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No. Publication Number Title Publication/Patent Number Publication/Patent Number Publication Date Publication Date
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1 US2005001532A1
Green phosphor for general illumination applications
Publication/Patent Number: US2005001532A1 Publication Date: 2005-01-06 Application Number: 10/612,117 Filing Date: 2003-07-02 Inventor: Srivastava, Alok   Setlur, Anant   Comanzo, Holly   Assignee: Srivastava, Alok   Setlur, Anant   Comanzo, Holly   IPC: H05B033/00 Abstract: A phosphor having the formula Na2(Ln1-y-zCeyTbz)2B2O7 wherein Ln is selected from the group consisting of La, Y, Gd, Lu, Sc and combinations thereof and wherein y=0.01-0.3 and z=0.0-0.3. The phosphor is suitable for use in a white-light emitting device including a UV/blue semiconductor light source having a peak emission from about 250 to about 550 nm and a phosphor blend including a blue emitting phosphor, a red emitting phosphor and a green emitting phosphor having the above described formula. A phosphor having the formula Na2(Ln1-y-zCeyTbz)2B2O7 wherein Ln is selected from the group consisting of La, Y, Gd, Lu, Sc and combinations thereof and wherein y=0.01-0.3 and z=0.0-0.3. The phosphor is suitable for use in a white-light emitting device including a UV/blue ...More ...Less
2 US2005067944A1
Light emitting array with improved characteristics, optical writing unit, and image forming apparatus
Publication/Patent Number: US2005067944A1 Publication Date: 2005-03-31 Application Number: 10/891,179 Filing Date: 2004-07-15 Inventor: Masuda, Koji   Sakuma, Nobuo   Ito, Masahiro   Assignee: RICOH CO., LTD.   IPC: H05B033/00 Abstract: A light emitting array including at least a plurality of light emitting elements, each of which is provided thereon with a microlens in one-to-one correspondence. Light emitting portions of the light emitting element are provided having the shape of a rectangle and formed so as to satisfy the relational expression, Lmin≦D≦P, where Lmin is the length of the shorter side of the rectangle, P an alignment pitch of the light emitting elements, and D the diameter of microlens. In addition, light emitting elements are formed in line on a transparent thin film layer to satisfy the relationship, T1≦2·D2, where T1 is the thickness of the transparent thin film layer and D2 the diameter of each microlens. The light emitting array may suitably be included in the light source unit which is then incorporated into image forming apparatuses for forming mono-color or multiple-color images. A light emitting array including at least a plurality of light emitting elements, each of which is provided thereon with a microlens in one-to-one correspondence. Light emitting portions of the light emitting element are provided having the shape of a rectangle and formed so as ...More ...Less
3 US2005067945A1
Organic EL element and organic EL panel
Publication/Patent Number: US2005067945A1 Publication Date: 2005-03-31 Application Number: 10/952,645 Filing Date: 2004-09-29 Inventor: Nishikawa, Ryuji   Omura, Tetsuji   Assignee: Nishikawa, Ryuji   Omura, Tetsuji   IPC: H05B033/00 Abstract: A semi-transmissive film is provided underneath a transparent electrode of an organic EL element. The optical length of the interval between the upper surface of the semi-transmissive film and the lower surface of a counter electrode serving as a reflective layer is configured such that this interval functions as a microresonator for selecting light having a specific wavelength. Further, a light-shielding film is provided in a position corresponding to the peripheral portion of the semi-transmissive film, so as to prevent light having a different color from being ejected due to non-uniformity in the optical length. A semi-transmissive film is provided underneath a transparent electrode of an organic EL element. The optical length of the interval between the upper surface of the semi-transmissive film and the lower surface of a counter electrode serving as a reflective layer is configured ...More ...Less
4 US2005122042A1
Organic electroluminescent display device
Publication/Patent Number: US2005122042A1 Publication Date: 2005-06-09 Application Number: 10/979,109 Filing Date: 2004-11-02 Inventor: Kang, Tae-wook   Jeong, Chang-yong   Assignee: Kang, Tae-Wook   Jeong, Chang-Yong   IPC: H05B033/00 Abstract: An organic electroluminescent display device has an organic light-emitting element formed on a lower insulating substrate, an upper insulating substrate for sealing the organic light-emitting element, and a static electricity preventing member formed on the outer surface of the lower insulating substrate on which the organic light-emitting element is formed. An organic electroluminescent display device has an organic light-emitting element formed on a lower insulating substrate, an upper insulating substrate for sealing the organic light-emitting element, and a static electricity preventing member formed on the outer surface of the ...More ...Less
5 US2005116633A1
Light-emitting element and light-emitting device using the same
Publication/Patent Number: US2005116633A1 Publication Date: 2005-06-02 Application Number: 10/994,371 Filing Date: 2004-11-23 Inventor: Yamazaki, Shunpei   Nomura, Ryoji   Abe, Hiroko   Assignee: Semiconductor Energy Laboratory Co., Ltd.   IPC: H05B033/00 Abstract: It is an object of the invention is to provide a light-emitting element in which failure of the light-emitting element due to separation can be controlled and stable luminescence can be obtained with high-efficiency and for a long stretch of time by controlling separation of layers constituting the light-emitting element. According to one aspect of a light-emitting element of the invention, the light-emitting element sandwiches a plurality of layers between a pair of electrodes, wherein at least one layer of the plurality of layers is a layer containing a substance selected from bismuth oxide, cobalt oxide, chromium oxide, copper oxide, nickel oxide, and titanium oxide, or at least one layer of layers different from a light-emitting layer among the plurality of layers is a mixed region of one substance selected from bismuth oxide, cobalt oxide, copper oxide, magnesium oxide, nickel oxide, zinc oxide, and titanium oxide and an organic compound. It is an object of the invention is to provide a light-emitting element in which failure of the light-emitting element due to separation can be controlled and stable luminescence can be obtained with high-efficiency and for a long stretch of time by controlling separation of ...More ...Less
6 US2005099118A1
Organic EL device, method of manufacturing the same and electronic apparatus
Publication/Patent Number: US2005099118A1 Publication Date: 2005-05-12 Application Number: 10/915,415 Filing Date: 2004-08-11 Inventor: Kobayashi, Hidekazu   Assignee: Seiko Epson Corporation   IPC: H05B033/00 Abstract: To provide an organic EL device which is capable of forming a minute optical resonator in a light-emitting element and improving the chromaticity of color light components to be emitted, without complicating a manufacturing process, a method of manufacturing the organic EL device, and an electronic apparatus. In an organic EL device 1, each element comprises an anode 4 and a first insulating layer 10a, a light-transmitting layer 13 having a refractive index larger than that of a transparent substrate 2, a cathode 7 having light reflection which oppose a transparent electrode 4, and an organic functional layer including a light-emitting layer 6 and a hole injecting layer 5. In green color light-emitting elements, a first optical length, which is the sum of the product of film thickness and refractive index of the hole injecting layer and the product of film thickness and refractive index of the light-emitting layer, is 250 nm or less, and in blue color light-emitting elements, a second optical length, which is the sum of the product of film thickness and refractive index of the hole injecting layer and the product of film thickness and refractive index of the light-emitting layer, is 230 nm or less. A third optical length, which is the product of film thickness and refractive index of the light-transmitting layer 13, is 300 nm or less. To provide an organic EL device which is capable of forming a minute optical resonator in a light-emitting element and improving the chromaticity of color light components to be emitted, without complicating a manufacturing process, a method of manufacturing the organic EL ...More ...Less
7 US2005174043A1
Color filter and electro-optical device
Publication/Patent Number: US2005174043A1 Publication Date: 2005-08-11 Application Number: 11/004,124 Filing Date: 2004-12-06 Inventor: Kiguchi, Hiroshi   Aruga, Hisashi   Katagami, Satoru   Assignee: Seiko Epson Corporation   IPC: H05B033/00 Abstract: A color filter (200) comprises pixels (13) separated from each other by partitions (14) formed on a substrate (12) so as to have a plurality of color elements of ink. Dummy pixels (13′) are formed outside the area in which the pixels (13) are formed. The amount of ink applied to each of said pixels and the amount of ink applied to each of said dummy pixels are substantially equal. A protective film (21) covering said pixels (13) is formed so as to also cover said dummy pixels (13′). A color filter (200) comprises pixels (13) separated from each other by partitions (14) formed on a substrate (12) so as to have a plurality of color elements of ink. Dummy pixels (13′) are formed outside the area in which the pixels (13) are formed. The amount of ink ...More ...Less
8 US2005179372A1
Light emitting device
Publication/Patent Number: US2005179372A1 Publication Date: 2005-08-18 Application Number: 11/041,530 Filing Date: 2005-01-25 Inventor: Kawakami, Takahiro   Tsuchiya, Kaoru   Nishi, Takeshi   Hirakata, Yoshiharu   Kida, Keiko   Sato, Ayumi   Yamazaki, Shunpei   Assignee: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.   IPC: H05B033/00 Abstract: It is an object of the present invention to provide an active matrix light emitting device which can efficiently prevent a diffusion of impurities from a substrate to a transistor, as well as reducing a reflection of light in a process of extracting light toward the outside of the light emitting device. One feature of the present invention is a light emitting device including a substrate, a first insulating layer provided over the substrate, a transistor provided over the first insulating layer, and a second insulating layer having a first opening portion which is provided to expose the substrate as well as covering the transistor, wherein a light emitting element is provided inside the first opening portion. It is an object of the present invention to provide an active matrix light emitting device which can efficiently prevent a diffusion of impurities from a substrate to a transistor, as well as reducing a reflection of light in a process of extracting light toward the outside of ...More ...Less
9 US2005184659A1
Electroluminescence device
Publication/Patent Number: US2005184659A1 Publication Date: 2005-08-25 Application Number: 10/763,101 Filing Date: 2004-01-22 Inventor: Ibe, Takahiro   Assignee: Semiconductor Energy Laboratory Co., Ltd.   IPC: H05B033/00 Abstract: An organic EL element has excellent features as compared with other electroluminescent elements, but on the other hand, has a problem that the life of the element is not sufficiently long. In addition, since the organic EL element is expected to be applied to a mobile display and the like, it is also important to improve power efficiency. Hence, an object of the invention is to provide an element structure to realize an improvement in power efficiency and an improvement in the life of the element at the same. In the construction of an organic EL element of the invention, the first electroluminescent film 303 is sandwiched by the first anode 302 and a cathode 304, and the second electroluminescent film 305 and the second anode 306 are laminated over the cathode 304. At this time, the first anode 302 is put into contact with the second anode 306 to form a parallel circuit to decrease an electric current passing through the respective electroluminescent films. An organic EL element has excellent features as compared with other electroluminescent elements, but on the other hand, has a problem that the life of the element is not sufficiently long. In addition, since the organic EL element is expected to be applied to a mobile display ...More ...Less
10 US2005184661A1
Method and device for detecting moisture in electroluminescence display devices
Publication/Patent Number: US2005184661A1 Publication Date: 2005-08-25 Application Number: 10/783,826 Filing Date: 2004-02-20 Inventor: Chiu, Chun-yi   Su, Chih-hung   Assignee: AU Optronics Corporation   IPC: H05B033/00 Abstract: Methods and devices are disclosed for detecting undesired moisture for a luminescence display device. A moisture detector is encapsulated between two shields with one or more display elements, and has a layer of metal placed in a predetermined location close to the display elements that does not affect an operation thereof, wherein the undesired moisture is detected by monitoring one or more moisture-affected material characteristics thereof. Methods and devices are disclosed for detecting undesired moisture for a luminescence display device. A moisture detector is encapsulated between two shields with one or more display elements, and has a layer of metal placed in a predetermined location close to the display ...More ...Less
11 US2005189872A1
Organic electroluminescent display device and method of fabricating the same
Publication/Patent Number: US2005189872A1 Publication Date: 2005-09-01 Application Number: 11/118,413 Filing Date: 2005-05-02 Inventor: Park, Jae-yong   Yoo, Choong-keun   Kim, Ock-hee   Lee, Nam-yang   Kim, Kwan-soo   Assignee: LG PHILIPS LCD CO., LTD.   IPC: H05B033/00 Abstract: An organic electroluminescent display device includes a first substrate, a second substrate spaced apart and facing the first substrate, a switching thin film transistor disposed on an inner surface of the first substrate, a driving thin film transistor electrically connected to the switching thin film transistor, a connecting electrode electrically connected to the driving thin film transistor, a first electrode disposed on an inner surface of the second substrate, a partition wall disposed on the first electrode and having a transmissive hole corresponding to a pixel region between the first and second substrates, an organic layer disposed within the transmissive hole on the first electrode, and a second electrode disposed on the organic layer, wherein the second electrode is electrically connected to the driving thin film transistor through the connecting electrode. An organic electroluminescent display device includes a first substrate, a second substrate spaced apart and facing the first substrate, a switching thin film transistor disposed on an inner surface of the first substrate, a driving thin film transistor electrically connected to ...More ...Less
12 US2005146265A1
Production method for electric filed luminous body electric field luminous body pattening method and electric field light emitting display device
Publication/Patent Number: US2005146265A1 Publication Date: 2005-07-07 Application Number: 10/494,799 Filing Date: 2002-11-07 Inventor: Fukuchi, Takashi   Tsuboi, Shinzo   Minami, Tsutomu   Tatsumisago, Masahiro   Tadanaga, Kiyoharu   Matsuda, Atsunori   Assignee: Fukuchi, Takashi   Tsuboi, Shinzo   Minami, Tsutomu   Tatsumisago, Masahiro   Tadanaga, Kiyoharu   Matsuda, Atsunori   IPC: H05B033/00 Abstract: A water-repellent/oil-repellent material that is decomposed to disappear by light irradiation is used to eliminate a water-repellent/oil-repellent layer on ITO electrodes. By forming light emitting layers in regions subjected to the elimination, patterning is carried out.
13 US2005280362A1
Reducing undesirable absorption in a microcavity OLED
Publication/Patent Number: US2005280362A1 Publication Date: 2005-12-22 Application Number: 10/871,190 Filing Date: 2004-06-18 Inventor: Shore, Joel   Winters, Dustin   Boroson, Michael   Assignee: Eastman Kodak Company   IPC: H05B033/00 Abstract: An OLED device that has at least one first pixel that emits light in a desired region of the visible light spectrum including one or more light-emitting layer(s) and a reflector and a semitransparent reflector respectively disposed on opposite sides of the light-emitting layer(s) and arranged to resonate light produced by such layers such that the light produced by the at least one first pixel has a spectral component in the desired region of the visible light spectrum. The device also includes at least one layer disposed at a predetermined position between the reflector and semitransparent reflector which undesirably absorbs light in at least a portion of the desired region of the visible light spectrum, and wherein the predetermined position of the undesirably absorbing layer is selected to reduce the absorption of such layer in the desired region of the visible light spectrum. An OLED device that has at least one first pixel that emits light in a desired region of the visible light spectrum including one or more light-emitting layer(s) and a reflector and a semitransparent reflector respectively disposed on opposite sides of the light-emitting ...More ...Less
14 US2005248266A1
Actively driven organic EL device and manufacturing method thereof
Publication/Patent Number: US2005248266A1 Publication Date: 2005-11-10 Application Number: 11/182,833 Filing Date: 2005-07-18 Inventor: Hosokawa, Chishio   Assignee: Idemitsu Kosan Co., Ltd.   IPC: H05B033/00 Abstract: The present invention is a active-driving organic EL light emission device comprising an organic EL element comprising an organic luminous medium between an upper electrode and a lower electrode, and a thin film transistor for driving this organic EL element, wherein light emitted from the organic EL element is taken out from the side of the upper electrode, and the upper electrode comprises a main electrode formed of transparent conductive material, and an auxiliary electrode formed of a low-resistance material. According to the active-driving organic EL light emission device of this structure, the numerical aperture can be made large. Additionally, the sheet resistivity of the upper electrode can be made low even if luminescence is taken out from the side of the upper electrode. Thus, it is possible to provide an active-driving organic EL light emission device making it possible to display images having a high brightness and a homogenous brightness; and a method for manufacturing the same. The present invention is a active-driving organic EL light emission device comprising an organic EL element comprising an organic luminous medium between an upper electrode and a lower electrode, and a thin film transistor for driving this organic EL element, wherein light ...More ...Less
15 US2005212397A1
Fluorescent material and light-emitting device
Publication/Patent Number: US2005212397A1 Publication Date: 2005-09-29 Application Number: 10/973,835 Filing Date: 2004-10-27 Inventor: Murazaki, Yoshinori   Kinoshita, Shinpei   Kameshima, Masatoshi   Takashima, Suguru   Tamaki, Hiroto   Assignee: NICHIA CORPORATION   IPC: H05B033/00 Abstract: The present invention provides a fluorescent material comprising a light-storing first phosphor that at least partially converts energy emitted by an excitation source to a first emission spectrum that is different from the energy, and a second phosphor that at least partially converts the first emission spectrum to a second emission spectrum that is different from the first emission spectrum; a lamp equipped with such a fluorescent material; a light-emitting device that produces a whitish afterglow, comprising such a fluorescent material for converting the emission by an LED chip; and a display unit comprising a display equipped with a plurality of such light-emitting devices. The present invention provides a fluorescent material comprising a light-storing first phosphor that at least partially converts energy emitted by an excitation source to a first emission spectrum that is different from the energy, and a second phosphor that at least partially ...More ...Less