Image display apparatus
AssigneeCanon Kabushiki Kaisha
InventorsOsamu Sagano, Hiroshi Saito
Life of this patent
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Abstract
An image display apparatus includes scanning circuits for sequentially selecting and scanning row wirings, a modulation circuit for outputting a modulated signal to be applied to column wirings, and a voltage drop compensation means for calculating corrected image data for reducing the influence of voltage drops due to at least resistance components of the row wirings, with respect to image data. The modulated signal is a pulse-width modulated voltage signal having a plurality of voltage amplitude values, and the modulation circuit outputs a modulated signal in which a pulse width and/or a voltage amplitude value of the modulated signal are expanded on the basis of the corrected image data.
Claims5
An image display apparatus comprising:
- image display devices arranged in matrix form, driven via a plurality of row wirings and column wirings, and used for forming an image;
- scanning means for sequentially selecting and scanning the row wirings;
- modulation means for outputting a modulated signal to be applied to the column wirings;
- and
- voltage drop compensation means for calculating corrected image data for reducing an influence of voltage drops due to at least resistance components of the row wirings, with respect to image data,
- wherein the modulated signal is a pulse-width modulated voltage signal having a plurality of voltage amplitude values,
- the modulation means output a modulated signal in which a pulse width and/or a voltage amplitude value of the modulated signal are expanded on the basis of the corrected image data.
Dependencies are inferred from the claim text.