abstract: A white light-emitting device comprising a blue or blue-green light-emitting diode emitting light of 450-500 nm wavelength, and two phosphor materials capable of emitting a yellow light with 520 to 580 nm wavelength, and a red light with 580 to 640 nm wavelength, respectively. The light-emitting diode and the two phosphor materials are packaged together to form the white light-emitting device.

Abstract: The subject invention relates to yttrium aluminum garnet fluorescent powders with formula (Y3-x-yZxEuy)Al5O12 or (Y3ZxEuy)Al5O12, wherein 0<x≦0.8, 0<y≦1.5, and Z is selected from a group consisting of rare earth metals other than europium (Eu). The subject invention also relates to a pink light-emitting device, which comprises a light-emitting diodes as a luminescent element and a fluorescent body containing yttrium aluminum garnet fluorescent powders, wherein the diode emits a light with a wavelength ranging from 370 to 410 nm, which then excites the yttrium aluminum garnet fluorescent powders in the fluorescent body to emit another light with a wavelength ranging from 585 nm to 700 nm, so the two lights combine to produce a pink light. The subject invention also relates to the preparation of the yttrium aluminum garnet fluorescent powders.

Abstract: A method for manufacturing white light source includes the steps of providing an ultra-violet light as radiation source; and preparing two kinds of phosphors each receiving the ultra-violet light and emitting light of different wavelength. One phosphor is designated to emit light covering two wavelength regimes of three primitive colors, i.e., red light (585-640 nm), green light (500-570 nm) and blue light (430-490 nm), and another phosphor is designated to emit light covering remaining wavelength regime of the three primitive colors. The phosphors are mixed in predetermined ratio such that the lights of different wavelength are combined to provide a white light.

Abstract: A fluorescent material with formula(YxMyCez)Al5O12, where x+y=3, x, y≠0, 0<z<0.5, M is selected from the group consisting of Tb, Lu, and Yb. The fluorescent material has a host (YxMy)Al5O12 and an activator: Ce. By changing the composition of metals in the host, the crystal field thereof can be modulated, thereby altering the interaction force between the activator and the other components, and changing the wavelength of emitted colors. The present invention provides a white light-emitting device comprising a light emitting diode and above-mentioned fluorescent powder. The LED emits purple-blue or blue light having a domination wavelength AD range from 430 nm to 500 nm. The fluorescent powder is excited by the purple-blue or blue light emitted from the LED to generate green-yellow light to orange-yellow light having a wavelength range from 560 nm to 590 nm and mixed with the light of LED to form white light.

Abstract: A fluorescent material with formula(YxMyCez)Al5O12, where x+y=3, x, y≠0, 0<z<0.5, M is selected from the group consisting of Tb, Lu, and Yb. The fluorescent material has a host (YxMy)Al5O12 and an activator: Ce. By changing the composition of metals in the host, the crystal field thereof can be modulated, thereby altering the interaction force between the activator and the other components, and changing the wavelength of emitted colors. The present invention provides a white light-emitting device comprising a light emitting diode and above-mentioned. fluorescent powder. The LED emits purple-blue or blue light having a domination wavelength &lgr;D range from 430 nm to 500 nm. The fluorescent powder is excited by the purple-blue or blue. light emitted from-the LED to generate green-yellow light to orange-yellow light having a wavelength range from 560 nm to 590 nm and mixed with the light of LED to form white light.

Abstract: The subject invention relates to yttrium aluminum garnet fluorescent powders with formula (Y3-x-yZxEuy)Al5O12 or (Y3ZxEuy)Al5O12, wherein 0<x≦0.8, 0<y≦1.5, and Z is selected from a group consisting of rare earth metals other than europium (Eu). The subject invention also relates to a pink light-emitting device, which comprises a light-emitting diodes as a luminescent element and a fluorescent body containing yttrium aluminum garnet fluorescent powders, wherein the diode emits a light with a wavelength ranging from 370 to 410 nm, which then excites the yttrium aluminum garnet fluorescent powders in the fluorescent body to emit another light with a wavelength ranging from 585 nm to 700 nm, so the two lights combine to produce a pink light. The subject invention also relates to the preparation of the yttrium aluminum garnet fluorescent powders.

Abstract: A method for manufacturing a white light source provides an LED light source and a semiconductor-type phosphor with (Zn, Cd)S being the host with foreign ions added thereto as luminescence centers. The LED light source emits light ranging from 495 nm about (blue-green light) to about 340 nm (ultra-violet).

Abstract: A method for manufacturing a white light source includes steps of providing an ultra-violet light as a radiation source, preparing three kinds of first phosphors each receiving the ultra-violet light and emitting the light of red, green and blue, respectively, and preparing at least one additional second phosphor to modify a spectral property of the light emitted by the three first phosphors in order to improve the brightness and color rendering property of the white light source. Moreover, at least one phosphor with the fluorescent property is used as the above second phosphor powder to obtain a color-changeable light source.

Abstract: A manufacturing method for white light source utilizes an ultraviolet light source and suitable phosphors. One of the phosphors is directly excited by the ultraviolet light source and generates a radiation with longer wavelength. Other phosphors are excited by the radiation with longer wavelength and generate radiation with much longer wavelength. The lights generated by those phosphors are mixed to form a white light.

Abstract: A light emitting diode and a method for making the same are proposed. The LED comprises an inorganic phosphor, a silicon compound and an organic glue. The silicon compound has one side being completely or partially C1-C6 alkyl oxide reacted with the inorganic phosphor to modify the surface property of the inorganic phosphor and another side being a functional group selected from a group consisting of epoxy, C1-C6 alkyl, phenyl, amino. The inorganic phosphor with modified surface property can be uniformly mixed in the glue and less deposition is produced.

Abstract: A light emitting diode and a method for making the same are proposed. The LED comprises an inorganic phosphor, a silicon compound and an organic glue. The silicon compound has one side being completely or partially C1-C6 alkyl oxide reacted with the inorganic phosphor to modify the surface property of the inorganic phosphor and another side being a functional group selected from a group consisting of epoxy, C1-C6 alkyl, phenyl, amino. The inorganic phosphor with modified surface property can be uniformly mixed in the glue and less deposition is produced.

Abstract: A manufacturing method for white light source utilizes an ultraviolet light source and suitable phosphors. One of the phosphors is directly excited by the ultraviolet light source and generates a radiation with longer wavelength. Other phosphors are excited by the radiation with longer wavelength and generate radiation with much longer wavelength. The lights generated by those phosphors are mixed to form a white light.

Abstract: A method for manufacturing white light source includes the steps of providing an ultra-violet light as radiation source; and preparing two kinds of phosphors each receiving the ultra-violet light and emitting light of different wavelength. One phosphor is designated to emit light covering two wavelength regimes of three primitive colors, i.e., red light (585-640 nm), green light (500-570 nm) and blue light (430-490 nm), and another phosphor is designated to emit light covering remaining wavelength regime of the three primitive colors. The phosphors are mixed in predetermined ratio such that the lights of different wavelength are combined to provide a white light.

Abstract: The subject invention relates to a pink light-emitting device with high brightness, which comprises a light-emitting diode as a luminescent element and a fluorescent body containing yttrium aluminum garnet fluorescent powders with formula of (Y3−x−yCexZy)Al5O12 or (Y3CexZy)Al5O12, wherein said light-emitting element emits a purple to blue light with a wavelength ranging from 400 nm to 450 nm, 0<x≦0.8, 0.5<y≦2.5, and Z is selected from a group consisting of rare earth metals other than cerium (Ce).

Abstract: The subject invention relates to yttrium aluminum garnet fluorescent powders with formula (Y3-x-yZxEuy)Al5O12 or (Y3ZxEuy)Al5O12, wherein 0<x≦0.8, 0<y≦1.5, and Z is selected from a group consisting of rare earth metals other than europium (Eu). The subject invention also relates to a pink light-emitting device, which comprises a light-emitting diodes as a luminescent element and a fluorescent body containing yttrium aluminum garnet fluorescent powders, wherein the diode emits a light with a wavelength ranging from 370 to 410 nm, which then excites the yttrium aluminum garnet fluorescent powders in the fluorescent body to emit another light with a wavelength ranging from 585 nm to 700 nm, so the two lights combine to produce a pink light. The subject invention also relates to the preparation of the yttrium aluminum garnet fluorescent powders.

Abstract: An insert for a cigarette lighter socket includes a body and a contact rejuvenation tip protruding from and non-rotatable relative to the body. The contact rejuvenation tip includes abrasive elements on its surface for contacting an electrical contact in a cigarette lighter socket. In a preferred embodiment, the abrasive elements are pyramidal in shape and situated on an end surface of the contact rejuvenation tip. The abrasive elements scrape off electrically insulating material on an electrical contact in a cigarette lighter socket as the contact rejuvenation tip is rotated relative to the contact in the cigarette lighter socket. The insert includes a flexible strip attached to the body for resiliently centering a part of said body and said contact rejuvenation tip within said cigarette lighter socket.

Abstract: Improvements in a joint mechanism in which a resilient leaf spring is mounted at its tail end on a first joint member at a location adjacent one side of a locking piece engageable in notches formed in the circumferential edge of a hollow locking disk of a second joint member and its free front end being provided with a bent portion good enough to retain the front end of the locking piece. While the locking piece is being lifted up from the associated notch upon operation of an operating lever provided on the first joint member, the bent portion at the front end of the resilient leaf spring automatically swiftly moves under its own elasticity into the front end of the locking piece to lock it from engaging again in the notch thereby permitting a change in the angular position of the joint to be made.

Abstract: A joint mechanism comprised of two pivotally connected joint members rotatable about a common axis is lockable in one of a series of predetermined positions by engagement of a spring-biased pawl provided within one joint member within notches distributed about the peripheral edge of the other joint member. An operating lever comprised of a forked release element and a handle pivotally connected together cooperates with a control means to control locking and unlocking of the joint mechanism. The control means has radially extending resilient arms formed at the free end with upturned claws which, when projecting through slits formed in one side of the other joint member, prevents engagement of the pawl within said notches, and which, when being depressed into said slits by the release element of the operating lever, permits engagement of the pawl within the notches.

Abstract: Improvements in a foldable multi-position ladder joint in which one side of the locking disk of the second joint member is provided between each notch thereof and the common axial bolt with cams capable of one-way rotation under the driving action of the release element of the operating lever. The other end of the cam shaft returns the cam to its normal position upon pivoting movement of a ratchet hooked with a tension spring. Swinging of the operating lever in disengaging the locking pawl from a notch concomitantly moves the corresponding cam to rotate thereby making way for the release element to pass over and subsequent turning of the cam back to its normal position. Release of the release element is however prevented making possible the closing of the notch in achieving directly the purpose of whether or not the pawl is to be engaged in the notch.References are given here to applicant's prior U.S. applications with Ser. Nos. 532,096 and 543,445 with filing dates Sept. 14, 1983 and Oct.

Abstract: A joint having two joint members which are pivotable with respect to each other about a common axis is lockable in a series of predetermined angular positions by engaging a spring-biased pawl provided within one member in notches formed at the peripheral edge of the other member. In manually operating the joint, the forked release element and the handle pivotably connected with each other act as an operating lever in cooperation with the clawed, spring-loaded control means in controlling locking and unlocking of the joint. The claw like stop portion of the control means, when being pushed to one side within the slot having its length at least twice longer than the width of the notch by the release element in counter-clockwise direction, permits engagement of the pawl in the notches and, upon operation of the handle thereby disengaging the pawl from the notches, returns to rest position under its spring force in clockwise direction.