Source: http://www.google.com/patents/US6612709?dq=7557380
Timestamp: 2014-12-21 22:00:04
Document Index: 634745917

Matched Legal Cases: ['arts 120', 'arts 120', 'arts 102', 'arts 102', 'arts 102', 'arts 102']

Patent US6612709 - Lighting device and display device using the lighting device - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inAdvanced Patent SearchPatentsA lighting device includes a light source, a light conducting plate having an incident surface receiving light emitted from the light source, a back surface and a light-emitting surface, and a reflection member having a first portion facing the back surface, and a second portion located on a side opposite...http://www.google.com/patents/US6612709?utm_source=gb-gplus-sharePatent US6612709 - Lighting device and display device using the lighting deviceAdvanced Patent SearchPublication numberUS6612709 B2Publication typeGrantApplication numberUS 08/927,498Publication dateSep 2, 2003Filing dateSep 11, 1997Priority dateMar 3, 1993Fee statusPaidAlso published asUS5704703, US6986600, US20010012202, US20030210540Publication number08927498, 927498, US 6612709 B2, US 6612709B2, US-B2-6612709, US6612709 B2, US6612709B2InventorsFumiaki Yamada, Shinpei Nagatani, Masaki Miyahara, Eiji NittouOriginal AssigneeFujitsu Display Technologies CorporationExport CitationBiBTeX, EndNote, RefManPatent Citations (22), Referenced by (9), Classifications (37), Legal Events (5) External Links: USPTO, USPTO Assignment, EspacenetLighting device and display device using the lighting deviceUS 6612709 B2Abstract A lighting device includes a light source, a light conducting plate having an incident surface receiving light emitted from the light source, a back surface and a light-emitting surface, and a reflection member having a first portion facing the back surface, and a second portion located on a side opposite to a side of the light conducting plate on which the light source is located. The second portion is spaced apart from the light conducting plate so that light emitted from the light conducting plate is oriented toward an emission surface of the lighting device.
a light source; a light conducting plate having an incident surface receiving light emitted from the light source, a back surface and a light-emitting surface; and a reflection member having a first portion facing the back surface, and a second portion located on a side opposite a side of the light conducting plate on which the light source is located, the light conducting plate comprising an emission area, a light accumulating area and a plurality of concave portions, the plurality of concave portions being provided in the emission area and the light accumulating area of the light conducting plate and orienting light emitted from the light conducting plate via the back surface toward an emission surface of the lighting device; and a cover portion covering the light-emitting surface confronting the light accumulating area of the light conducting plate. 2. The lighting device as claimed in claim 1, wherein each of the concave portions has a groove having a cross section of an approximately triangular shape.
a reflection mirror covering the light source and having said cover portion. 4. The lighting device as claimed in claim 1, wherein said light accumulating area comprises at least one concave portion confronting said cover portion.
a light source; a light conducting plate having an incident surface receiving light emitted from the light source, a back surface and a light-emitting surface; a reflection member having a first portion facing the back surface, and a second portion located on a side opposite to a side of the light conducting plate on which the light source is located, the light conducting plate comprising an emission area, a light accumulating area, and a plurality of concave portions which are formed on a back surface of the light accumulating area of the light conducting plate and orient light emitted from the light conducting plate via the back surface toward an emission surface of the lighting device; and a reflection mirror which covers the light source and one or more concave portions among the plurality of concave portions. 7. The lighting device as claimed in claim 6, wherein said concave portions are provided intermittently in said light conducting plate.
SUMMARY OF THE INVENTION It is a general object of the present invention to provide a lighting device in which the above disadvantages are eliminated.
DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 2 is a diagram of a lighting device 10 according to a first embodiment of the present invention. The lighting device 10 shown in FIG. 2 includes a light source 1 formed with, for example, a fluorescent tube, a transparent light conducting plate 2 having an incident surface 2 a, a back surface 2 b and a light-emitting surface 2 c, a reflection member 3 having a reflection surface, a sidewall surface 3 a on a side of the light conducting plate 2 opposite to the side thereof on which the light source 1 is provided, an emission surface 4, a space 5, and a reflection mirror 6.
FIG. 3 shows the operation of the lighting device shown in FIG. 2. The light emitted from the light source 1 is reflected by the reflection mirror 6 having a cross section of a half circle intended to function to collect light. The light directly coming from the light source 1 and the light reflected by the reflection mirror 6 are combined, and the combined light enters into the light conducting plate 2 via the incident surface 2 a. The light incident to the light conducting plate 2 enters at an angle of approximately �42� with respect to the normal line of the incident surface according to the Snell's law. If the surfaces of the light conducting plate 2 are vertical to the incident surface 2 a, the angle of the light reaching the surfaces of the light conducting plate 2 will be approximately �48� or greater with respect to the normal line of the surfaces of the light conducting plate 2. Hence, the light will be totally reflected by the surfaces of the light conducting plate 2, and will be propagated through the light conducting plate 2. In the above manner, the propagation light will be emitted via the end surface of the light conducting plate 2 opposite to the incident surface 2 a thereof facing the light source 1 if the surfaces of the light conducting plate 2 are vertical to the incident surface 2 a. However, according to the first embodiment of the present invention, the light conducting plate 2 has the sloped light-emitting surface 2 c forming an angle Θ with respect to the back surface 2 b so that the thickness of the plate 2 becomes thinner as the horizontal distance from the light source 1 increases. Hence, the angle of the propagation light 7 entering into the light conducting plate 2 via the incident light 2 a with respect to the light-emitting surface 2 c becomes shape (increased) by the angle Θ each time the propagation light 7 is totally reflected by the light-emitting surface 2 c. Then, some of the propagation light 7 is emitted, as the emitted light 8, from the light-emitting surface 2 c while the total reflection of the propagation light 7 is repeatedly performed, and goes toward the emission surface 4. The remaining of the propagation light 7 is totally reflected repeatedly. Further, some of the propagation light 7 is emitted from the back surface 2 b and is then reflected by the reflection surface 3 facing the back surface 2 b. The emitted light 8 includes a component which directly reaches the emission surface 4 and another component which is reflected by the sidewall surface 3 a of the reflection member 3 and is then emitted from the emission surface 4.
The fourth embodiment of the present invention is suitable for a relatively compact back-lighting device. The wavy surface which includes concave and convex portions formed on the incident light 32 a and is parallel to the light source 31. Hence, the direction in which the light entering into the light conducting plate 32 via the incident surface 32 a is propagated can be set to be equal to or greater than �42� with respect to the normal line on the incident surface 32 a perpendicular to the back surface 32 b. Hence, it becomes possible to increase the amount of light obtained in the vicinity of the light source 31. Further, the diffusion reflection sheet 37 provided between the back surface 32 b and the reflection surface 33 functions to provide an even luminance distribution.
The curved sidewall surface 43 a contributes to reducing loss of light emitted from the light conducting plate 42 whereby light can be efficiently utilized and a uniform luminance distribution can be obtained. Further, as shown in FIG. 8B, the linear prism plate 47 is arranged at an angle φ (0�<φ<90�) with respect to the electrodes 49 a and 49 b. With this arrangement, it is possible to prevent degradation of the display quantity due to interference.
The lighting device shown in FIG. 9A includes a light source 51 formed with, for example, a fluorescent tube, a transparent light conducting plate 52 having an incident surface 52 a, a back surface 52 b and a light-emitting surface 52 c, and a reflection mirror 54. The light-emitting surface 52 c is inclined at an angle Θ of 10� with respect to the back surface 52 b. The reflection mirror 54 is provided so as to cover the light source 51. A light emitted from the light source 51 is propagated through the light conducting plate 52, as indicated by reference number 58. A reference number 59 indicates light emitted from the light-emitting surface 59 c. It will be noted that the structure shown in FIG. 9A does not employ a reflection surface or the like.
FIG. 10A is a perspective view of a second lighting device, and FIG. 10B is a graph of the directivity thereof. In FIG. 10A, parts that are the same as those shown in FIG. 9A are given the same reference numbers. A reflection member 53 having a reflection surface is provided below the light conducting plate 52 so as to face the back surface 52 b. The angle Θ is set to 10�. The lighting device shown in FIG. 10A is made up of the fluorescent tube 51, the reflection mirror 54, the light conducting plate 52 and the reflection surface 53.
FIG. 11A is a perspective view of a third lighting device, and FIG. 11B is a graph of the directivity thereof. In FIG. 11A, parts that are the same as those shown in FIG. 10A are given the same reference numbers. A transparent diffusion reflection sheet 55 is provided between the back surface 52 b of the light conducting plate 52 and the reflection surface 53. A weighted diffusion reflection pattern is formed on the diffusion reflection sheet 55. The reflection surface 53 is a mirror surface. The angle Θ is set to 10�. The lighting device shown in FIG. 11A is made up of the fluorescent tube 51, the reflection mirror 54, the light conducting plate 52, the reflection member 53, and the diffusion reflection sheet 55.
FIG. 12A is a perspective view of a fourth lighting device, and FIG. 11B is a graph of the directivity thereof. In FIG. 12A, parts that are the same as those shown in FIG. 11A are given the same reference numbers. A linear prism plate 56 is used instead of the transparent diffusion reflection sheet 55 and is provided between the back surface 52 b of the light conducting plate 52 and the reflection surface 53. The surface of the linear prism plate 56 on which concave and convex portions are formed faces the light conducting plate 52 so that the axis of the prism is parallel to the longitudinal direction of the lighting device. The angle Θ is set to 10�. The lighting device shown in FIG. 12A is made up of the fluorescent tube 51, the reflection mirror 54, the light conducting plate 52, the reflection member 53, and the linear prism plate 56.
FIG. 13A is a perspective view of a fifth lighting device, and FIG. 13B is a graph of the directivity thereof. In FIG. 13A, parts that are the same as those shown in FIG. 10A are given the same reference numbers. A linear prism plate 57 is attached to the incident surface 52 a so as to face the light source 51 in such a manner that the prism axis of the plate 57 is perpendicular to the longitudinal direction of the light source 51. The angle Θ is set to 10�. The lighting device shown in FIG. 13A is made up of the fluorescent tube 51, the reflection mirror 54, the light conducting plate 52, the reflection member 53, and the linear prism plate 57.
The lighting device 80 includes a plurality of units, each having one light source 71, one light conducting plate 72 and one reflection member 73. Each of the units may be any of the lighting devices used in the first through fifth embodiments of the present invention. The units are arranged side by side so that the light-emitting surfaces 72 b of the light conducting plates 72 face upward. The side surface of each of the light conducting plates 72 are adjacent to the reflection members 73. The angle Θ formed by each light-emitting surface 72 b and each reflection member 73 is, for example, 30�. The light conducting plates 72 are made of a transparent member such as an acrylic resin. The diffusion sheet 75 functions to provide a uniform luminance distribution and prevent the reflection members 73 from being seen from the outside of the lighting device 80. Light emitted from the light-emitting surface 72 b of one unit except for light directly reaching the diffusion sheet 75 is reflected by the reflection surface 73 of the adjacent unit, and is oriented to the diffusion sheet 75.
FIG. 16 is a partially cross-sectional side view of a lighting device 80′ according to an eighth embodiment of the present invention. The lighting device 80′ includes a plurality of light sources 71′ formed with, for example, fluorescent tubes, a plurality of light conducting plates 72′ having incident surfaces 72 a′ and light-emitting surfaces 72 b′, a plurality of reflection members 73′ having reflection surfaces, a plurality of reflection mirrors 73′, and a diffusion sheet 75′. The shape of the light conducting plates 72′ differs from that of the light conducting plates 72 shown in FIG. 15 in which the light conducting plates 72′ have a cross section of an approximately equilateral triangle. The light conducting plates 72′ are arranged side by side via the reflection members 73′ so that the apexes thereof face upward. Two surfaces forming the apex of each of the light conducting plates 72′ function as light-emitting surfaces 72 b′. The angle of each apex is, for example, 30�.
FIG. 17 is a partially cross-sectional side view of a lighting device 80″ according to a ninth embodiment of the present invention. The lighting device 80″ includes a plurality of light sources 71″ formed with, for example, fluorescent tubes, a plurality of light conducting plates 72″, a plurality of reflection members 73″ having reflection surfaces, a plurality of reflection mirrors 73″, and a diffusion sheet 75″. The shape of the light conducting plates 72″ is almost the same as that of the light conducting plates 72. However, the arrangement of the plates 72″ is different from that of the plates 72. The light conducting plates 72″ having incident surfaces 72 a″ are obliquely arranged side by side and stacked so that the side surfaces 72 b″ thereof are adjacent to the reflection surfaces 73″ associated with the neighboring light conducting plates 72″. The side surfaces 72 b″ of the light conducting plates 72″ function as light-emitting surfaces. The angle of each apex is, for example, 30�. The lighting device shown in FIG. 17 can be made to be thinner than that of the lighting devices shown in FIGS. 15 and 16.
As shown in FIG. 19, the normal linear prism plate 110 has a plurality of linear prisms 111, each having a vertical angle of 90�. The linear prisms are arranged side by side and inclined at an angle a with respect to the direction (indicated by a reference number 112) orthogonal to the longitudinal direction of the light sources 105. As shown in FIG. 20, the linear prism plate 100 functions to collect incident light beams 113 entering within a wide angle range toward a normal line 114 of the linear prism plate 110. The degree of collection is equal to, for example, 40� as shown in FIG. 20.
The diffusion pattern 101 includes white ink parts 120 (FIG. 18) formed on the back surface 106 b of each of the light conducting plates 106. The white ink parts 120 are arranged so as to form a predetermined pattern. Light entering into the white ink parts 102 is diffused. As indicated by a curve I shown in FIG. 21, the white ink parts 102 are arranged on the back surface 106 b with a high density in the vicinity of the incident surface 106 a. That is, each of the white ink parts 102 located in the vicinity of the incident surface 106 a is weighted so as to have a relatively large area. The diffusion pattern 101 having the above white ink parts 102 functions to diffuse much light particularly, in the vicinity of the incident surface 106 a. The special linear prism plate 102 will be described below. FIG. 22 is a cross-sectional view of the special linear prism plate 102. As shown in FIG. 22, the special linear prism plate 102 includes first linear prisms 121 having a vertical angle of 140� and second linear prisms 122 having a vertical angle of 70�. Each of the first linear prisms 121 has a cross section of an approximately equilateral triangle shape, and each of the second linear prisms 122 also has a cross section of an approximately equilateral triangle shape. The ratio of the number of first prisms 121 to the number of second prisms 122 is 3:1.
As shown in FIG. 22, each of the linear prisms 122 having a vertical angle (the angle of each apex) of 70� totally reflects an incident light 123 to thereby introduce the light 123 upward. An incident light 125 enters into each of the linear prisms 121 having a vertical angle of 140� so that a light 126 propagated through the prism plate 102 reaches at an angle equal to or greater than the critical angle. The light 126 is totally reflected by an upper surface 102 a of the special linear prism plate 102, as indicated by the reference number 127. Then, the totally reflected light 127 goes out of the special linear prism plate 102 and is obliquely emitted downward, as indicated by the reference number 128, into the space 109. The first linear prisms 121 are parallel to the longitudinal direction of the light sources 105. Hence, the light 128 is efficiently oriented toward the center of the lighting device 100. That is, the linear prisms 121 and 122 of the special linear prism plate 102 are arranged in parallel with the longitudinal direction of the light sources 105 in order to facilitate propagation of light toward the center of the lighting device 100. It is preferable that the vertical angle of the first prisms 121 is equal to or greater than 110� and the vertical angle of the second prisms 122 is equal to or less than 110�.
A description will now be given of the positions of the linear prisms 111, 121 and 122 (FIG. 19) with respect to the display electrodes 151 and 152. The linear prisms 111 and the linear prisms 121 and 122 cross at an angle (90−α)�. Hence, it is difficult for the prisms 111, 121 and 122 to interfere with each other, so that Moire interference fringes cannot be generated. The linear prisms 111 cross the display electrodes 151 and 152 at an angle of approximately 45�. Hence, it is difficult for the linear prisms 111 and the display electrodes 151 and 152 to interfere with each other, so that Moire interference fringes cannot be generated.
As shown in FIG. 27, each groove 207 has a cross section of a triangular shape, and includes two flat slant surfaces 208 and 209, which are inclined at an angle Θ with respect to the horizontal surface. The angle Θ is selected so that the incident light is prevented from being returned to the fluorescent tube 201, and is set to, for example, 30�.
The grooves 207 function as follows. Some of the light that is emitted by the fluorescent tube 201and enters into the light conducting plate 202 via the incident light 202 c goes to one groove 207 shown in FIG. 27. The above light going to the groove 207 is classified into one of three rays of light 210, 211 or 212 due to the angle at which the light is projected on the slant surface 208. The light 210 is totally reflected by the slant surface 208, and travels to the emission surface 202 b as indicated by a reference number 210 a. The light 211 goes in the groove 207, and is reflected by the reflection surface 204 of the reflection plate 203, and enters into the light conducting plate 202 again via the slant surface 209. Then, the light 211 goes toward the emission surface 202 b as light 211 a. The light 212 goes in the groove 207, and passes therethrough. Then, the light 212 enters into the light conducting plate 202 again via the slant surface 209, and travels toward the end surface 202 d, as light 212 a. As described above, the grooves 207 function to efficiently orient the light that is propagated through the light conducting plate 202 and goes toward the back surface 202 a to the light emitting surface 202 b. Conventionally, as disclosed in Japanese Laid-Open Patent Application 2-165504, grooves related to the above-mentioned grooves 207 are arranged with an equal pitch, and the surfaces forming the grooves are inclined so that all rays of light incident to the grooves are totally reflected. Hence, the luminance distribution on the emission surface obtained with the structure disclosed in the above Japanese document is as indicated by a curve II shown in FIG. 26, in which the luminance obtained in the vicinity of the incident surface 202 c and in the vicinity of the end surface 202 d is less than the luminance obtained in other portions.
The length L1 of the light conducting plate 243 is approximately equal to, for example, 210 mm, and the thickness T1 thereof is approximately equal to, for example, 5 mm. Further, the width of the light conducting plate 243 is approximately equal to, for example, 160 mm. The distance D1 (the size of the space) is approximately equal to, for example, 9 mm. The angle φ of the grooves 207 is equal to, for example, 120�, and the depth of the grooves is equal to, for example, 0.025 mm. In practice, it is preferable to set the distance D1 to 9 mm or more and set the thickness T1 to 5 mm or more.
FIG. 42 shows a combination of the structures shown in FIGS. 18, 29 and 30. In FIG. 42, those parts that are the same as those shown in FIGS. 18, 29 and 30 are given the same reference numerals as previously. A lighting device 320 shown in FIG. 42 includes two transparent light conducting plates 241, two light sources 201, and two reflection mirrors 205. Each of the light conducting plates 241, which are arranged so that the edges 241 c face each other via the space 109, has the same structure as shown in FIG. 30. Each of the reflection mirrors 205 includes the upper cover portion 205Aa, which covers one or more grooves close to the associated light source 201. The grooves 207 of the light conducting plates 241 face the reflection plate 203 having the reflection surface 204. The special linear prism plate 102, the normal linear prism plate 110 and the diffusion sheet 116 are provided in the same manner as shown in FIG. 18. The vertical angle of each of the grooves 207 is, for example, 120�. The angle of the inclined surface 241 c with respect to the reflection plate 203 is, for example, 300.
The length L2 of the two identical light conducting plates 243 is equal to, for example, 210 mm, and the thickness T2 thereof is approximately equal to, for example, 9.3 mm. Further, the width of the light conducting plate 243 is approximately equal to, for example, 83 mm. The distance D2 (the size of the space 109) is equal to 4 mm or more. The angle φ of the grooves 207 is equal to, for example, 120�, and the depth of the grooves is equal to, for example, 0.025 mm.
The length L3 of the two identical light conducting plates 243 is equal to, for example, 210 mm, and the thickness T3 thereof is approximately equal to, for example, 5.0 mm. Further, the width of the light conducting plate 243 is approximately equal to, for example, 160 mm. The angle φ of the grooves 207 is equal to, for example, 120�, and the depth of the grooves is equal to, for example, 0.025 mm.
Patent CitationsCited PatentFiling datePublication dateApplicantTitleUS5005108 *Feb 10, 1989Apr 2, 1991Lumitex, Inc.Thin panel illuminatorUS5050946Sep 27, 1990Sep 24, 1991Compaq Computer CorporationFaceted light pipeUS5079675 *Nov 8, 1990Jan 7, 1992Deilaito Co., Ltd.Surface illuminating apparatusUS5394255 *Jan 26, 1993Feb 28, 1995Sekisui Kagaku Kogyo Kabushiki KaishaLiquid crystal display using a plurality of light adjusting sheets angled at 5 degrees or moreUS5408388Jan 22, 1993Apr 18, 1995Stanley Electric Co., Ltd.Planar illuminating deviceUS5414599Jul 8, 1992May 9, 1995Enplas CorporationSurface light source deviceUS5438484Dec 3, 1992Aug 1, 1995Canon Kabushiki KaishaSurface lighting device and a display having such a lighting deviceJPH035129A Title not availableJPH035725A Title not availableJPH046706A Title not availableJPH0337420A Title not availableJPH01261692A Title not availableJPH02165504A Title not availableJPH03111819A Title not availableJPS63324A Title not availableJPS6186709A Title not availableJPS6227306A Title not availableJPS6333703A Title not availableJPS6373789A Title not availableJPS6445003A Title not availableJPS6485781A Title not availableJPS61246702A Title not available* Cited by examinerReferenced byCiting PatentFiling datePublication dateApplicantTitleUS7104679 *Dec 23, 2002Sep 12, 2006Lg. Philips Lcd Co., Ltd.Backlight unitUS7311433 *Aug 4, 2004Dec 25, 2007Au Optronics Corp.Backlight module for an LCD (Liquid Crystal Display) systemUS7873257May 1, 2008Jan 18, 2011Morgan Solar Inc.Light-guide solar panel and method of fabrication thereofUS7991261Jan 17, 2011Aug 2, 2011Morgan Solar Inc.Light-guide solar panel and method of fabrication thereofUS8152339May 1, 2008Apr 10, 2012Morgan Solar Inc.Illumination deviceUS8328403Mar 21, 2012Dec 11, 2012Morgan Solar Inc.Light guide illumination devicesUS8657479Nov 6, 2012Feb 25, 2014Morgan Solar Inc.Light guide illumination devicesUS20110267841 *Apr 13, 2011Nov 3, 2011Myung-Woon LeeDisplay apparatusUS20120113676 *Jul 6, 2010May 10, 2012Koninklijke Philips Electronics N.V.Free form lighting module* Cited by examinerClassifications U.S. Classification362/617, 362/623, 362/621, 362/23.15, 362/23.13International ClassificationG09F13/16, G09F13/04, G02B6/00, G01D11/28, F21V8/00, B60Q3/04Cooperative ClassificationG02B6/0016, G02B6/0043, G02B6/0055, G02B6/0051, G02B6/0038, G02B6/0076, G02B6/0078, G01D11/28, B60Q3/044, G02B6/0031, G02B6/0053, G02B6/005, G02B6/0068, G02B6/0036, B60Q3/004, G02B6/0046European ClassificationB60Q3/00L1, B60Q3/04B, G02B6/00L6S2, G02B6/00L6O8P, G02B6/00L6O4S4, G02B6/00L6O8, G02B6/00L6O4G, G02B6/00L6T4, G02B6/00L6O8R, G01D11/28Legal EventsDateCodeEventDescriptionFeb 10, 2011FPAYFee paymentYear of fee payment: 8Feb 2, 2007FPAYFee paymentYear of fee payment: 4Jul 14, 2005ASAssignmentOwner name: SHARP KABUSHIKI KAISHA, JAPANFree format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:FUJITSU LIMITED;REEL/FRAME:016345/0210Effective date: 20050701Owner name: SHARP KABUSHIKI KAISHA,JAPANFree format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:FUJITSU LIMITED;US-ASSIGNMENT DATABASE UPDATED:20100203;REEL/FRAME:16345/210Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:FUJITSU LIMITED;US-ASSIGNMENT DATABASE UPDATED:20100406;REEL/FRAME:16345/210Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:FUJITSU LIMITED;US-ASSIGNMENT DATABASE UPDATED:20100413;REEL/FRAME:16345/210Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:FUJITSU LIMITED;US-ASSIGNMENT DATABASE UPDATED:20100420;REEL/FRAME:16345/210Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:FUJITSU LIMITED;US-ASSIGNMENT DATABASE UPDATED:20100504;REEL/FRAME:16345/210Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:FUJITSU LIMITED;US-ASSIGNMENT DATABASE UPDATED:20100518;REEL/FRAME:16345/210Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:FUJITSU LIMITED;US-ASSIGNMENT DATABASE UPDATED:20100525;REEL/FRAME:16345/210Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:FUJITSU LIMITED;REEL/FRAME:16345/210Jul 13, 2005ASAssignmentOwner name: FUJITSU LIMITED, JAPANFree format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:FUJITSU DISPLAY TECHNOLOGIES CORPORATION;REEL/FRAME:016345/0310Effective date: 20050630Owner name: FUJITSU LIMITED,JAPANFree format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:FUJITSU DISPLAY TECHNOLOGIES CORPORATION;US-ASSIGNMENT DATABASE UPDATED:20100203;REEL/FRAME:16345/310Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:FUJITSU DISPLAY TECHNOLOGIES CORPORATION;US-ASSIGNMENT DATABASE UPDATED:20100406;REEL/FRAME:16345/310Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:FUJITSU DISPLAY TECHNOLOGIES CORPORATION;US-ASSIGNMENT DATABASE UPDATED:20100413;REEL/FRAME:16345/310Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:FUJITSU DISPLAY TECHNOLOGIES CORPORATION;US-ASSIGNMENT DATABASE UPDATED:20100420;REEL/FRAME:16345/310Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:FUJITSU DISPLAY TECHNOLOGIES CORPORATION;US-ASSIGNMENT DATABASE UPDATED:20100504;REEL/FRAME:16345/310Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:FUJITSU DISPLAY TECHNOLOGIES CORPORATION;US-ASSIGNMENT DATABASE UPDATED:20100518;REEL/FRAME:16345/310Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:FUJITSU DISPLAY TECHNOLOGIES CORPORATION;US-ASSIGNMENT DATABASE UPDATED:20100525;REEL/FRAME:16345/310Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:FUJITSU DISPLAY TECHNOLOGIES CORPORATION;REEL/FRAME:16345/310Jan 22, 2003ASAssignmentOwner name: FUJITSU DISPLAY TECHNOLOGIES CORPORATION, JAPANFree format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:FUJITSU LIMITED;REEL/FRAME:013684/0324Effective date: 20021024Owner name: FUJITSU DISPLAY TECHNOLOGIES CORPORATION 1-1, KAMIRotateOriginal ImageGoogle Home - Sitemap - USPTO Bulk Downloads - Privacy Policy - Terms of Service - About Google Patents - Send FeedbackData provided by IFI CLAIMS Patent Services©2012 Google