Formed Of Planar Phosphor Or Fluorescent Layer Separate From Illumination Source Patents (Class 349/71)
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Patent number: 7832885Abstract: The present invention provides a patterned wavelength converting structure comprising a frame, a light source, a substrate, a film, a wavelength converting layer and a pattern disposed on the film. The pattern and the wavelength converting layer can be one piece. The configuration, for example, the distribution of diffusion particles, the location, the shape or the thickness, of the pattern is configured to reduce the mura or affect the desired uniformity of a lighting area.Type: GrantFiled: February 5, 2008Date of Patent: November 16, 2010Assignee: Kismart CorporationInventors: Chun-Chung Hsiao, Hsin-Tao Huang
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Patent number: 7830472Abstract: The invention relates to a blue composition for a color filter to realize an image having a high color purity corresponding to the emission wavelength of an improved LED backlight, a color filter and a color image display device.Type: GrantFiled: April 25, 2005Date of Patent: November 9, 2010Assignee: Mitsubishi Chemical CorporationInventors: Shin Kawana, Hideaki Kaneda, Naoto Kijima
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Patent number: 7820073Abstract: A white light emitting device capable of expanding the wavelength range of a blue LED used for realizing white light. The white light emitting device according to the present invention includes a blue LED and a mixture of orange phosphor and green phosphor disposed above the blue LED.Type: GrantFiled: February 22, 2007Date of Patent: October 26, 2010Assignee: Samsung Electro-Mechanics Co., Ltd.Inventors: Chul Soo Yoon, Jong Rak Sohn, Il Woo Park
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Patent number: 7808475Abstract: Backlight support is provided for flat panel displays through use of phospho-luminescent materials. Photo-luminescent materials are integrated into a flat panel display such as an LCD display as a back panel substrate or by embedding in display pixels. When ambient light levels exceed a predetermined threshold the material is activated allowing a reduction in active backlight power. The active backlight may be provided by an electrically supported system such as an ELP, a light pipe, an LED, etc. By reducing the power of the active backlight in an analog manner or through decreasing the duty cycle, an overall power savings is accomplished for the display. By embedding different photo-luminescent materials that operate at different wavelengths, color display may be enhanced while reducing power consumption. Display properties, such as transparency, contrast, etc., may be adjusted to affect phospho-luminescent backlight support.Type: GrantFiled: April 12, 2007Date of Patent: October 5, 2010Assignee: Microsoft CorporationInventor: Shawn M. Brown
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Patent number: 7804561Abstract: A cyan-colored composition for a color filter contains a phthalocyanine blue pigment comprising either of C.I. Pigment Blue 15:3 and C.I. Pigment Blue 15:4, or both, a phthalocyanine green pigment comprising C.I. Pigment Green 7, and a pigment carrier consisting of a transparent resin, a precursor of the resin or a mixture thereof. A color filter includes a red-colored filter segment, a green-colored filter segment, a blue-colored filter segment, and a cyan-colored filter segment or a yellow-colored filter segment.Type: GrantFiled: January 10, 2007Date of Patent: September 28, 2010Assignee: Toppan Printing Co., Ltd.Inventors: Hiroshi Sasaki, Kazunori Yamada, Yusuke Iida, Noriko Asashi
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Publication number: 20100238381Abstract: A color conversion sheet realizing suppression of deterioration in a color conversion layer and improvement in light extraction efficiency is provided. The color conversion sheet includes: a color conversion layer converting a part of first color light as incident light to second color light having a wavelength longer than that of the first color light; and a pair of sealing sheets sandwiching the color conversion layer from a light incidence side and a light emitting side and each having an inorganic stack film on a substrate. Reflectance of the sealing sheet on the light incidence side to the second color light is higher than that to the first color light, and reflectance of the sealing sheet on the light emitting side to the first color light is higher than that to the second color light.Type: ApplicationFiled: March 8, 2010Publication date: September 23, 2010Applicant: SONY CORPORATIONInventors: Yoshihiro Oshima, Tsubasa Tsukahara, Yasushi Ito, Naoji Nada
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Patent number: 7800712Abstract: A cold cathode fluorescent lamp includes a tube having an inner surface coated with a fluorescent film and tubular discharge electrodes disposed at both inner ends of the tube. Each discharge electrode has an opening facing a discharge area and includes a projection in the opening, the area of the projection being reduced by electric discharge.Type: GrantFiled: February 25, 2008Date of Patent: September 21, 2010Assignees: Hitachi Displays, Ltd., Hitachi Display Devices, Ltd.Inventors: Toshio Suzuki, Toshifumi Komiya, Satoshi Muto, Reiji Torai
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Publication number: 20100225851Abstract: A transflective mode liquid crystal display (LCD) combines advantages of a transmissive mode display and a reflective mode display, and has high display quality under different indoor and outdoor ambient lights. But the transflective mode LCD brings problems of non-uniform brightness, poor contrast ratio, and non-uniform color between a transmissive area and a reflective area if light rays passing through the transmissive area and the reflective area in the transflective mode LCD are improperly controlled. Thus, an overall transmissive and reflective mode LCD is provided, which not only has all the advantages of the transmissive mode display and the reflective mode display, but also improves a brightness of a panel, and solves the problems of non-uniform brightness, poor contrast ratio, and non-uniform color.Type: ApplicationFiled: August 20, 2009Publication date: September 9, 2010Applicant: CHUNGHWA PICTURE TUBES, LTD.Inventor: Chao-Jen Chang
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Patent number: 7782422Abstract: In a display panel and a display device having the display panel, the display device has a first pixel area, a second pixel area, a third pixel area and a fourth pixel area. A red fluorescent member, a green fluorescent member and a yellow fluorescent member are formed in the first pixel area, the second pixel area and the third pixel area. The red fluorescent member emits a red light by using a blue light incident thereon. The green fluorescent member emits a green light by using a blue light incident thereon. The yellow fluorescent member emits a white light by using a blue light incident thereon. A blue light incident on the fourth pixel area passes through the fourth pixel area so that the blue light is irradiated from the fourth pixel area.Type: GrantFiled: October 19, 2005Date of Patent: August 24, 2010Assignee: Samsung Electronics Co., Ltd.Inventors: Don-Chan Cho, Seok-Hyun Nam, Hyun-Jin Kim
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Publication number: 20100208172Abstract: A polymer dispersed display apparatus includes a polymer layer, and a plurality of liquid crystal drops dispersed in the polymer layer. Quantum dots emitting a plurality of colors of light are mixed in the liquid crystal drops. Therefore, the polymer dispersed display apparatus displays colors without the need for a color filter. Thus, the polymer dispersed display apparatus need not include a polarization plate and a color filter, so that a light usage efficiency of the polymer dispersed display apparatus increases.Type: ApplicationFiled: December 17, 2009Publication date: August 19, 2010Inventors: Jae-eun Jang, Seung-nam Cha, Jae-eun Jung, Yong-wan Jin
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Publication number: 20100208173Abstract: The present invention relates to color image display devices having a combination of light shutters, a color filter having color elements of at least three colors of red, green and blue corresponding to the light shutters, and a backlight for transmission illumination, where the backlight has a phosphor layer or a phosphor film, and the phosphor layer or the phosphor film has a compound having at least element M4, element A, element D, element E and element X, where M4 is at least one element selected from Mn, Ce, Pr, Nd, Sm, Eu, Tb, Dy, Ho, Er, Tm and Yb, and includes at least Eu, A is at least one element selected from bivalent metal elements other than the element M4, D is at least one element selected from tetravalent metal elements, E is at least one element selected from trivalent metal elements, and X is at least one element selected from O, N and F.Type: ApplicationFiled: April 23, 2010Publication date: August 19, 2010Applicant: MITSUBISHI CHEMICAL CORPORATIONInventors: Shin KAWANA, Hideaki Kaneda, Naoto Kijima
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Patent number: 7777838Abstract: A liquid crystal display (LCD) comprises: a first substrate and a second substrate; a liquid crystal layer between the first and the second substrates; and a fluorescent color filter responding to light over the first substrate, thereby the fluorescent color filter supplies the light to the liquid crystal layer. A method for fabricating a LCD includes: preparing first and second substrates; depositing fluorescent material over the first substrate to form a color filter, the fluorescent material emitting the visible light in responding to the ULTRAVIOLET rays; and forming a liquid crystal layer between the first and second substrates.Type: GrantFiled: June 29, 2007Date of Patent: August 17, 2010Assignee: LG Display Co., Ltd.Inventors: Byung-Joo Lee, Sung-Min Jung, Ju-Un Park, Hyung-Ki Hong
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Publication number: 20100188606Abstract: A display device and a color adjusting method are provided. The display device includes a backlight source and color resists disposed above the backlight source for filtering the light from the backlight source. An intensity spectrum of the backlight source has several segments which includes a first segment having a peak value existing at a wavelength between 515 nm and 535 nm. The color resists have a peak transmittance, which is smaller than 75%, existing at a wavelength between 520 nm and 540 nm. In addition, the transmittance of the color resists is smaller than 0.05% at the wavelength of 730 nm. Since the wavelength ranges in the range mentioned above are correlated, the color resists are capable of adjusting the light from the backlight source to enhance the color saturation.Type: ApplicationFiled: January 21, 2010Publication date: July 29, 2010Inventors: Chun-Chieh WANG, Chun-Liang Lin, Chen-Hsien Liao
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Publication number: 20100188615Abstract: A display device, a manufacturing method thereof, and a color adjusting method used thereon are provided. The display device includes a blue light source and a display panel which includes a substrate having a color adjusting layer, a blue filter layer, and an inner polarizer disposed thereon. The color adjusting layer includes a plurality of color excitation units, wherein each color excitation unit contains a plurality of wavelength transformation materials. The blue filter layer allows only blue light to pass therethrough and absorbs other color light. The blue light passes through the inner polarizer and the blue filter layer to reach the color excitation units. The blue light further excites the wavelength transformation materials to generate different color light. A part of the different color light is transmitted to and absorbed by the blue filter layer.Type: ApplicationFiled: December 10, 2009Publication date: July 29, 2010Applicant: AU OPTRONICS CORPORATIONInventors: Chun-Chang Hung, Shui-Chih Lien
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Patent number: 7746423Abstract: A photo-luminescent (PL) liquid crystal display (LCD) including a blue dichroic mirror layer disposed under a light emitting layer is provided. Visible light generated from the light emitting layer is mostly reflected to the front side of the PL LCD, thereby increasing the light utilization efficiency thereof. A blue PL quantum dot layer is formed in blue light regions, thereby improving a narrow viewing angle and an orientation in blue pixels. An ultraviolet (UV) filter blocking UV light in the ambient light is formed to protect the light emitting layer from the excitation caused by external light, thereby preventing degradation of contrast caused by an undesired light emission.Type: GrantFiled: June 1, 2006Date of Patent: June 29, 2010Assignee: Samsung Electronics Co., Ltd.Inventors: Seoung-jae Im, Byung-ki Kim, Jae-young Choi
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Patent number: 7742122Abstract: The invention relates to a blue composition for a color filter to realize an image having a high color purity corresponding to the emission wavelength of an improved LED backlight, a color filter and a color image display device.Type: GrantFiled: April 25, 2005Date of Patent: June 22, 2010Assignee: Mitsubishi Chemical CorporationInventors: Shin Kawana, Hideaki Kaneda, Naoto Kijima
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Patent number: 7733441Abstract: It is an object of the present invention to provide a lighting system having favorable luminance uniformity in a light-emitting region when the lighting system has large area. According to one feature of the invention, a lighting system comprises a first electrode, a second electrode, a layer containing a light-emitting substance formed between the first electrode and the second electrode, an insulating layer which is formed over a substrate in a grid form and contains a fluorescence substance, and a wiring formed over the insulating layer. The insulating layer and the wiring are covered with the first electrode so that the first electrode and the wiring are in contact with each other.Type: GrantFiled: May 31, 2005Date of Patent: June 8, 2010Assignee: Semiconductor Energy Labortory Co., Ltd.Inventors: Satoshi Seo, Yasuyuki Arai
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Patent number: 7724321Abstract: A liquid crystal display having a backlight module, liquid crystal layer and a color filter layer is disclosed in the invention. An ultraviolet unit for emitting ultraviolet is disposed in the backlight module. The color filter layer is composed of a purity of pixels, and at least one of the purity of pixels is filled with a wavelength-converting material. The wavelength-converting material can convert ultraviolet into green light.Type: GrantFiled: September 23, 2005Date of Patent: May 25, 2010Assignee: Epistar CorporationInventors: Min-Hsun Hsieh, Chien-Yuan Wang
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Patent number: 7719175Abstract: A liquid crystal display contains one or more external electrode fluorescent lamps (EEFL). Each EEFL has a tube filled with a discharge gas. Opposing first and second electrodes are disposed on an outer surface of the tube. Each of the first and second electrodes includes a cap electrode at one end of the tube and a first line electrode along a length direction of the tube; and a second electrode on the outer surface, the second electrode including a second cap electrode at the other end of the tube and a second line electrode along the length direction of the tube.Type: GrantFiled: December 28, 2005Date of Patent: May 18, 2010Assignee: LG. Display Co., Ltd.Inventor: Dae-San Lim
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Publication number: 20100097544Abstract: According to an embodiment, a light emission device and a display device having the light emission device as a light source are provided.Type: ApplicationFiled: June 1, 2007Publication date: April 22, 2010Inventors: Kyu-Won Jung, Hun-Soo Kim, Bon-Gak Gu
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Patent number: 7701531Abstract: A liquid crystal display is provided with a cold-cathode fluorescent lamp including a glass mantle tube having an inside surface coated with a fluorescent film, cup-shaped electrodes disposed in opposite end parts of the mantle tube with their open ends opening into a discharge region in the mantle tube. A discharge inducing ITO film is formed in a part near each of the cup-shaped electrodes of the inside surface of the mantle tube. Cosmic rays from space penetrated the transparent glass tube and the fluorescent film and received by the discharge inducing ITO films activate free electrons moving in the glass tube and, at the same time, electrons emitted by the cup-shaped electrodes when a voltage is applied across the cup-shaped electrodes induces an electric discharge to make the cold-cathode fluorescent lamp light instantly.Type: GrantFiled: December 11, 2006Date of Patent: April 20, 2010Assignees: Hitachi Displays, Ltd., Hitachi Display Devices, Ltd.Inventor: Tokunori Goto
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Publication number: 20100079704Abstract: A liquid crystal display includes, among others, a light diffusion layer comprising a color conversion media layer and a non-conversion layer arranged on the second substrate and a backlight assembly to supply light to the first substrate and the second substrate. The backlight assembly supplies various wavelengths of lights, including blue light or UV ray. The blue rights through the liquid crystal layer enters the color conversion media layers and may generates red lights and green lights. In this case, blue lights go through non-conversion layer and diffuse and scatter out blue lights. The UV rays through the liquid crystal layer enters the color conversion media layers and may generates red light, green lights and blue lights.Type: ApplicationFiled: August 17, 2009Publication date: April 1, 2010Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventors: Don-Chan CHO, Jae-Byung Park, Jin-Seob Byun, Hae-Il Park
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Patent number: 7686493Abstract: A display comprises a light source and an image display panel disposed in an optical path from the light source. The light source comprises a primary light source for illuminating a re-emission material which comprises at least a first nanophosphor material for, when illuminated by light from the primary light source, re-emitting light in a first wavelength range different from the emission wavelength range of the primary light source. The image display panel comprises a first filter having a first narrow passband or a first narrow absorption band, the first narrow passband or first narrow absorption band being aligned or substantially aligned with the first wavelength range. The combination of a narrow wavelength range emitted by the first nanophosphor material and the narrow passband or narrow absorption band of the filter allows a display with high efficiency and a high NTSC ratio to be obtained.Type: GrantFiled: October 1, 2007Date of Patent: March 30, 2010Assignee: Sharp Kabushiki KaishaInventors: Rakesh Roshan, Peter Neil Taylor, David James Montgomery
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Publication number: 20100060822Abstract: A display apparatus (100?) includes a substrate (115a) and a light switch (210). A light source (310?) is provided at the side of the substrate (115a) and emits light of which wavelength is in the range of ultraviolet or cyan. A polarizing sheet (116), as well as a photoluminescence film (110?), is provided in front of the light source (310?). Under the excitation of the light source (310?), the photoluminescence film (110?) can emit red light, green light, blue light and/or intermediate color light among red, green and blue.Type: ApplicationFiled: September 2, 2009Publication date: March 11, 2010Inventor: Runwen Sun
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Publication number: 20100060820Abstract: A liquid crystal display includes a liquid crystal display front end component joined to a field emission device backlighting unit. The field emission device backlighting unit has a cathode and an anode. The cathode is provided with a plurality of emitter cells. The anode is provided with a screen structure having a plurality of phosphor elements that are each formed as a substantially continuous stripe. Each of the phosphor elements has a plurality of the emitter cells aligned therewith.Type: ApplicationFiled: December 18, 2006Publication date: March 11, 2010Applicant: THOMSAON LICENSINGInventors: James Kleppinger, Richard Hugh Miller, David Paul Ciampa, Peter Michael Ritt, Ernest Edwin Doerschuk
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Patent number: 7674004Abstract: Cold cathode fluorescent tubes of the first group are aligned widthwise in one side of an enclosure which is divided into two areas at a centerline running widthwise. Cold cathode fluorescent tubes of the second group are aligned widthwise in the other side of the enclosure. All of the cold cathode fluorescent tubes are symmetrically-placed with respect to the centerline running widthwise. The cold cathode fluorescent tubes positioned outside widthwise are inclined at ?2 so that the distance between each of the tubes and the aperture plane gradually decreases lengthwise from an edge toward the center of the enclosure. The cold cathode fluorescent tubes positioned inside widthwise are inclined at ?1 so that the distance between each of the tubes and the aperture plane gradually decreases lengthwise from an edge toward the center of the enclosure. The inclined angle ?1 is made greater than the inclined angle ?2.Type: GrantFiled: December 20, 2006Date of Patent: March 9, 2010Assignee: Funai Electric Co., Ltd.Inventor: Masaharu Oka
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Patent number: 7658866Abstract: A fluorescent material includes first and second phosphors. The first phosphor is a light-storing phosphor, which is represented by the general formula (M1-a-bEuaQb)Al2O4, wherein M is one type selected from the group consisting of Mg, Ca, Ba, Sr and Zn; Q is one type selected from the group consisting of Pr, Nd, Dy, Er and Ho; a is a number that satisfies 0.0001?a?0.5; and b is a number that satisfies 0.010?b?0.5. When the fluorescent material is excited for about 15 minutes by ultraviolet irradiation having about 365.0 nm wavelength with an intensity of 0.5 mW/cm2, and the color of the afterglow of the fluorescent material is measured 1 minute and 10 minutes after excitation is terminated, an amount of change between chromaticity measured 1 minute after excitation and that measured 10 minutes is in the range of ?0.001?x?0.009 and ?0.009?y?0.006.Type: GrantFiled: December 8, 2008Date of Patent: February 9, 2010Assignee: Nichia CorporationInventors: Yoshinori Murazaki, Shinpei Kinoshita, Masatoshi Kameshima, Suguru Takashima, Hiroto Tamaki
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Patent number: 7649594Abstract: A photo-luminescent liquid crystal display (PL LCD) includes: a light control unit which includes a liquid crystal (LC) layer modulating the UV light and electrodes driving the LC layer; and a light emitting layer which emits light by the UV light transmitted through the light control unit. The light emitting layer includes inorganic phosphors and semiconductor quantum dots (QDs) having a quantum confinement effect. The PL LCD includes adding QDs having a high quantum efficiency into luminescent substances having lower light utilization efficiency than other colors, for example, red phosphor having very low quantum efficiency to improve the light utilization efficiency, thereby improving the color balance.Type: GrantFiled: April 25, 2006Date of Patent: January 19, 2010Assignee: Samsung Electronics Co., Ltd.Inventors: Byung-ki Kim, Seoung-jae Im, Jae-young Choi, Eun-sung Lee, Eun-joo Jang, Jae-hee Cho
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Publication number: 20090322990Abstract: To attain a high color reproducibility as a whole image without impairing the brightness of the entire image. A color image display device comprising a combination of light shutters, a color filter having color elements of at least three colors of red, green and blue corresponding to the light shutters, and a backlight for transmission illumination, wherein a light source to be used for the backlight comprises a combination of a blue or deep blue LED and a phosphor, and the relationship between the NTSC ratio W as a color reproduction range of the color image display element and the light use efficiency Y is represented Y?0.38W+51 (wherein W?87).Type: ApplicationFiled: April 19, 2007Publication date: December 31, 2009Inventors: Shin Kawana, Hideaki Kaneda, Naoto Kijima, Naoki Sako, Noriko Endou
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Patent number: 7639317Abstract: A backlight unit of a liquid crystal display device includes a mold frame having a receiving space for receiving a reflection sheet, a prism sheet a diffusion sheet, a plurality of light-emitting diodes, and a shielding tape for affixing the reflection sheet, the prism sheet, the plurality of light-emitting diodes and the diffusion sheet within the receiving space, wherein a first color is colored at a plurality of first colored areas at a lower surface of the shielding tape corresponding to the plurality of light-emitting diodes and a second color is colored at a remaining area of the lower surface of the shielding tape other than the plurality of first colored areas.Type: GrantFiled: December 18, 2006Date of Patent: December 29, 2009Assignee: LG Display Co., Ltd.Inventor: Ki Hyun Cho
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Patent number: 7633579Abstract: A directional display device configured to display a plurality of directional images simultaneously is provided. The directional display device includes a liquid crystal panel having a liquid crystal layer and a light reflecting membrane arranged behind the liquid crystal layer. The liquid crystal panel is configured to form the plurality of images by using a plurality of pixel dots. The directional display device includes a barrier portion arranged in front of the liquid crystal panel. The barrier portion has a plurality of light shields and a plurality of apertures. Each of the apertures is arranged in such a way that one of the apertures is associated with n (an integer being no less than two) pixel dots if n images are displayed. Each of the light shields has behind thereof a luminescent layer for illuminating the liquid crystal panel.Type: GrantFiled: February 5, 2008Date of Patent: December 15, 2009Assignee: Seiko Epson CorporationInventors: Goro Hamagishi, Norio Koma
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Patent number: 7630028Abstract: A color liquid crystal display includes a wavelength converter having a plurality of wavelength conversion areas and a plurality of transparent areas. The wavelength conversion areas are disposed at the positions corresponding to red and green filters while the transparent areas are disposed at the positions corresponding to blue filters. After passing through the wavelength conversion areas, a blue light is converted to a broadband yellow light. The broadband yellow light will be subsequently converted to a red or green light of interest when it passes through red or green filters. The blue light will experience no change in wavelength when it passes through the transparent areas. With such arrangement, the displayed brightness and saturation of red and green colors can be improved, and the displayed brightness and saturation of blue color can also be enhanced.Type: GrantFiled: April 3, 2007Date of Patent: December 8, 2009Assignee: Wintek CorporationInventors: Po Hsien Wang, Hsuan Yang Chen
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Patent number: 7623197Abstract: A flat screen comprises a liquid-crystal element, such as an LCD element, for representing an image. Further, a plurality of point light sources, such as LEDs, are provided. Between the point light sources and the liquid-crystal element a light-guiding element is arranged. For rendering the brightness distribution more uniform, the light-guiding element comprises at a surface thereof a plurality of diffractive surface elements arranged in cells.Type: GrantFiled: March 3, 2006Date of Patent: November 24, 2009Assignee: Nanogate Advanced Materials GmbHInventor: Martin Klenke
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Patent number: 7609248Abstract: A luminance control apparatus of a liquid crystal display device (LCD) is presented. The LCD includes a liquid crystal display panel divided into areas, lamps, an arithmetic unit, and a lamp driver. Fewer lamps are present than the number of areas. The arithmetic unit scans pixels of each area, extracts a peak value of the gray level of pixels of the area, and calculates a maximum peak brightness value and an average value of the area. The lamp driver controls the brightness of the lamps in accordance with the average value and the maximum peak brightness value.Type: GrantFiled: June 10, 2005Date of Patent: October 27, 2009Assignee: LG. Display Co., Ltd.Inventors: Hee Jung Hong, Kyung Joon Kwon
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Patent number: 7599025Abstract: A vertical pixel structure for emi-flective display and a method thereof are provided. The vertical pixel structure has a substrate, a emitting pixel unit arranged on the substrate and a reflective pixel unit arranged on the emitting pixel unit. By using the vertical pixel structure the aperture of the display can be increased, and the power consumption can be reduced as well.Type: GrantFiled: January 2, 2006Date of Patent: October 6, 2009Assignee: Industrial Technology Research InstituteInventors: Yung-Hui Yeh, Yu-Wu Wang, Yu-Lung Liu, Chi-Chang Liao, Hsing-Lung Wang
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Publication number: 20090231515Abstract: Various embodiments related to photoluminescent backlighting for a light valve are disclosed herein. One disclosed embodiment comprises a computing device with a light valve having a viewing side and a back side. A photoluminescent material is disposed behind the back side of the light valve, and an excitation light source is positioned to illuminate the photoluminescent material. Photoluminescence from the photoluminescent material backlights the light valve when the excitation light source illuminates the photoluminescent material.Type: ApplicationFiled: March 11, 2008Publication date: September 17, 2009Applicant: MICROSOFT CORPORATIONInventors: Nigel Keam, Craig Steven Ranta
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Patent number: 7586559Abstract: The display device according to the present invention includes: a liquid crystal layer 12 having a first principal face and a second principal face opposing each other; a plurality of electrodes 14a and 14b; a fluorophore layer provided on the first principal face side of the liquid crystal layer; and an illuminator for emitting light for exciting the fluorophore layer toward the second principal face of the liquid crystal layer. When a predetermined voltage is applied, the liquid crystal layer forms an intermediate layer containing liquid crystal molecules which are oriented in a different direction from that of liquid crystal molecules in an anchoring layer near the second principal face, and causes linearly-polarized light which has been transmitted through the anchoring layer near the second principal face to be refracted toward the second principal face in or near the intermediate layer.Type: GrantFiled: March 28, 2006Date of Patent: September 8, 2009Assignee: Sharp Kabushiki KaishaInventors: Kiyoshi Minoura, Masahiro Shimizu, Hisashi Watanabe
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Publication number: 20090213296Abstract: A light unit includes a light emitting chip emitting light, a light conversion layer disposed on the light emitting chip, and the light conversion layer including a resin layer and semiconductor particles distributed on the resin layer, and a buffer layer interposed between the light emitting chip and the light conversion layer.Type: ApplicationFiled: November 5, 2008Publication date: August 27, 2009Inventors: Hae-Il Park, Jin-Seob Byun, Jae-Byung Park, Sung-Jin Hong, Don-Chan Cho
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Patent number: 7576811Abstract: A planar light source unit includes a metal frame retaining a light source panel provided with an light guide for inducing emission of light from a light source and a plastic frame that supports at least part of a peripheral edge of the light guide. The outer peripheral surface of the plastic frame with a fitting structure between the metal frame and the plastic frame and an outer frame portion contiguous to the support plate portion and sandwiched between the fixing means and the outer frame portion of the metal frame. A liquid crystal display panel is provided with a display region in which plural display pixels are arrayed and the planar light source unit.Type: GrantFiled: March 30, 2007Date of Patent: August 18, 2009Assignee: Toshiba Matsushita Display Technology Co., Ltd.Inventor: Ida Kazushige
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Publication number: 20090195730Abstract: A wavelength conversion member which can achieve high color purity and optimize color temperature according to environmental changes, a light source assembly including the wavelength conversion member, and a liquid crystal display (LCD) including the light source assembly. The light source assembly includes a light-emitting chip which generates light and a wavelength conversion member which includes wavelength conversion particles that convert the light into light having a predetermined wavelength, the predetermined wavelength being determined according to the size of the wavelength conversion particles.Type: ApplicationFiled: January 19, 2009Publication date: August 6, 2009Inventors: Jae Byung Park, Hae-Il Park, Jin-Seob Byun
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Publication number: 20090185110Abstract: An LCD display has a programmable back-light device that produces multiple different color fields from multiple different phosphor elements. The backlight device can be a low resolution FED device. The phosphor is applied by an electrophotographic screening process or direct electrostatic screening process. The FED device can further incorporate a wide gamut phosphor.Type: ApplicationFiled: October 4, 2006Publication date: July 23, 2009Inventors: Istvan Gorog, Peter Michael Ritt
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Patent number: 7545455Abstract: A liquid crystal display device is provided. The LCD device includes a top case, an inverter and a bracket. The top case surrounds a periphery of a liquid crystal display panel which displays a picture. The inverter supplies a high voltage AC power to a lamp which projects a light to the liquid crystal display panel. The bracket fastens to the top case and includes at least two fastening parts for insertion of opposite ends of the inverter, thereby reducing fabrication times for devices implementing the present invention and improving productivity.Type: GrantFiled: September 20, 2004Date of Patent: June 9, 2009Assignee: LG Display Co., Ltd.Inventor: Yong Sang Kim
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Publication number: 20090135341Abstract: The present invention relates to a backlight assembly, in which a lamp starting performance can be improved and an assembly process can be simplified, a liquid crystal display having the backlight assembly, and a method of manufacturing the backlight assembly. A backlight assembly according to the present invention includes a body, a phosphor film formed on an inside of the body, and an afterglowing material film formed on the outside of the body. Accordingly, a dark starting time can be shortened by improving a lamp starting performance of a light source.Type: ApplicationFiled: November 20, 2008Publication date: May 28, 2009Inventors: Min-Jeong Wang, Kyung-Min Kim, Seok-Hyun Nam, Sang-Hyuck Yoon, Hyun-Jin Kim, Dong-Chin Lee, Seon-Bae Kim
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Patent number: 7535524Abstract: In one embodiment, apparatus is provided with a display panel, a wavelength converting material, and a light source. The display panel is provided with an interface to receive control signals defining one or more primary images that are projected from the display panel. The wavelength converting material absorbs light of a first wavelength and emits light of a second wavelength. The wavelength converting material defines a secondary image that is projected from the display panel when the wavelength converting material is illuminated by the light of the first wavelength. The light source causes the wavelength converting material to be illuminated by the light of the first wavelength.Type: GrantFiled: May 27, 2005Date of Patent: May 19, 2009Assignee: Avago Technologies ECBU IP (Singapore) Pte. Ltd.Inventors: Janet Bee Yin Chua, Yue Hoong Lau, Tah Wee Tee, Rene P. Helbing
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Patent number: 7528902Abstract: A liquid crystal display capable of expanding a color reproduction range in the case where a cold cathode fluorescent lamp is used as a light source is provided. A green phosphor of the cold cathode fluorescent lamp includes BaMgAl10O17:Eu, Mn. The wavelength range of a green emission spectrum is located on a shorter wavelength side than that in the case where the green phosphor includes LaPO4:Ce, Tb, so the spectral width of the green emission spectrum is narrower. Therefore, an overlap between the wavelength ranges of green display light and red display light is reduced. Moreover, the spectral characteristics of blue display light (blue spectral characteristics) are set so as to satisfy predetermined conditional expressions. An overlap between the wavelength ranges of the green display light and the blue display light is also reduced.Type: GrantFiled: May 16, 2006Date of Patent: May 5, 2009Assignee: Sony CorporationInventors: Takahiro Igarashi, Tsuneo Kusunoki, Katsutoshi Ohno
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Patent number: 7505093Abstract: A liquid crystal display module includes a backlight assembly having a lamp, a lamp housing surrounding the lamp and having an open portion along a first side, a light guide plate disposed adjacent to the open portion of the lamp housing, and a plurality of optical sheets disposed on the light guide plate, edge portions of the plurality of optical sheets are disposed spaced apart from the light guide plate by interposing a top portion of the lamp housing between a periphery of the light guide plate and the edge portions of the plurality of optical sheet, a liquid crystal panel disposed over the plurality of optical sheets, a main support disposed over the lamp housing and accommodating the liquid crystal panel, a top case surrounding edge portions of the liquid crystal panel, and a bottom case supporting and accommodating the backlight assembly.Type: GrantFiled: October 6, 2004Date of Patent: March 17, 2009Assignee: LG Display Co., Ltd.Inventor: Moon-Soo Yeom
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Publication number: 20090051848Abstract: The display device according to the present invention includes: a liquid crystal layer 12 having a first principal face and a second principal face opposing each other; a plurality of electrodes 14a and 14b; a fluorophore layer provided on the first principal face side of the liquid crystal layer; and an illuminator for emitting light for exciting the fluorophore layer toward the second principal face of the liquid crystal layer. When a predetermined voltage is applied, the liquid crystal layer forms an intermediate layer containing liquid crystal molecules which are oriented in a different direction from that of liquid crystal molecules in an anchoring layer near the second principal face, and causes linearly-polarized light which has been transmitted through the anchoring layer near the second principal face to be refracted toward the second principal face in or near the intermediate layer.Type: ApplicationFiled: March 28, 2006Publication date: February 26, 2009Inventors: Kiyoshi Minoura, Masahiro Shimizu, Hisashi Watanabe
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Patent number: 7494234Abstract: A polarizer includes a first prism plate having a plurality of first micro-prisms; a polarizing film formed on surfaces of the first micro-prisms; and a second prism plate having a plurality of second micro-prisms, the micro-prisms of the first prism plate and the micro-prisms of the second prism plate meshed with each other and integrated the polarizing film therebetween, the polarizing film being in direct contact with the first prism plate and the second prism plate. Furthermore, a method for manufacturing the polarizer and a backlight module using the polarizer is also provided.Type: GrantFiled: May 24, 2006Date of Patent: February 24, 2009Assignee: Hon Hai Precision Industry Co., Ltd.Inventor: Jen-Tsorng Chang
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Patent number: 7492084Abstract: A flat-type fluorescent lamp includes a body having a plurality of discharge spaces, an electrode part disposed inside the body and crossing each of the discharge spaces and a light generating part generating a visible light by using the emitted electron. The electrode part includes an electron-transporting electrode transporting electrons from an exterior and an electron-emitting electrode on the transporting electrode to activate emission of the electrons to the discharge spaces. The flat-type fluorescent lamp has high brightness and low power consumption.Type: GrantFiled: September 19, 2005Date of Patent: February 17, 2009Assignee: Samsung Electronics Co., Ltd.Inventors: Hae-Il Park, Sang-Yu Lee, Jin-Seob Byun
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Patent number: RE41305Abstract: Herein disclosed are a liquid crystal display device and a data processing device, which can have their frame portions reduced in area to reduce the size and weight by extracting the terminals of video signals to only one side of a liquid crystal display panel and by arranging a video signal line driving circuit substrate to be connected with the terminals, only at one side of the display panel. A liquid crystal display device includes a liquid crystal display panel, a light guide plate, a fluorescent tube, and a lamp reflector. First and second lamp cables of different length are connected to the fluorescent tube.Type: GrantFiled: October 12, 2005Date of Patent: May 4, 2010Assignee: Hitachi Displays, Ltd.Inventors: Kaoru Hasegawa, Yoshio Toriyama, Naoto Kobayashi, Katsuhiko Yarita, Hironori Kondo, Masahiko Suzuki, Yoshihiro Imajo