Computer graphics processing and selective visual display system – Display driving control circuitry – Controlling the condition of display elements
Reexamination Certificate
1999-06-09
2001-10-23
Faile, Andrew (Department: 2611)
Computer graphics processing and selective visual display system
Display driving control circuitry
Controlling the condition of display elements
C345S182000, C345S182000, C348S581000, C348S583000
Reexamination Certificate
active
06307575
ABSTRACT:
BACKGROUND OF THE INVENTION
(a) Field of the Invention
The present invention relates to a display unit having a screen adjustment function and, more particularly, to a display unit having a screen adjustment function for enlarging/reducing the effective size and moving the effective area of the screen of the display unit.
Display units having an on-screen-display (OSD) function are used in recent days, wherein desired characters and/or patterns are additionally displayed on a desired location of the screen of the display unit while superimposed with a main image. In a conventional display unit with or without an OSD function, when the display unit is subjected to an initial screen adjustment, an increase or decrease in numerical values or an expansion or contraction in bar charts are generally used for showing the amount of operation upon depression of a dedicated push button for enlargement/reduction or movement of the effective screen area in the vertical or horizontal directions.
In the initial screen adjustment, the intensity (brightness) control for the display unit is effected substantially without any dissatisfaction of the operator due to the feasibility of observation of amount of the operation on the screen simply by observing the screen. On the other hand, the movement or enlargement/reduction of the effective screen area in the initial screen adjustment generates dissatisfaction by the operator because the amount of operation represented by the numerical value does not effectively provide perception of the amount of operation for the enlargement etc.
SUMMARY OF THE INVENTION
It is therefore an object of the present invention to provide a display unit which is capable of providing excellent perception of the amount of enlargement/reduction or movement operation during a screen adjustment of the display unit by using a known OSD function for this purpose.
The present invention provides a display unit including a screen for displaying an image on an effective screen area of the screen, a screen adjustment block for adjusting the effective screen area on the screen, and an on-screen-display (OSD) control block for displaying an OSD pattern on the screen, the OSD control block controlling the OSD pattern by responding to adjustment of effective screen area by the screen adjustment block.
In accordance with the display unit of the present invention, the amount of movement or enlargement/reduction of the screen area in a screen adjustment can be easily observed or perceived by the movement or enlargement/reduction of the OSD pattern, thereby providing useful information for the screen adjustment.
The above and other objects, features and advantages of the present invention will be more apparent from the following description, referring to the accompanying drawings.
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Faile Andrew
Foley & Lardner
NEC Corporation
Vu Ngoc
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