Patents Assigned to NEC LCD Technologies
  • Publication number: 20050227399
    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: Application
    Filed: May 20, 2005
    Publication date: October 13, 2005
    Applicant: NEC LCD TECHNOLOGIES, LTD.
    Inventors: Takasuke Hayase, Keiko Yamada, Masami Yamashita, Shinichi Nakata, Akitoshi Maeda
  • Patent number: 6954250
    Abstract: In an LCD, according to an embodiment of the present invention, a projection 6 is structured on top of insulation layer 8 on a TFT glass substrate 10 and under part of a black matrix 9. The projection 6 encircles the transparent region in each pixel so that a spacer 17 cannot climb over the projection 6 and enter the transparent region even though a certain pressure is applied onto the substrates 10 and 11. The width of the projection 6 is equal to or less than the diameter of the spacer 17. The height of the projection 6 is equal to or longer than approximately 1% the length of the diameter of the spacer 17, and it is preferable that it be equal to or longer than approximately 2%.
    Type: Grant
    Filed: July 2, 2004
    Date of Patent: October 11, 2005
    Assignee: NEC LCD Technologies, Ltd.
    Inventor: Shoichi Kuroha
  • Patent number: 6953976
    Abstract: A method of deforming a pattern comprising the steps of: forming, over a substrate, a layered-structure with an upper surface including at least one selected region and at least a re-flow stopper groove, wherein the re-flow stopper groove extends outside the selected region and separate from the selected region; selectively forming at least one pattern on the selected region; and causing a re-flow of the pattern, wherein a part of an outwardly re-flowed pattern is flowed into the re-flow stopper groove, and then an outward re-flow of the pattern is restricted by the re-flow stopper groove extending outside of the pattern, thereby to form a deformed pattern with at least an outside edge part defined by an outside edge of the re-flow stopper groove.
    Type: Grant
    Filed: November 21, 2002
    Date of Patent: October 11, 2005
    Assignee: NEC LCD Technologies, Ltd.
    Inventor: Shusaku Kido
  • Publication number: 20050219434
    Abstract: In a liquid crystal display panel for displaying image data by driving a number of pixel areas in a matrix array with thin-film transistors, a thin-film transistor in a display part and a peripheral thin-film transistor are formed as thin-film transistor of the same size (i.e., outer shape).
    Type: Application
    Filed: March 30, 2005
    Publication date: October 6, 2005
    Applicant: NEC LCD Technologies, Ltd.
    Inventor: Hiroshi Sakurai
  • Publication number: 20050213004
    Abstract: In a semi-transmission type liquid crystal display device, a source electrode of a TFT in a reflection area of an active matrix substrate is used also as a reflection film, and a transparent electrode film in a transmission area is provided so as to extend onto a surface of a convex-shaped transparent organic film on the TFT, and electrically connected to the source electrode through a contact hole. An opposite electrode of an opposite substrate is made of the same material as the transmission electrode film. Thus, occurrence of flickers due to a residual DC voltage is suppressed.
    Type: Application
    Filed: March 23, 2005
    Publication date: September 29, 2005
    Applicant: NEC LCD TECHNOLOGIES, LTD.
    Inventors: Michiaki Sakamoto, Kenichiro Naka
  • Patent number: 6950165
    Abstract: An in-plane switching mode liquid crystal display device includes a substrate, a scanning line formed on the substrate, a data line formed above the substrate to cross the scanning line while interposing an insulation film between the data line and the scanning line, and a transparent common electrode interconnect line located farther the substrate than the scanning line and the data line and having a width longer than those of the scanning line and the data line, and further, formed to geometrically cover the scanning line and the data line. The construction of the device makes it possible to make all electric fields from the data line and the scanning line terminate on the common electrode interconnect line. Forming the common electrode interconnect line with a transparent conductive material maintains the aperture ratio of the device.
    Type: Grant
    Filed: March 27, 2003
    Date of Patent: September 27, 2005
    Assignee: NEC LCD Technologies, Ltd.
    Inventors: Kimikazu Matsumoto, Kunimasa Itakura, Shinichi Nishida
  • Patent number: 6950166
    Abstract: A LCD device has a black matrix defining a plurality of pixel areas in the LCD device. An interconnect layer formed on a TFT panel includes a first interconnect line passing through the pixel area and a second interconnect line passing outside the pixel area. The first interconnect line is lower in a product of a thickness thereof by a surface reflectance thereof than the second interconnect line.
    Type: Grant
    Filed: July 29, 2003
    Date of Patent: September 27, 2005
    Assignee: NEC LCD Technologies, Ltd.
    Inventor: Tsutomu Kadotani
  • Patent number: 6949766
    Abstract: A method of deforming a pattern comprising the steps of: forming, over a substrate, a layered-structure with an upper surface including at least one selected region and at least a re-flow stopper groove, wherein the re-flow stopper groove extends outside the selected region and separate from the selected region; selectively forming at least one pattern on the selected region; and causing a re-flow of the pattern, wherein a part of an outwardly re-flowed pattern is flowed into the re-flow stopper groove, and then an outward re-flow of the pattern is restricted by the re-flow stopper groove extending outside of the pattern, thereby to form a deformed pattern with at least an outside edge part defined by an outside edge of the re-flow stopper groove.
    Type: Grant
    Filed: February 17, 2004
    Date of Patent: September 27, 2005
    Assignee: NEC LCD Technologies, Ltd.
    Inventor: Shusaku Kido
  • Patent number: 6947103
    Abstract: A reflection type liquid crystal display device having excellent display capability even if the number of the photolithography process is reduced and a process for producing the device. A process includes the steps of (a) forming a source/drain wiring by using a first mask; (b) forming a thin film transistor region and gate wiring by using a second mask; (c) forming an opening for a transistor, in a passivation film by using a third mask; (d) forming a rough surface of the interlayer insulating film and to form an opening for the transistor by using a fourth mask by halftone exposure, and (e) forming a reflective metal which extend through the respective openings for the transistor in the passivation film and the interlayer insulating film so that it is electrically connected to the source wiring by using a fifth mask.
    Type: Grant
    Filed: November 30, 2001
    Date of Patent: September 20, 2005
    Assignee: NEC LCD Technologies, Ltd.
    Inventors: Hiroshi Sakurai, Hidenori Ikeno, Yuichi Yamaguchi, Hiroshi Kano
  • Patent number: 6947113
    Abstract: A method of fabricating a liquid crystal display device, includes the steps of (a) coating a material of which an alignment film is composed, on first and second substrates, (b) blowing gas to a surface of the material to dry the material, (c) rubbing the material for forming the alignment film, (d) arranging the first and second substrates such that the alignment films formed on the first and second substrates face each other, and filling a gap formed between the first and second substrates with liquid crystal.
    Type: Grant
    Filed: June 18, 2002
    Date of Patent: September 20, 2005
    Assignee: NEC LCD Technologies, Ltd.
    Inventor: Daisuke Inoue
  • Patent number: 6945443
    Abstract: A device for parting a laminated substrate used for a liquid crystal cell is provided which is capable of obtaining, at a time of the parting, a parting line being vertical to a face on which a scribe line is formed, thus enabling prevention of a failure in the parting of the laminated substrate. To part the laminated substrate made of a first substrate and a second substrate into a plurality of substrates used for the liquid crystal cell, the scribe line is formed on one substrate out of the first substrate and second substrate along a boundary of the substrate used for the liquid crystal cell and multiple parting force is applied by timesharing to the other substrate out of the first and second substrates along the scribe line.
    Type: Grant
    Filed: April 23, 2003
    Date of Patent: September 20, 2005
    Assignee: NEC LCD Technologies, Ltd.
    Inventor: Tadashi Matsuzawa
  • Publication number: 20050200790
    Abstract: Lattice-shaped pixel electrodes and lattice-shaped common electrodes are provided on a substrate in which switching elements of a horizontal electric-field liquid crystal display device such as a TFT are formed. Each pixel electrode is integrally formed with one electrode of the switching element such as the TFT. Each pixel electrode has a notch at an external periphery of a horizontal bar of the lattice-shaped pixel electrode. A contact hole connecting the common signal wiring and the common electrode in the substrate is provided in an area of the notch of the pixel electrode.
    Type: Application
    Filed: March 9, 2005
    Publication date: September 15, 2005
    Applicant: NEC LCD TECHNOLOGIES, LTD.
    Inventors: Takayuki Konno, Shinichi Nishida, Mamoru Okamoto
  • Publication number: 20050195141
    Abstract: A liquid crystal display device having two pieces of liquid crystal display panels commonly using a source driver is provided which is capable of displaying a different image in each of the two pieces of liquid crystal display panels. The liquid crystal display device includes the two liquid crystal display panels commonly using drain lines, a timing controller to control outputting timing of an image data signal for each liquid crystal display panel, a source driver to output image data, gate line by gate line, to a plurality of drain lines for each liquid crystal display panel, and gate drivers to sequentially output gate driving pulses to gate lines for each liquid crystal display panel according to a signal to provide instructions for a start of outputting of an image data signal and to a signal to control an inputting period of image data in every line.
    Type: Application
    Filed: March 4, 2005
    Publication date: September 8, 2005
    Applicant: NEC LCD TECHNOLOGIES, LTD.
    Inventor: Hiroshi Takeda
  • Patent number: 6937302
    Abstract: A liquid crystal display device including a first substrate, a second substrate facing and spaced away from the first substrate, a liquid crystal layer sandwiched between the first and second substrates, a switching device formed on the first substrate, a first electrically insulating film randomly patterned on the first substrate, a second electrically insulating film covering the first electrically insulating film therewith, and having a wavy surface, and a reflection electrode formed on the second electrically insulating film, and electrically connected to an electrode of the switching device, wherein a light passing through the second substrate and the liquid crystal layer is reflected at the reflection electrode, and the second electrically insulating film extends outwardly from the first electrically insulating film by a certain length at an end of a display region in which images are to be displayed, such that a step formed by the first and second electrically insulating films in the vicinity of the en
    Type: Grant
    Filed: January 31, 2002
    Date of Patent: August 30, 2005
    Assignee: NEC LCD Technologies, Ltd.
    Inventors: Hironori Kikkawa, Michiaki Sakamoto, Yuichi Yamaguchi, Hidenori Ikeno, Fumihiko Matsuno
  • Patent number: 6935766
    Abstract: A backlight unit for use in an LCD unit includes an optical guide plate, a tubular lamp extending along the lateral side of the optical guide plate, a reflection member including a reflector encircling the tubular lamp at three sides thereof and a reflection sheet disposed at the rear side of the optical guide plate, a chassis receiving therein the optical guide plate and the reflection member, and a lamp holder disposed at the corner portion of the chassis. The reflector has an extension at the corner portion, the extension being sandwiched between the chassis and the lamp holder to restrict the lateral movement of the reflector.
    Type: Grant
    Filed: September 16, 2003
    Date of Patent: August 30, 2005
    Assignee: NEC LCD Technologies, Ltd.
    Inventor: Noriaki Ato
  • Patent number: 6937312
    Abstract: A black matrix layer 14 is formed on a counter substrate 13 along the direction where a scanning line 2 extends, so that it continuously covers the upper parts of a common electrode line 3a, the scanning line 2, a space between the common electrode line 3a and the scanning line 2, a TFT 5, a space between the scanning line 2 and a common electrode line 3b, and the common electrode line 3b, and in the portion opposed to the signal line, the black matrix layer is eliminated.
    Type: Grant
    Filed: March 26, 2003
    Date of Patent: August 30, 2005
    Assignee: NEC LCD Technologies, Ltd.
    Inventors: Tsutomu Kadotani, Shoichi Kuroha
  • Patent number: 6933528
    Abstract: An in-plane switching mode active matrix type liquid crystal display device includes a first substrate, a second substrate located opposing the first substrate, and a liquid crystal layer sandwiched between the first and second substrates. The first substrate includes a thin film transistor, a pixel electrode, a common electrode, a data line, a scanning line, and a common electrode line. The scanning line and the common electrode line are formed in a common layer in parallel with each other. The common electrode overlaps the data line and the scanning line with an interlayer insulating film existing therebetween. The common electrode line is singly formed at either side about the scanning line. The common electrode is electrically connected to the common electrode line through a contact hole formed throughout the interlayer insulating film, and shields a gap formed between the scanning line and the common electrode line.
    Type: Grant
    Filed: April 2, 2003
    Date of Patent: August 23, 2005
    Assignee: NEC LCD Technologies, Ltd.
    Inventors: Kunimasa Itakura, Shinichi Nishida, Kimikazu Matsumoto
  • Patent number: 6930741
    Abstract: An active matrix LCD device includes a TFT panel, a counter panel and liquid crystal interposed therebetween. The TFT panel includes a plurality of scanning lines and a plurality of common lines formed in one layer and extending in a row direction, and a plurality of signal lines extending in a column direction. A coupling line for coupling the common lines together is disposed outside the pixel array of the TFT panel, such as in a TCP mounted on the TFT panel and mounting thereon a driver IC for driving the scanning lines.
    Type: Grant
    Filed: September 27, 2001
    Date of Patent: August 16, 2005
    Assignee: NEC LCD Technologies, Ltd.
    Inventors: Shigeru Kimura, Hiroaki Tanaka, Akira Fujita, Kiyofumi Kudou, Takahiko Watanabe, Hiroyuki Uchida, Akitoshi Maeda
  • Patent number: 6930744
    Abstract: To make the test probe not directly in contact with the electrode pads for the semiconductor chip mounting, without using an advanced technology for making the pitch of electrode pads narrower, and remove the chip mounting failures such as scratching of electrode pads caused by testing, adherence of impurity particles, electrical corrosion. The electrode pads 13 formed on the distal ends of the external leads 5 for press-connecting the input electrodes 12 of the semiconductor chip 6 are disposed at both sides (shown as L1) of the semiconductor chip 6. The terminal-electrode leads 2 from the electrode pads 3 pass under the semiconductor chip 6 while keeping a pitch of the electrode pads 3. The test electrode pads 4 are disposed in alternate arrangement on the distal ends of terminal-electrode leads 2. The test electrode pads 4 may be disposed in alternate arrangement in three steps or more of multiple steps.
    Type: Grant
    Filed: May 11, 2000
    Date of Patent: August 16, 2005
    Assignee: NEC LCD Technologies, Ltd.
    Inventor: Tooru Ukita
  • Publication number: 20050173762
    Abstract: A semiconductor film, which is located over a gate electrode for forming a channel region between a source electrode and a drain electrode, has a width greater than a width of the source electrode and a width of the drain electrode located over the gate electrode. Irregularities are formed in a width direction of the semiconductor film on both edge portions in the channel region.
    Type: Application
    Filed: February 8, 2005
    Publication date: August 11, 2005
    Applicant: NEC LCD Technologies, Ltd.
    Inventors: Mitsuma Ohishi, Satoshi Kimura