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Display control apparatus and method and display apparatus
| Details |
Inventors: Suga, Kazumi; Shibamiya, Yoshikazu; Nakajima, Tatsuya; Inoue, Kenji; Sawada, Masayuki;
Assignee: Canon Kabushiki Kaisha (Tokyo, JP)
Primary Examiner: Lao; Lun-Yi
Assistant Examiner:
Attorney, Agent or Firm: Fitzpatrick, Cella, Harper & Scinto
A display control apparatus having a plurality of different display modes for displaying a plurality of types of image signals corresponding to different resolutions and dot clocks, includes a discrimination circuit for displaying the display mode of the currently displayed image signal, and a selection circuit for selecting on-screen display data to be displayed on the basis of the display mode discriminated by the discrimination circuit. In addition, an input circuit inputs the on-screen display data selected by the selection circuit in place of the currently displayed image data, and an output circuit outputs the on-screen display data input by the input circuit in the display mode of the image signal. |
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DETAILED DESCRIPTION The present invention has been made in consideration of the above-mentioned problems, and has as its object to provide a display control method and apparatus, and a display apparatus, which can appropriately display OSD data in correspondence with display states with different image resolutions and dot clocks.
In order to achieve the above object, a display control apparatus according to an embodiment of the present invention comprises the following arrangement.
That is, there is provided a display control apparatus having a plurality of different display modes for displaying a plurality of types of image signals corresponding to different resolutions and dot clocks, comprising: discrimination means for displaying a display mode of a currently displayed image signal; selection means for selecting OSD data to be displayed on the basis of the display mode discriminated by the discrimination means; input means for inputting the OSD data selected by the selection means in place of the currently displayed image data; and output means for outputting the OSD data input by the input means in the display mode of the image signal.
Preferably, the OSD data has font sizes and shapes corresponding to respective display modes, and the selection means selects the OSD data so as to obtain an appropriate character size and shape in each display mode.
In this manner, driving condition differences in various display modes can be absorbed, and the OSD data can be stably displayed.
Preferably, the font size and shape are determined on the basis of a dot clock speed in each display mode and an input speed of the OSD data by the input means.
In this manner, even when the image of the OSD data is enlarged or reduced in size in correspondence with dot clock differences of the display modes, OSD data having a font size and shape corresponding to the enlarged or reduced size is used to maintain a desired size and shape.
Preferably, the OSD data has display contents corresponding to respective display modes, and the selection means selects the OSD data having appropriate display contents in each display mode
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Television 
