323results about How to "Improve viewing angle characteristics" patented technology

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.

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 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.