315results about How to "Improve viewing angle characteristics" patented technology

An organic EL display device includes an organic EL section including an organic layer held between a first electrode and a second electrode, one of the two electrodes serving as a reflective electrode, and the other serving as a translucent electrode; a blue pixel portion including a blue color filter configured to mainly transmit a light component in a blue wavelength region of light emitted from the organic EL section; a green pixel portion including a green color filter configured to mainly transmit a light component in a green wavelength region of the light emitted from the organic EL section; and a red pixel portion including a wavelength conversion layer configured to absorb at least one of the light component in the blue wavelength region and the light component in the green wavelength region of the light emitted from the organic EL section and emit light in a red wavelength region.

The invention has an object to provide a liquid crystal display device of an excellent viewing angle characteristic and high brightness, including: sandwiching liquid crystals containing polymerizable monomers between a first substrate with a pixel electrode having a micro slit and a second substrate facing the first substrate; polymerizing the monomers with voltage applied to the liquid crystals; and controlling an alignment orientation of the liquid crystals to a direction of extending the micro slit, wherein the pixel electrode includes: a direct coupling part electrically connected to a switching element; a capacitive coupling part electrically insulated from the switching element, and forming capacitance with a control capacitance electrode having a same potential as that of a source electrode of the switching element; and a space between the direct and capacitive coupling parts, wherein directions of extending the micro slit in the adjacent direct and capacitive coupling parts are orthogonal to each other.

A display element has a arrangement that allows the pixel to have at least two domains in which the medium shows optical anisotropies of different directions when a force (for example, an electric field) is applied or when no force is applied. It is preferable that directions of the optical anisotropies occurred in the respective domains when the electric field is applied respectively have 45 degrees±10 degrees with absorption axes of polarizers, and that the directions of the optical anisotropies occurred in the respective domains when the electric field is applied make 90 degrees±20 degrees.

An active matrix display device which can easily improve the viewing angle characteristics. In the active matrix display device where light is emitted in the direction of a substrate over which thin film transistors are formed, when focusing on the multiple interference caused by the light emitted from a light-emitting element, which is reflected on the film used for forming the thin film transistors, effect on the multiple interference can be drastically reduced by forming the reflecting film to have the substantial optical thickness of λ / 2, without losing the function of the thin film transistor.

A circularly polarizing plate includes a λ / 4 phase difference plate and a linearly polarizing plate overlaid on a main surface of the λ / 4 phase difference plate and having an absorption axis forming an angle of about 45° with respect to a lagging axis of the λ / 4 phase difference plate. The λ / 4 phase difference plate has reverse wavelength dispersion characteristics and an Nz coefficient of 1.6 or more. Employment of this structure can provide the circularly polarizing plate having good view angle characteristics and a vertical alignment type of liquid crystal display panel having the same.

An organic EL device (2) and an sealing layer (3) are formed on a supporting substrate (1). The top surface (31) of the sealing layer is made repellent to ink. Ink is printed by an ink jet method to form a coloring layer (4). A flattening layer (8) is formed, and thereafter a sealing substrate (5) is bonded. Since the coloring layer (4) is not previously formed on the sealing substrate (5), no precise positioning for bonding the sealing substrate (5) to the supporting substrate (1) is needed. The viewing angle properties are enhanced since the distance between the organic EL device (2) and the coloring layer (4) can be small. Thus, there are provided an organic EL display of top emission type with a high production yield and excellent viewing angle properties and its production method.

An object of the invention is to provide a liquid crystal display device with an improved viewing angle characteristic. The liquid crystal display device comprising: a pair of polarizing layers disposed so that respective absorption axes thereof are orthogonal to each other; a liquid crystal cell comprising: a first substrate and a second substrate being disposed so that they face each other between the pair of the polarizing layers, at least one of which has a transparent electrode, and a liquid crystal layer disposed between the first substrate and the second substrate; and a retardation layer disposed between at least one of the pair of the polarizing layers and the liquid crystal cell, wherein an in-plane slow axis of the retardation layer is within the direction of 90+-40 degrees relative to to an absorption axis of the polarizing layer disposed at a closer position to the retardation layer; Re(550) meets following relation, 25 nm<=Re(550)<=230 nm; R[40 DEG ] of the retardation layer which is measured for incident light in a direction tilted by 40 degrees toward the tilt direction of the retardation layer relative to the normal line of the retardation layer meets following relation, 0 nm<=R[40 DEG ]<=300 nm; and R[+40 DEG ] of the retardation layer and retardation R[-40 DEG ] of the retardation layer meet following relation, 1<R[+40 DEG ] / R[-40 DEG ].

A method of producing a cellulose derivative film, the method comprising: forming a film with a solvent cast method from a dope including a cellulose derivative satisfying following conditions (a) and (b): (a) at least one among three hydroxyl groups included in a glucose unit of cellulose is substituted by a substituent of which a polarizability anisotropy Δα represented as following Expression (1) is 2.5×10−24 cm3 or higher: Expression (1): Δα=αx−(αy+αz) / 2, wherein αx, αy and αz is as defined in the specification; and (b) when a substitution degree by a substituent of which Δα is 2.5×10−24 cm3 or higher is PA, and a substitution degree by a substituent of which Δα is lower than 2.5×10−24 cm3 is PB, the PA and PB satisfy following Expressions (3) and (4): Expression (3): 2PA+PB>3.0; and Expression (4): PA>0.2.

A liquid crystal device (100A) according to the present invention has first and second pixels (P1 and P2). Each of the first and second pixels (P1 and P2) includes first, second and third subpixels (R, G, and B). When the input signal indicates that each pixel should represent the first color, the luminances of the respective third subpixels (B1 and B2) of the first and second pixels (P1 and P2) are different from each other. But when the input signal indicates that each pixel should represent the second color, the average luminance of the respective third subpixels (B1 and B2) is substantially the same as when the first color is specified, and the luminances of the respective third subpixels (B1 and B2) are substantially equal to each other.

A transverse electric field mode liquid crystal display device capable of improving the viewing angle characteristic in black display at an oblique viewing angle with a simple structure is provided. In the liquid crystal display device in accordance with one aspect of the present invention, (a) the product (ΔA·d) of the thickness d of the liquid crystal layer sandwiched between a pair of substrates and the refractive index anisotropy Δn of the liquid crystal layer is within the range of 320 nm±20 nm, (b) each of the pair of polarizing plates is composed of a polarizer and transparent protective films sandwiching the polarizer therebetween, and the polarizing plate and the substrate are directly stuck together without any retardation film or optical compensation layer interposed therebetween, (c) the delay phase axis of the transparent protective film that protects the liquid crystal layer side is generally parallel with the absorption axis of the polarizer in each of the pair of polarizing plates, and (d) the in-plane retardation Re is equal to or less than 10 nm, and the retardation in thickness direction Rth is no less than 30 nm and no greater than 40 nm for the transparent protective film that protects the liquid crystal layer side in each of the pair of polarizing plates.

A vertical alignment liquid crystal panel based on a transverse electric field drive system is provided which shows few changes in color when looked squarely at. A liquid crystal panel (2) is a vertical alignment liquid crystal panel based on a transverse electric field drive system, which carries out a display by driving, with a transverse electric field, a liquid crystal layer (50) sandwiched between substrates (10, 20), and the substrate (10) is provided with an insulating layer (25) having at least two regions that are different in relative permittivity from each other in a pixel (6) composed of a red subpixel (6R), a green subpixel (6G), and a blue subpixel (6B). Those regions of the insulating layer (25) which correspond to the blue, green, and red subpixel (6B, 6G, 6R) in the liquid crystal panel (2) have relative permittivities of 3, 3 to 7, and 4 to 7, respectively.

The invention belongs to the display technology field and especially relates to a display substrate and a display device. The display substrate comprises a plurality of pixels which are arranged in anarray mode. Each pixel comprises an organic electroluminescence device used for emitting different colored light. The organic electroluminescence device at least comprises an anode, a cathode, and alight emitting layer between the anode and the cathode. The organic electroluminescence devices possessing a same colored light in the adjacent pixels have microcavities with different optical lengths. And / or, the organic electroluminescence device with at least one monochromatic light in the same pixel has the microcavities with the different optical lengths. By using the display substrate, through adjusting the optical lengths of the microcavities, a large visual angle brightness problem is solved.

A liquid crystal display having a wide viewing angle and easily manufactured. The liquid crystal display comprises an upper substrate and a lower substrate, and a liquid crystal material disposed between the upper substrate and the lower substrate. The liquid crystal display has a conductive protrusion disposed on the surface of the upper substrate opposing to the lower substrate. The conductive protrusion is disposed over a scanning electrode line or a signal electrode line and has the same potential as that of the upper electrode. As another structure, each of pixel electrodes on the lower substrate has a smaller area than that of a common electrode on the upper substrate and is covered by the common electrode, and each of the pixel electrodes comprises an electrode portion having approximately symmetrical shape.

The invention relates to a liquid crystal display used in a television receiver or a display section of an electronic apparatus and provides a liquid crystal display having a wide viewing angle and high viewing angle characteristics. The viewing angle characteristics of low gradations are improved by the capacitive coupling HT method. The viewing angle characteristics of high gradations above the intermediate gradation are improved by the driving HT method. A liquid crystal is driven using the capacitive coupling HT method and the driving HT method in combination to combine the effect of improvement of both methods, thereby improving the viewing angle characteristics of a liquid crystal display for a wide range from a low gradation to a high gradation.