Computer graphics processing and selective visual display system – Plural physical display element control system – Display elements arranged in matrix
Reexamination Certificate
2000-05-09
2004-06-15
Lao, Lun-Yi (Department: 2673)
Computer graphics processing and selective visual display system
Plural physical display element control system
Display elements arranged in matrix
C345S090000, C345S098000, C345S204000, C349S110000, C349S113000
Reexamination Certificate
active
06750836
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a technical field of a structure of a reflector-side liquid crystal panel substrate that constitutes a reflective liquid crystal panel; a liquid-crystal panel configured using the liquid crystal panel substrate; electronic equipment configured using the liquid crystal panel; and a manufacturing method for the liquid crystal panel substrate.
2. Description of Related Art
Recently, liquid-crystal panels are used as information display devices of portable apparatuses, such as portable telephones and portable information terminals. Contents of information displayed have been changed from characters and the like to a large amount of information displayed at a time. Therefore, liquid-crystal panels of a dot-matrix type are now used, and the number of pixels is proportionally increasing, thereby requiring higher duty. For these portable apparatuses, a passive-matrix liquid-crystal panel has been used. In the passive-matrix liquid-crystal panel, however, when multiplex driving is performed, selecting signals over line-scanning lines turn to be at a high duty, and a proportionally high voltage is required. This arises problems for battery-driven portable devices for which reduction in power consumption is increasingly demanded.
Under these circumstances, with Japanese Patent Application No. 10-211293, the applicant for the patent has proposed a statically-driven reflective liquid crystal panel that uses a liquid crystal panel made of a semiconductor substrate on which a memory circuit is arranged for each pixel so that display and control are performed according to data preserved in the memory circuit. This reflective liquid crystal panel does not require backlights as a light source because display is shown using light from outside reflecting, thereby allowing reduction in power consumption and allowing to be thin and light.
The reflective liquid crystal panel and the electronic equipment using the panel have well-balanced characteristics required for a display such as that contrast is high, response speeds are relatively high, driving voltage is low, and gray scale display can be easily performed. On the other hand, however, problems still remain unsolved in areas such as that theoretical viewing angles are ranged narrow, and the panel is not as yet suitable to presentation of sufficiently bright displays.
SUMMARY OF THE INVENTION
The present invention is proposed in view of the above problems. Accordingly, an object of the invention is to provide a reflective liquid crystal panel substrate that is capable of realizing high-quality reflective displays that provide a wide range of viewing angles and high brightness, a liquid crystal panel using the liquid crystal panel substrate, electronic equipment using the liquid crystal panel, and a manufacturing method for the liquid crystal panel substrate.
In order to solve the above described problems, a liquid crystal panel of the present invention may include, on a substrate, transistors, a light-shielding film connected to the transistors, reflectors connected to the light-shielding film, and a concave-convex film formed in a concave-convex condition and overlaid in regions corresponding to the reflectors via interlayer insulation films under the reflectors.
According to the liquid crystal panel substrate, corresponding to the concave-convex condition of the concave-convex film, surfaces of the reflectors (i.e., reflective surfaces) formed thereabove via the interlayer insulation films are also formed in a concave-convex condition. By this, corresponding to the level of the concave-convex condition, the scattering rate of reflecting light can be increased. As a result, with a reflective liquid crystal apparatus of a direct-view type which is formed using the reflective liquid crystal panel substrate, bright reflection display of high quality on a natural base screen having wide viewing angles can be presented according to reflectors having the most suitable reflecting characteristics that are capable of increasing the luminous intensity of light scattering in a direction perpendicular to a display screen for light that will be incident on at any angle.
In a first mode of the liquid crystal panel substrate of the present invention, as viewed in a direction perpendicular to the substrate, the light-shielding film shields light for gaps between the reflectors, and is formed of the film identical to the concave-convex film.
According to this mode, the concave-convex film is formed of, for example, an A1 film, and a light-shielding film identical thereto for shielding light for the gaps between the reflectors is formed. Therefore, with transistors arranged under the reflectors and the concave-convex film, the light-shielding film shields light which will be incident via the gaps between the reflectors, thereby allowing prevention from a condition where the abovementioned light intrudes into semiconductor layers constituting the transistors to cause light leakage. Also, by forming both the concave-convex film and the light-shielding film from the same film, an unnecessary increase in the number of layers required for the overlay structure can be avoided, thereby allowing simplification in configuration and manufacturing processing for the liquid crystal panel substrate. For reference, even with a transparent concave-convex film, as long as it is formed in a concave-convex condition, since it maintains a basic function of providing a concave-convex condition to the reflectors, advantages in increasing the scattering rate of reflecting light according to the reflectors of the present invention can be obtained.
In another mode of the liquid crystal panel substrate of the present invention, the described conductive film is formed of a first conductive film, and wiring formed of the same film as the first conductive film are provided.
According to this mode, the described concave-convex film is formed of, for example, a film such as the A1 film, and, for example, wiring such as interchange wiring for connecting the reflectors and transistors are formed of the first conductive film. That is, by forming both the concave-convex film and the wiring from the same film, an unnecessary increase in the number of layers required for the overlay structure can be avoided, thereby allowing simplification in configuration and manufacturing processing for the liquid crystal panel substrate. For reference, even with a transparent concave-convex film, as long as it is formed in a concave-convex condition, since it maintains a basic function of providing a concave-convex condition to the reflectors, advantages in increasing the scattering rate of reflecting light according to the reflectors of the present invention can be obtained.
In this mode, a configuration may be such that a different conductive film is further overlaid between the first conductive film and the substrate, wherein indented portions are created on the described concave-convex film formed of a portion of the first conductive film positioned above the different conductive film depending on existence of the different conductive film.
According to this configuration, compared to, for example, the case of a concave-convex film having through-holes simply formed on a planar film as concave sections, in which only two levels occur on a surface thereof; depending on existence of the different film positioned under the concave-convex film, three or more levels can occur on a surface of the concave-convex film. This allows an increase in the scattering rate of reflecting light. In this case, for the different conductive film, patterning may be positively performed so that small indented portions are created over the entire surface of the concave-convex film. Alternatively, patterns such as those of wiring formed of the different conductive film may be used as they are so that indented portions are created.
In another mode of the liquid crystal panel substrate of the present invention, the concave-convex film is formed in
Ishii Ryo
Katayama Shigenori
Lao Lun-Yi
Oliff & Berridg,e PLC
Seiko Epson Corporation
LandOfFree
Liquid crystal panel and manufacturing method for the same does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Liquid crystal panel and manufacturing method for the same, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Liquid crystal panel and manufacturing method for the same will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3332158