Computer graphics processing and selective visual display system – Display peripheral interface input device – Light pen for fluid matrix display panel
Reexamination Certificate
1998-10-13
2001-07-24
Luu, Matthew (Department: 2672)
Computer graphics processing and selective visual display system
Display peripheral interface input device
Light pen for fluid matrix display panel
C345S428000, C358S001130
Reexamination Certificate
active
06266042
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a display system, and more particularly, to supply of an image signal to a display device.
2. Description of the Related Art
Resolution of printers has improved year by year, and resolutions of 300-700 dpi (dots per inch) are now common. Some printers can even perform printing in a resolution of about 1,200 dpi. On the other hand, the current resolution in displays for computers remains on the order of 80-100 dpi, and is therefore much inferior to the resolution of printers. In order to save resources and reduce consumption of paper despite an increase of electronic information caused in part by the development of the Internet, displays having higher resolution are desired.
Ferroelectric liquid crystal displays (hereinafter abbreviated as “FLCDs”) using ferroelectric liquid crystals (hereinafter abbreviated as “FLCs”) can be used as high resolution displays. In contrast to other liquid crystal displays, FLCDs have a “memory capability”. The memory capability of the FLCD causes a liquid crystal to hold a display state obtained by applying an electric field thereto. In a display using an FLC, thanks to such memory capability, the contrast is not degraded no matter how many scanning lines are used, so that a high-definition image can be displayed even with a simple matrix structure. Hence, such a display is attracting attention for implementing a next-generation of high-resolution displays.
It may be possible to adapt conventional display system hardware to a high-resolution display. However, since conventional display systems are not designed for high-resolution displays, the following problems arise.
1. New graphic chips and display drivers corresponding to the high resolution are required.
2. In the current mainstream window systems, such as Windows (a registered trade-mark of Microsoft Corp.), the sizes of standard display fonts and icons are designed assuming that they will be displayed at a resolution on the order of 80-100 dpi. Hence, these fonts and icons would be displayed with smaller sizes on a display having a higher resolution.
If a new dedicated high resolution window based system were to be constructed, such problems would not arise even if conventional display configuration were to be used. However, since such a system would generally be expensive and incompatible with conventional systems and software, users may not accept such a system.
SUMMARY OF THE INVENTION
It is an object of the present invention to solve the above-described problems.
It is another object of the present invention to allow to easily display a high-resolution image without newly constructing a system for high resolution.
According to one aspect of the present invention, a display system includes a display apparatus and a transmission apparatus. The display apparatus includes receiving means for receiving second resolution image data, resolution conversion means for converting the second resolution data to first resolution image data, a memory capable of storing the first resolution image data, and a display panel capable of displaying an image at the first resolution. The transmission apparatus transmits first image data representing the image having the first resolution and second image data representing an image having a second resolution lower than the first resolution to the display apparatus. The system has a first mode in which the transmission apparatus divides the first image data into a plurality of sub-areas so that a resolution in one sub-area is lower than a predetermined resolution, and transmits image data for each of the plurality of sub-areas to the display apparatus in sequence, and the display apparatus combines the image data transmitted from the transmission apparatus using the memory, and displays the image having the first resolution represented by the combined image data, and a second mode in which the transmission apparatus transmits the second image data, and the display apparatus converts the resolution of the second image data transmitted from the transmission apparatus into first resolution data using the resolution conversion means and displays the image having the first resolution using the display panel, based on the first resolution data.
According to another aspect of the present invention, an apparatus includes division means and transmission means. The division means divides data representing a first image having the first resolution into a plurality of lower resolution sub-areas. The transmission means transmits image data for each of the plurality of sub-areas generated by the division means to the display apparatus in sequence. The display apparatus regenerates the first image having the first resolution by combining the image data for each of the plurality of sub-areas transmitted from the transmission means.
According to still another aspect of the present invention, a display apparatus for displaying an image with a first resolution is provided. The display apparatus inputs second resolution image data for each of a plurality of sub-areas in sequence. The second resolution is lower than the first resolution. The display apparatus combines the image data for the plurality of sub-areas into combined image data with the first resolution, and displays an image represented by the combined image data with the first resolution.
According to yet another aspect of the present invention, a transmission apparatus for transmitting an image signal to a display apparatus capable of displaying an image having a first resolution is provided. The transmission apparatus divides first image data having the first resolution into a plurality of sub-areas so that a resolution in one sub-area is lower than a predetermined resolution, and transmits the first image data divided into the plurality of sub-areas to the display apparatus in sub-area units. The display apparatus regenerates the first image data having the first resolution by combining the first image data transmitted to the display apparatus after being divided into sub-areas.
The foregoing and other objects, advantages and features of the present invention will become more apparent from the following detailed description of the preferred embodiments taken in conjunction with the accompanying drawings.
REFERENCES:
patent: 5612715 (1997-03-01), Karaki et al.
patent: 5686960 (1997-11-01), Sussman et al.
patent: 5689343 (1997-11-01), Loce et al.
patent: 6028585 (2000-02-01), Ishii et al.
patent: 6052486 (2000-04-01), Knowlton et al.
Canon Kabushiki Kaisha
Fitzpatrick ,Cella, Harper & Scinto
Havan Thu-Thao
Luu Matthew
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