Patents Assigned to NEC LCD Technologies
  • Method of manufacturing a liquid crystal display device
    Publication number: 20060240606
    Abstract: Disclosed is a photoresist film which is formed in a manner of covering at least a source electrode, a source line, a pixel electrode, a drain electrode, a drain line, a semiconductor film and a protective film, and further covering a gate insulting film in their vicinities. Moreover, wet and dry etchings are sequentially performed by using the photoresist film as a mask. Due to this etching, a residual pattern existing on the gate insulating film is etched.
    Type: Application
    Filed: April 26, 2006
    Publication date: October 26, 2006
    Applicant: NEC LCD TECHNOLOGIES, LTD.
    Inventors: Hideto Motoshima, Hisanobu Shimodozono, Junji Nishimoto, Makoto Horinouchi, Shouichi Sonohata
  • Image display method and image display device
    Patent number: 7126572
    Abstract: A display panel 13 having a plurality of pixels 14 each divided into P (P=3) sub-pixels 15a, 15b and 15c, and a source driver 12 for driving each pixel 14 in accordance with three J (=8)-bit data values corresponding to the sub-pixels 15a, 15b, and 15c, and a signal processing circuit 12 for distributing K(=12)-bit (K>J) input image data as M (M=6) time-shared frame data values and supplying the frame data values to the source driver 12 are arranged. 2K?J (=16) gray levels insufficient due to the difference between the numbers of bits of K-bit input image data and J-bit driving signals of the source driver 12 is realized by combinations of time-shared frame data of (P×M=18) ways performed for the sub-pixels 15a, 15b, and 15c in accordance with the M time-shared frame data values.
    Type: Grant
    Filed: March 26, 2003
    Date of Patent: October 24, 2006
    Assignee: NEC LCD Technologies, Ltd.
    Inventors: Koichi Koga, Noboru Okuzono, Machihiko Yamaguchi
  • Liquid crystal display panel having reflection electrodes improved in smooth surface morphology and process for fabrication thereof
    Patent number: 7123325
    Abstract: A liquid crystal display panel of the type having reflection electrodes tends to have an image-forming plane undesirably yellowed due to the wavelength dependency of transparency observed in an orientation layer on the reflection electrodes; aluminum-neodymium alloy, which has neodymium content between 5 weight % to 10 weight %, is deposited on an inter-layered insulating layer at the substrate temperature equal to or less than 170 degrees in centigrade for the reflection electrodes so that the surface morphology is represented by average pitches equal to or less than 1 micron; even though the orientation layer has the wavelength dependency of transparency, the reflection electrodes make the optical path in the orientation layer equalized so that the image-forming plane is not yellowed.
    Type: Grant
    Filed: April 14, 2005
    Date of Patent: October 17, 2006
    Assignee: NEC LCD Technologies, Ltd
    Inventors: Akitoshi Maeda, Atsushi Yamamoto, Tomohide Shindoh
  • Liquid-crystal display device and method of fabricating the same
    Patent number: 7123337
    Abstract: A LCD device is provided. On the input side, the collimated-light generator generates collimated light from incident light and then, the first polarizer plate of the first polarized-light controller generates first polarized light from the collimated light. The first quarter wavelength plate of the first polarized-light controller generates second polarized light from the first polarized light. The second polarized light thus generated passes through the liquid crystal layer to reach the output side. On the output side, the second polarized light passes through the second quarter wavelength plate of the second polarized-light controller and the second quarter wavelength plate thereof. Thus, the polarization state of the second polarized light is returned to its original one.
    Type: Grant
    Filed: April 19, 2005
    Date of Patent: October 17, 2006
    Assignee: NEC LCD Technologies, Ltd.
    Inventors: Hiroshi Okumura, Masayoshi Suzuki
  • Cushioning material and packing material for display module and transport method for display module
    Publication number: 20060226047
    Abstract: An LCD module covered a protective film and stored in a vinyl bag is held by cushioning material, and the cushioning material is placed in a box. A plurality of grooves are formed in a mutually parallel fashion on the lower and upper members of the cushioning material. The grooves form a supporting portion for supporting the edges of LCD modules that are fitted in the grooves. The depth of the grooves is slightly less than the width of the frame area of the LCD modules. An upwardly protruding convexity is formed in the area between the grooves and on both sides of the rows comprising the plurality of grooves. The convexity is a pop-out prevention portion for preventing LCD modules from popping out from the cushioning material during transport. Soiling can thereby be prevented from occurring on the display area of the display modules.
    Type: Application
    Filed: April 6, 2006
    Publication date: October 12, 2006
    Applicant: NEC LCD TECHNOLOGIES, LTD.
    Inventor: Koji Takagi
  • Illumination system and display device using the same
    Publication number: 20060221619
    Abstract: An illumination system that makes it possible to generate light with less color irregularity with a simple structure while restraining the increase of size is provided. A tube-shaped reflector having a tube-shaped wall whose inner surface is reflective is provided. The wall includes an aperture extending along a longitudinal axis of the reflector. In the reflector, plural sets of LEDs are arranged, where colors of light to be emitted from the LEDs in each set are different (for example, red, green, or blue LEDs are used for each set). The LEDs in each set are arranged along the longitudinal axis of the reflector to form a linear light source. A collecting lens is fixed to the reflector in such a way as to fill the aperture of the reflector.
    Type: Application
    Filed: March 20, 2006
    Publication date: October 5, 2006
    Applicant: NEC LCD TECHNOLOGIES, LTD.
    Inventor: Eitaro Nishigaki
  • Liquid crystal display device and driving method for liquid crystal display device
    Patent number: 7116297
    Abstract: In a liquid crystal display device where each unit pixel p arranged on a liquid crystal panel 101A is constituted by a plurality of pixels p1, p2, and p3, the pixels p1, p2, and p3 are divided into sub-pixels p11 and p12, sub-pixels p21, and p22, and sub-pixels p31 and p32, respectively. The liquid crystal display device is provided with driver ICs 201 and 202 for driving the sub-pixels p11, p21, and p31, and the sub-pixels p12, p22, and p32 constituting the pixels so that different gradation-brightness value characteristics may be given. Due to this, multi-gradation display can be performed.
    Type: Grant
    Filed: April 14, 2003
    Date of Patent: October 3, 2006
    Assignee: NEC LCD Technologies, Ltd.
    Inventors: Koichi Koga, Noboru Okuzono, Machihiko Yamaguchi
  • Active matrix liquid crystal display device
    Publication number: 20060215100
    Abstract: In a region where data wirings are formed on a TFT substrate, convex parts, each having a trapezoidal cross section or the like, are formed. A pixel electrode is formed on one of side faces of the convex part, and a common electrode is formed on the other side face. Furthermore, the pixel electrodes and the common electrodes are set to face each other between the convex parts adjacent to each other.
    Type: Application
    Filed: March 20, 2006
    Publication date: September 28, 2006
    Applicant: NEC LCD TECHNOLOGIES, LTD.
    Inventor: Hideki Ito
  • Liquid crystal display device and method of fabricating the same
    Publication number: 20060209249
    Abstract: There is provided a liquid crystal display device including a display screen comprised of a plurality of areas in each of which a pixel pattern is formed, wherein any two areas located adjacent to each other, among the areas, have at least two stitches therebetween.
    Type: Application
    Filed: May 24, 2006
    Publication date: September 21, 2006
    Applicant: NEC LCD TECHNOLOGIES, LTD
    Inventors: Takayuki Ishino, Yuji Yamamoto, Shinichi Nakata, Masami Yamashita
  • Liquid crystal display device and method of fabricating the same
    Publication number: 20060209234
    Abstract: There is provided a liquid crystal display device including a display screen comprised of a plurality of areas in each of which a pixel pattern is formed, wherein any two areas located adjacent to each other, among the areas, have at least two stitches therebetween.
    Type: Application
    Filed: May 24, 2006
    Publication date: September 21, 2006
    Applicant: NEC LCD TECHNOLOGIES, LTD
    Inventors: Takayuki Ishino, Yuji Yamamoto, Shinichi Nakata, Masami Yamashita
  • Liquid crystal display device and manufacturing method of the same
    Publication number: 20060209222
    Abstract: An active matrix substrate or TFT substrate is provided with a lower layer wiring with a groove wiring structure covering surroundings of a copper layer with a barrier metal film is formed by forming a groove at an insulating substrate and depositing the barrier metal film and the copper layer in this groove. This groove wiring structure is used for a TFT substrate of a liquid crystal display (LCD) device. It is possible to manufacture an LCD device with large size, high density, a large aperture ratio and in which the disclination defects originating from a different in level of the lower layer wiring and an occurrence of disconnection failures in an upper layer wiring are suppressed.
    Type: Application
    Filed: March 15, 2006
    Publication date: September 21, 2006
    Applicant: NEC LCD TECHNOLOGIES, LTD.
    Inventors: Kyounei Yasuda, Seiji Suzuki
  • Method of fabricating liquid crystal display device
    Patent number: 7110058
    Abstract: The method of fabricating a liquid crystal display device includes the steps of (a) fabricating a switching device on a substrate, (b) forming an interlayer insulating film on the substrate such that the switching device is covered with the interlayer insulating film, and (c) forming a transparent electrode on the interlayer insulating film, the transparent electrode being electrically connected to the switching device through the interlayer insulating film, the step (c) including (c1) depositing electrically conductive, transparent and amorphous material on the interlayer insulating film, (c2) patterning the material into the transparent electrode, and (c3) turning the transparent electrode into polysilicon by thermal annealing carried out after formation of an alignment film.
    Type: Grant
    Filed: May 20, 2005
    Date of Patent: September 19, 2006
    Assignee: NEC LCD Technologies
    Inventors: Takasuke Hayase, Keiko Yamada, Masami Yamashita, Shinichi Nakata, Akitoshi Maeda
  • Active-matrix addressed reflective LCD and method of fabricating the same
    Patent number: 7110070
    Abstract: In order to improve processing steps of fabricating an active-matrix addressed reflective liquid crystal display, a lower substrate, which is positioned at one side with respect to a liquid crystal layer, is provided with two electrodes in parallel with each other and in parallel with the liquid crystal layer. One of the two electrodes is electrically coupled to a source electrode of a switching element assigned to one pixel, and the other electrode is electrically couple to a constant potential source. Each of the two electrodes has characteristics of light reflectivity, which is able to reduce the intensity of exposing light when an insulating layer provided above the electrodes is patterned.
    Type: Grant
    Filed: December 21, 2004
    Date of Patent: September 19, 2006
    Assignees: NEC Corporation, NEC LCD Technologies, Ltd.
    Inventors: Michiaki Sakamoto, Yuichi Yamaguchi, Hidenori Ikeno, Fumihiko Matsuno, Hironori Kikkawa
  • Mask for light exposure
    Publication number: 20060204863
    Abstract: Light exposure areas 103 and light masking areas 104 in a sole reticle are arrayed in alternation to one another in both the longitudinal and transverse directions. Substrate is exposed to light by multi-domain light exposure using this reticle so that the respective areas of the reticle exposed to light with respective shots A to B, B to C . . . , N to M are not adjacent to one another in the boundary portions of the reticle shifted for executing the respective shots, thus relaxing the difference in illuminance between the respective shots and the difference in finish of the boundary portions of the shots, such differences becoming imperceptible to human eyes upon displaying liquid crystal display apparatus.
    Type: Application
    Filed: May 4, 2006
    Publication date: September 14, 2006
    Applicant: NEC LCD TECHNOLOGIES, LTD.
    Inventors: Shinichi Nakata, Takayuki Ishino, Masami Yamashita
  • Thin film transistor circuit device, production method thereof and liquid crystal display using the think film transistor circuit device
    Patent number: 7105896
    Abstract: A thin film transistor circuit device and the production method thereof is demanded for a thin film transistor circuit device, which contains wiring having a structure of an aluminum alloy in a lower layer and a molybdenum alloy in an upper layer, wherein corrosion in air of the molybdenum alloy does not proceed easily. A thin film transistor circuit device which exposes a portion of wiring covered with an insulating film that connects thin film transistors of a main circuit region formed on a center portion of a substrate to a protection circuit region formed on an outer periphery of the substrate, which contains on the exposed surface a terminal which is formed of terminal electrode metal, wherein an uppermost surface of the wiring is a molybdenum alloy comprising niobium.
    Type: Grant
    Filed: July 21, 2004
    Date of Patent: September 12, 2006
    Assignee: NEC LCD Technologies, Ltd.
    Inventors: Hiroaki Tanaka, Kyounei Yasuda, Seiji Suzuki
  • Method for driving a reflection liquid crystal display wherein the liquid crystal display having particular cholesteric color filters
    Patent number: 7106402
    Abstract: A reflection liquid crystal display is such that a transparent substrate is opposed to the first substrate with a liquid crystal layer placed therebetween, and the transparent substrate is disposed forward to the first substrate in the light-incident direction. A quarter-wavelength plate is disposed in the transparent substrate, and a polarization plate is disposed on the surface at the forward side thereof in the light-incident direction. And, a reflection layer besides acting as a color filter consisting of a cholesteric liquid crystal is disposed inside liquid crystal cells of the first substrate. In the case of a wide field-of-view angle, a scattering film is disposed forward to the polarization plate in the light-incident direction.
    Type: Grant
    Filed: June 15, 2004
    Date of Patent: September 12, 2006
    Assignees: NEC Corporation, NEC LCD Technologies, Ltd.
    Inventors: Masayoshi Suzuki, Teruaki Suzuki, Toshiya Ishii
  • Backlight unit in a liquid crystal display device
    Patent number: 7106394
    Abstract: A double-sided, direct-irradiation type backlight unit has a structure of capable of reducing the luminance irregularity and improve the luminance efficiency. The backlight unit has a scatter-reflection rod member 101 between each adjacent two of elongate lamps. The scatter-reflection rod member 101 has a symmetric shape with respect to the line passing the center thereof in X-direction, and that passing the center thereof in Y-direction. The light emitted from the elongate lamp 102 in X-direction is reflected by the scatter-reflection-rod member 101 and then travels in the direction toward the front- and rear-side diffusion plates 106.
    Type: Grant
    Filed: March 24, 2004
    Date of Patent: September 12, 2006
    Assignee: NEC LCD Technologies, Ltd.
    Inventors: Shin-Ichirou Ono, Hirokazu Fukuyoshi
  • Method of fabricating and evaluating liquid-crystal display
    Patent number: 7105368
    Abstract: A LCD device prevents the color irregularities (e.g., the red-color irregularity) from occurring without complicating the fabrication processes of a color filter. Switching elements are formed on a first substrate. A color layer is formed on a second substrate. The color layer has a red sublayer, a green sublayer, and a blue sublayer. A liquid-crystal layer is located between the first and second substrates. The second substrate includes no electrodes formed in such a way as to be located on a side nearer to the liquid-crystal layer with respect to the color layer. A green-coloring composition forming the green sublayer contains a pigment having a copper phthalocyanine skeleton. A ratio in weight of the pigment with respect to the green-coloring composition is equal to or less than approximately 27%.
    Type: Grant
    Filed: June 8, 2005
    Date of Patent: September 12, 2006
    Assignee: NEC LCD Technologies, Ltd.
    Inventors: Eriko Fujimaki, Sounosuke Takahashi
  • Driving method and driving device for display panel
    Publication number: 20060197730
    Abstract: A method of driving a display panel is provided which is capable of restoring normal operation to a timing controller in which an abnormality in display control has occurred. When a signal detecting section of one timing controller detects an abnormality that no signal is input or that a supply of a clock signal is stopped, the detected result is transferred from a two-way communicating section of the one timing controller to a two-way communicating section of the other timing controller. The other timing controller having received the detected result transfers a normal image signal and/or clock signal from the two-way communicating section of the other timing controller to the two-way communicating section of the one timing controller. The one timing controller exerts display control of a liquid crystal display panel according to the transferred image signal and/or clock signal.
    Type: Application
    Filed: March 3, 2006
    Publication date: September 7, 2006
    Applicant: NEC LCD TECHNOLOGIES, LTD.
    Inventors: Kouichi Ooga, Tsuyoshi Ichiraku
  • Liquid-crystal display device
    Patent number: 7102707
    Abstract: A LCD device prevents the color irregularities (e.g., the red-color irregularity) from occurring without complicating the fabrication processes of a color filter. Switching elements are formed on a first substrate. A color layer is formed on a second substrate. The color layer has a red sublayer, a green sublayer, and a blue sublayer. A liquid-crystal layer is located between the first and second substrates The second substrate includes no electrodes formed in such a way as to be located on a side nearer to the liquid-crystal layer with respect to the color layer. A green-coloring composition forming the green sublayer contains a pigment having a copper phthalocyanine skeleton. A ratio in weight of the pigment with respect to the green-coloring composition is equal to or less than approximately 27%.
    Type: Grant
    Filed: April 3, 2003
    Date of Patent: September 5, 2006
    Assignee: NEC LCD Technologies, Ltd.
    Inventors: Eriko Fujimaki, Sounosuke Takahashi