摘要:
Deviation in phase difference of the light passing each of the red, green, and blue dots, i.e., 2&pgr;*(&agr;*dR*&Dgr;nR+ReR)/&lgr;R, 2&pgr;*(&agr;*dG*&Dgr;nG+ReG)/&lgr;G, and 2&pgr;*(&agr;*dB*&Dgr;nB+ReB)/&lgr;B, are matched when thickness of a liquid crystal layer 7 at red, green, and blue dots are dR, dG, and dB; wavelength of a visible light passing each dot is &lgr;R, &lgr;R, and &lgr;B; refractive index anisotropy of the liquid crystal layer 7 in the visible light wavelengths &lgr;R, &lgr;R, and &lgr;B is &Dgr;nR, &Dgr;n G, and &Dgr;nB; and retardations of a retardation plate are ReR, ReG, and ReB. This enables the achievement of a reflective color LCD with high achromatic color during white display and high contrast display.
摘要:
The reflective liquid crystal display device uses only one polarizing film but achieves display of bright white and achromatic color with high contrast. The twisting angle of a nematic liquid crystal is set to 45° to 90°, and the retardation value of a liquid crystal layer is set to &Dgr;nLC·dLC=0.20 &mgr;m to 0.30 &mgr;m. Two retardation films are configured with a structural component having small chromatic dispersion in refractive index anisotropy and a z coefficient from 03 to 1.0. Retardation values of these two retardation films are set to RF1=0.23 &mgr;m to 0.28 &mgr;m, and RF2=0.13 &mgr;m to 0.18 &mgr;m. When the angle of an absorption axis direction of the polarizing film is denoted by &phgr;P, and the angles of retardation axes directions of the two retardation films are denoted by &phgr;F1 and &phgr;F2, a set of Formulae &phgr;P=75°-195°, &phgr;P-&phgr;F1=95°-115°, and &phgr;P-&phgr;F2=155°-175° are satisfied.
摘要:
A reflection type liquid crystal display element of normally white type and a reflection type liquid crystal display element of normally black type, both high in brightness and contrast, and capable of changing into black or white achromatically, are obtained. The constitution includes a liquid crystal cell having a first substrate, a second substrate, and a liquid crystal disposed between the first substrate and the second substrate, a light reflecting member disposed at the second substrate side, a polarizing film disposed outside of the first substrate, and an optical retardation film disposed between the polarizing film and the liquid crystal cell, in which the optical retardation film has a retardation value RC, and there is the relation of formula 1 or formula 2 supposing the retardation value of the liquid crystal layer when an effective voltage Von is applied to the liquid crystal cell to be “Ron”, where: Ron+Rc=(&lgr;/4)+(&lgr;/2)×(m) Formula 1 Ron+Rc=(&lgr;/2)×(m+1), Formula 2 and where “&lgr;” is the wavelength of light, and “m” is a positive integer including 0.
摘要:
A liquid crystal display device with excellent display characteristics such as dot defects and missing of pixels prevented from occurring, a bright display screen and the like can be realized. In addition, a yield rate is enhanced remarkably. The display device has a transparent substrate, non-linear elements, each having a plurality of electrodes, disposed on the transparent substrate, a protective film disposed on each respective nonlinear element of above, an interlayer insulating film disposed on the protective film and a pixel electrode disposed on the interlayer insulating film. An opening, the cross-section of which is configured in a V-letter like slanting shape, is formed in the protective film and interlayer insulating film, respectively. The opening is exposed to the surface of the nonlinear element. Each respective opening of above forms a first end part on the protective film and a second end part on the interlayer insulating film and the first end part is located outside of the second end part. One of the plurality of electrodes disposed on the nonlinear element is in contact with the pixel electrode in the opening.
摘要:
A reflective liquid crystal display device employing only one sheet of polarizer film. An optical compensator of a hybrid tilt type having retardation rc is disposed between a liquid crystal cell and the polarizer film disposed only on one side of the liquid crystal cell. When an effective voltage von is applied to the liquid crystal cell, the retardation rc of the optical compensator is determined to accomplish the following relation: ron+rc=&lgr;/4+m·&lgr;/2(m=0, 1, 2 . . . ) Or ron+rc=(m+1)·&lgr;/2(m=0, 1, 2 . . . ) where ron is retardation of the liquid crystal layer and &lgr; is the optical wavelength. This disclosure enables the a reflective liquid crystal display device with brighter white display, higher contrast, achromatic monochrome display, and broader viewing angle to be constructed.
摘要:
A reflection type liquid crystal display device having a wide viewing angle, and capable of assuring a light utilization factor at or above a certain value for bright display even when conditions of an external light are varied is provided. The reflection type liquid crystal display device comprises (a) a liquid crystal cell comprising an upper substrate, a lower substrate and a liquid crystal layer between the substrates, (b) a polarizing film provided in a side of the upper substrate in the liquid crystal cell, (c) light reflecting means provided in a side of the lower substrate in the liquid crystal cell; and (d) an optical member provided between the polarizing film and the liquid crystal cell, and having a retardation axis when it is viewed in the normal direction. An angle between an absorption axis of the polarizing film and the retardation axis of the optical member is within a range of about 88° to about 92° or about −2° to about +2° . A retardation value in relation to the normal direction of the optical member is within a range of about 50 nm to about 500 nm.
摘要:
In a reflective liquid crystal display device with a single polarizing film and two retardation films located in between the polarizing film and liquid crystal cell, the angle of twist of nematic liquid crystal is 45°˜90°, the product of the birefringence of the liquid crystal and the thickness of the liquid crystal layer is 0.20 &mgr;m˜0.30 &mgr;m, the retardation value of the retardation film on the polarizing film side is 0.13 &mgr;m˜0.18 &mgr;m, the retardation value of the retardation film on the liquid crystal cell side is 0.13 &mgr;m˜0.18 &mgr;m, and the Z coefficient of each of two retardation films is 0.3˜1.0. This invention is featured by the following optical relations, that is, ØP 75°˜195°, ØP−ØF1, 105°˜115°, and ØP−ØF2, 165°˜175°, where ØP, ØF1 and ØF2 are angles formed by the reference line and respectively the direction of the absorption axis of the polarizing film, the direction of the slow axis of the retardation film on the polarizing film side, and the direction of the slow axis of the retardation film on the liquid crystal cell side. With the foregoing construction, a high contrast display of bright achromatic white and achromatic black is achieved.
摘要:
A reflective liquid crystal display device of the present invention has the following construction. Only one polarization film is needed. The twist angle of the nematic liquid crystal layer is set in the range of 0° to 90°. The product of the birefringence of the nematic liquid crystal layer &Dgr;nLC and the thickness of the liquid crystal layer dLC, &Dgr;nLC·dLC, is in the range of 0.35 &mgr;m to 0.50 &mgr;m. The birefringence difference, &Dgr;R=RFilm−&Dgr;nLC·dLC is in the range of −0.20 &mgr;m to 0.00 &mgr;m. When a reflective liquid crystal display device is seen from a side of a substrate positioned at the upper side, the direction of the liquid crystal which is twisted to a side of a substrate positioned at the lower side is designated as the positive direction, &phgr;LC represents an angle between the base line and the longer axis direction of the liquid crystal molecule which is positioned most closely to a first substrate, &phgr;F represents an angle between the base line and the retardation axis direction of the polymer film, &phgr;P represents an angle between the base line and the adsorption axis direction of the polarization film, &phgr;F−&phgr;LC is in the range of 70° to 110°and &phgr;P−&phgr;F is in the range of −90° to −60°.
摘要:
A reflection liquid crystal display device comprising only one polarization film, wherein the twist angle of a nematic liquid crystal ranges from 0° to 90°, the relationship between the difference between the indices of birefringence &Dgr;nLC, the thickness of the liquid crystal layer dLC, and the retardation of the phase plate RF is expressed by &Dgr;nLC.dLC=0.20 to 0.30 &mgr;m, RF-&Dgr;nLC.dLC=−0.20 to −0.05 &mgr;m; Defining the direction in which a nematic liquid crystal is twisted toward a lower substrate when viewed from above an upper substrate as positive and letting the direction of the major axis of the liquid crystal molecule the nearest to one of the upper and lower substrates be represented by &PHgr;LC, the direction of the phase lagging axis of the phase plate be represented &PHgr;F, and the direction of the absorbing or transmitting axis of the polarization film be represented by &PHgr;P, the relationship between the directions is expressed by &PHgr;F-&PHgr;LC=−40° to −25°, &PHgr;P-&PHgr;F=+50° to +80° or &PHgr;F-&PHgr;LC=+65° to 105°, &PHgr;P-&PHgr;F=−60° to −90°. Therefore, bright white can be displayed and a nonchromatic high-contrast image can be also displayed.
摘要:
A solid-state image sensing apparatus comprises a signal processing section for performing signal processing on an image signal output from a solid-state image sensing device for performing photoelectric conversion of incident light, wherein the signal processing section includes: a temporary storage section for temporarily storing the image signal; and a transmission timing adjusting section for performing the output control of a transmission timing control signal and providing the transmission timing control signal to the temporary storage section such that the image signal stored in the temporary storage section is output within a period other than an image data interval of the image signal output from the solid-state image sensing device.