Patent application number | Description | Published |
20100188605 | LIQUID CRYSTAL DISPLAY DEVICE AND POLARIZATION PLATE - The present invention has an object to provide high-luminance liquid crystal display device and polarizer, each including a reflection and polarization sheet. The present invention is a liquid crystal display device including: a backlight system including a reflection and polarization sheet; a back polarizer; a liquid crystal cell; and a front polarizer, stacked in this order, wherein the liquid crystal display device includes a protective film that protects a back face of the back polarizer, the protective film has no retardation in a thickness direction thereof, and when the protective film is viewed in plane, an optic axis of the protective film in an in-plane direction thereof is parallel to an absorption axis of the back polarizer. | 07-29-2010 |
20100271573 | LIQUID CRYSTAL DISPLAY DEVICE - The present invention provides a liquid crystal display device comprising: a first polarizer; a second polarizer; a liquid crystal cell; a first birefringent layer; and a second birefringent layer, the second polarizer having an absorption axis orthogonal to an absorption axis of the first polarizer, the liquid crystal cell being disposed between the first polarizer and the second polarizer, the first birefringent layer being disposed between the first polarizer and the liquid crystal cell, satisfying 0.6≦Nz(550)≦6, and having an in-plane slow axis orthogonal to the absorption axis of the first polarizer, the second birefringent layer being disposed between the liquid crystal cell and the second polarizer, satisfying −5≦Nz(550)≦0.4, and having an in-plane slow axis parallel to the absorption axis of the second polarizer, and at least one of the first and second birefringent layers satisfying |Rxy(450)|≦|Rxy(550)|≦|Rxy(650)|. | 10-28-2010 |
20100289988 | LIQUID CRYSTAL DISPLAY DEVICE - The present invention provides an LCD device that has a higher contrast ratio in a wide viewing angle and that can be easily produced at low cost. The present invention is a liquid crystal display device, including in the following order:
| 11-18-2010 |
20100296037 | LIQUID CRYSTAL DISPLAY DEVICE - The present invention provides a liquid crystal display device having a high contrast ratio and no coloring during black display, over a wide viewing angle range. The liquid crystal display device of the present invention includes a reverse wavelength dispersion-type biaxial retardation film having R | 11-25-2010 |
20110001912 | DISPLAY DEVICE - A display device of at least one embodiment of the present invention includes a display panel; an optical plate placed on a viewer side of the display panel with the intervention of an air layer; and an antireflection layer placed on a viewer side of the optical plate, the antireflection layer having a motheye structure over its surface. The optical plate includes a plastic layer configured to transmit visible light, a quarter-wave layer placed on a viewer side of the plastic layer, and a polarizing layer placed on a viewer side of the quarter-wave layer, the polarizing layer being configured to transmit a linear polarization. The display device is more suitable to mobile applications than the conventional devices. | 01-06-2011 |
20110025966 | LIQUID CRYSTAL DISPLAY DEVICE - The present invention provides a liquid crystal display device that has a higher contrast ratio in a wide viewing angle and that can be easily produced at low cost. The present invention is a liquid crystal display device, including in the following order:
| 02-03-2011 |
20110051061 | LIQUID CRYSTAL DISPLAY DEVICE - The present invention provides a transflective liquid crystal display device which is produced by a simple process with minimum increase in the production cost and which achieves both high-quality reflective display and transmissive display. The present invention relates to a vertical alignment transflective liquid crystal display device for transmissive display and reflective display. The display device includes: a back-side polarizer; a liquid crystal cell; a viewing-side polarizer; a first retardation layer; and a second retardation layer. The liquid crystal cell includes a pair of substrates and a liquid crystal layer disposed between the pair of substrates. The viewing-side polarizer has an absorption axis orthogonal to an absorption axis of the back-side polarizer. The first retardation layer is disposed between the liquid crystal layer and the viewing-side polarizer at a transmissive display region and a reflective display region, satisfies 1.5≦Nz≦9.0, has an in-plane slow axis orthogonal to the absorption axis of the viewing-side polarizer, and satisfies 20 nm≦Re(550)≦80 nm. The second retardation layer is disposed between the first retardation layer and the viewing-side polarizer at the reflective display region, and converts linearly polarized light incident from the viewing-side polarizer into circularly polarized light together with the first retardation layer when no voltage is applied. | 03-03-2011 |
20110051062 | METHOD FOR PRODUCING LIQUID CRYSTAL DISPLAY DEVICE, AND LIQUID CRYSTAL DISPLAY DEVICE - The present invention provides a method for easily producing at low cost a liquid crystal display device which can achieve a higher contrast ratio in a wide viewing angle range, and a liquid crystal display device. The present invention relates to a method for producing a liquid crystal display device including a first polarizer, a first birefringent layer, a liquid crystal cell, a second birefringent layer, and a second polarizer in this order. The production method comprises at least one of the following first and second steps. The first step includes: laterally stretching a raw film for the first birefringent layer including a material with positive intrinsic birefringence to produce the first birefringent layer; and bonding the first polarizer and the first birefringent layer by roll-to-roll processing. The second step includes: laterally stretching a raw film for the second birefringent layer including a material with negative intrinsic birefringence to produce the second birefringent layer; and bonding the second polarizer and the second birefringent layer by roll-to-roll processing. | 03-03-2011 |
20110090433 | LIQUID CRYSTAL DISPLAY DEVICE - A TN liquid crystal display device ( | 04-21-2011 |
20110105710 | OPTICAL RESIN, OPTICAL RESIN COMPOSITION, OPTICAL FILM, AND FILM - An optical resin comprises a copolymer of 4-methyl-1-pentene and at least one monomer selected from the group consisting of 3-methyl-1-pentene, 3-methyl-1-butene and 4,4-dimethyl-1-pentene. The content of a constituent unit (a) derived from 4-methyl-1-pentene is equal to or more than 60 mol % and equal to or less than 99 mol %, and the total content of a constituent unit (b) derived from at least one monomer selected from the group consisting of 3-methyl-1-pentene, 3-methyl-1-butene and 4,4-dimethyl-1-pentene is equal to or more than 1 mol % and equal to or less than 40 mol %. | 05-05-2011 |
20110109850 | LIQUID CRYSTAL DISPLAY - The present invention provides a liquid crystal display that can have both sufficient front contrast ratio and front white brightness. The present invention is a liquid crystal display including: a front polarizing plate; a liquid crystal cell; a back polarizing plate; and an optical element providing a polarizing effect, the components being arranged in the stated order, wherein the back polarizing plate has a higher transmittance than the front polarizing plate, the back polarizing plate has a lower contrast than the front polarizing plate, and the optical element providing a polarizing effect has a principal transmittance k | 05-12-2011 |
20110170041 | LIQUID CRYSTAL DISPLAY DEVICE - The present invention provides a liquid crystal display device that can be easily produced and has a high contrast ratio in a wide viewing angle range. The liquid crystal display device of the present invention includes in the following order: a first polarizer; a first birefringent layer (II) (nxny≧nz); a liquid crystal cell; a second quarter-wave plate having an Nz coefficient substantially equal to that of the first quarter-wave plate; a second birefringent layer (II) having an Nz coefficient and an in-plane retardation that are substantially equal to an Nz coefficient and an in-plane retardation of the first birefringent layer (II), respectively; and a second polarizer, wherein the device includes at least one birefringent layer (III) (nx≈ny≧nz) disposed at least one of: between the first birefringent layer (I) and the liquid crystal cell; and between the liquid crystal cell and the second birefringent layer (I); the first quarter-wave plate has an in-plane slow axis forming an angle of about 45° with an absorption axis of the first polarizer; the second quarter-wave plate has an in-plane slow axis substantially orthogonal to the in-plane slow axis of the first quarter-wave plate; the second polarizer has an absorption axis substantially orthogonal to the absorption axis of the first polarizer; the first birefringent layer (II) has an in-plane fast axis substantially orthogonal to the absorption axis of the first polarizer; the second birefringent layer (II) has an in-plane fast axis substantially orthogonal to the absorption axis of the second polarizer; and the device displays a black screen by aligning liquid crystal molecules in the liquid crystal layer substantially vertically to the substrate surface. | 07-14-2011 |
20110181814 | Liquid crystal display device - The present invention provides a liquid crystal display device that has a higher contrast ratio in a wide viewing angle and that can be easily produced at low cost. The present invention is a liquid crystal display device, including in the following order:
| 07-28-2011 |
20110222155 | CIRCULARLY POLARIZING PLATE AND DISPLAY DEVICE - The present invention provides at low cost a display device with superior visibility and high contrast ratio even in a bright room environment through a reduction in the undesired reflection, not only of the incident outside light from the normal direction, but also of the outside incident light from an oblique direction. The present invention is a circularly polarizing plate including a polarizer and a λ/4 plate, and the aforementioned circularly polarizing plate includes an anti-reflective layer, the aforementioned polarizer, a birefringent layer, and the aforementioned λ/4 plate which are laminated in this order, the NZ coefficient of the aforementioned birefringent layer satisfies NZ<0.1, the in-plane fast axis of the aforementioned birefringent layer is orthogonal to the absorption axis of the aforementioned polarizer, the NZ coefficient of the aforementioned λ/4 plate satisfies NZ>0.9, and the in-plane slow axis of the aforementioned λ/4 plate intersects the absorption axis of the aforementioned polarizer. | 09-15-2011 |
20120120349 | LIQUID CRYSTAL DISPLAY DEVICE - The present invention provides a circularly polarizing VA mode liquid crystal display device having an excellent gray scale viewing angle from an intermediate gray scale to a high gray scale at an azimuth angle of 45°. The liquid crystal display device according to the present invention includes: a first polarizer; a first λ/4 plate; liquid crystal cell; a second λ/4 plate; and a second polarizer in this order, wherein when an azimuth of an absorption axis of the second polarizer is defined as 0°, an in-plane slow axis of the second λ/4 plate forms an angle of approximately 45°; an in-plane slow axis of the first λ/4 plate forms an angle of approximately 135°; the absorption axis of the first polarizer forms an angle of approximately 90°, and wherein a display brightness is varied by changing an alignment state of liquid crystal molecules in a liquid crystal layer from a state that the liquid crystal molecules are approximately vertically aligned to a substrate surface, to a state that the liquid crystal molecules are tilted to the substrate surface; and the liquid crystal layer has a domain in which the liquid crystal molecules are tilted in an azimuth angle range of 12.5° to 32.5°, a domain in which the liquid crystal molecules are tilted in an azimuth angle range of 102.5° to 122.5°, and a domain in which the liquid crystal molecules are tilted in an azimuth angle range of 192.5° to 212.5°, and a domain in which the liquid crystal molecules are tilted in an azimuth angle range of 282.5° to 302.5°. | 05-17-2012 |
20120188492 | LIQUID CRYSTAL DISPLAY DEVICE - A liquid crystal display device that has a higher contrast ratio in a wide viewing angle and that can be easily produced at low cost. The liquid crystal display device may include polarizers and multiple birefringent layers. A first birefringent layer (I) can have an in-plane slow axis forming an angle of about 45° with an absorption axis of the first polarizer; the second birefringent layer (I) can have an in-plane slow axis substantially orthogonal to the in-plane slow axis of the first birefringent layer (I). | 07-26-2012 |