Computer graphics processing and selective visual display system – Display driving control circuitry – Adjusting display pixel size or pixels per given area
Reexamination Certificate
1998-01-09
2001-12-25
Hjerpe, Richard (Department: 2774)
Computer graphics processing and selective visual display system
Display driving control circuitry
Adjusting display pixel size or pixels per given area
C345S213000, C345S182000
Reexamination Certificate
active
06333751
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a display apparatus such as a liquid crystal display, plasma display, etc., and in particular to a display device especially called a multiscanning type display apparatus, which is able to display picture signals of a plurality of signal standards.
2. Description of the Related Art
Since in a multiscanning type CRT display, etc., the size of one dot in a picture when displaying input signals is variable, it is possible to display input signals on a full screen by adequately changing the resolution regardless the signal standards of input signal.
On the other hand, in a case where input signals are displayed on a matrix drive type display device such as a plasma display panel, etc., since the size of display pixels and number of pixels of a picture screen of those display devices are fixed, there are some limitations in input signals which can be displayed in a case where the resolution of the display device is different from that of the input signals. For example, there are some types in which the input signals having the same resolution as that of the liquid crystal display device can be displayed, and input signals can be displayed as they are, with respect to only signals having any smaller resolution than that.
However, there is an inconvenience if a display device can meet only the input signals having the same resolution as that of the display device, and with a method of displaying input signals at the resolution thereof in a case where the resolution of input signals is less than that of the display device, the size of picture signals to be displayed on a display device will differ depending upon the resolution of input signals, it is not convenient.
SUMMARY OF THE INVENTION
The present invention was developed in view of the above mentioned situations, and it is therefore an object of the invention to provide a multiscanning type display apparatus which is able to display input signals at the full screen at the resolution of the display device at all times with respect to a plurality of input signals, even in a matrix drive type display device such as a liquid crystal display panel, plasma display panel, etc.
The multiscanning type display apparatus of invention has a construction comprising of a matrix drive type display device which is able to display picture signals, picture supplying means which supplies picture signals to the display device, synchronization signal supplying means which outputs synchronization signals included in the above mentioned picture signals, and resolution changing means which changes the resolution of the above mentioned picture signals to the resolution of the above mentioned display device. In multiscanning type display apparatus of the present invention, an image having the predetermined resolution obtained by the input picture signal is converted to an image having the resolution a matrix type display device.
With the above mentioned construction, it is possible to display input signals having any resolution at the full screen, matching the resolution of a display device at all times.
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An English Language abstract of JP 8-137444.
An English Language abstract of JP 7-199855.
An English Language abstract of JP 8-166776.
Copy of an English Language Abstract of JP No. 9-247574.
Copy of an English Language Abstract of JP No. 9-247588.
Shindo Yoshikuni
Torii Hiromitsu
Yui Hirokatsu
Dinh Duc Q
Greenblum & Bernstein P.L.C.
Hjerpe Richard
Matsushita Electric - Industrial Co., Ltd.
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