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US 7,009,627 B2Granted
Display apparatus, and image signal processing apparatus and drive control apparatus for the same
AssigneeCanon Kabushiki Kaisha
InventorsNaoto Abe, Kohei Inamura, Osamu Sagano, Hiroshi Saito, Takeshi Ikeda
Life of this patent
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Abstract
A display apparatus includes a display panel having display devices arranged in a matrix layout and driven through a plurality of row wirings and column wirings, a scanning unit to scan the row wirings, and a modulation unit to supply a modulation signal to the column wirings. A compensation unit applies compensation processing to compensate for fluctuation of display luminance due to the influence of voltage drop caused by a resistance of the row wiring to the image data, and a luminance control unit controls display luminance of the display panel based upon luminance information of the image data.
Claims6
A display apparatus comprising:
- a display panel having display devices which are arranged in a matrix layout and driven through a plurality of row wirings and column wirings;
- a scanning unit adapted to scan the row wirings;
- a modulation unit adapted to supply a modulation signal to the colunm wirings based upon image data;
- a compensation unit adapted to apply compensation processing, for compensating at least fluctuation of display luminance due to influence of voltage drop caused by a resistance of the row wirings, to the image data;
- a luminance control unit adapted to control display luminance of the display panel, based upon luminance information of the image data;
- and
- a coefficient calculation unit adapted to determine a coefficient for maintaining a width of the image data after the compensation processing within a predetermined range,
- wherein the luminance control unit changes the display luminance of the display panel in accordance with the coefficient and the luminance information.
5 more elements
A display apparatus comprising:
- a display panel having display devices which are arranged in a matrix layout and driven through a plurality of row wirings and column wirings;
- a scanning unit adapted to scan the row wirings;
- a modulation unit adapted to supply a modulation signal to the column wirings based upon image data;
- a compensation unit adapted to apply compensation processing, for compensating at least fluctuation of display luminance due to influence of voltage drop caused by a resistance of the row wirings, to the image data;
- a luminance control unit adapted to control display luminance of the display panel, based upon luminance information of the image data;
- and
- a coefficient calculation unit adapted to determine a coefficient for maintaining a width of the image data after the compensation processing within a predetermined range,
- wherein the luminance control unit compares a value which is obtained from the coefficient and the luminance information with a predetermined luminance limitation reference value, and based upon its comparison result, changes a luminance level of the image data after the compensation processing.
5 more elements
A display apparatus comprising:
- a display panel having display devices which are arranged in a matrix layout and driven through a plurality of row wirings and column wirings, the display panel having a common anode electrode;
- a scanning unit adapted to scan the row wirings;
- a modulation unit adapted to supply a modulation signal to the column wirings based upon image data;
- a compensation unit adapted to apply compensation processing, for compensating at least fluctuation of display luminance due to influence of voltage drop caused by a resistance of the row wirings, to the image data;
- a luminance control unit adapted to control display luminance of the display panel, based upon luminance information of the image data;
- and
- a coefficient calculation unit adapted to determine a coefficient for maintaining a width of the image data after the compensation processing within a predetermined range,
- wherein, from an integration value of the image data and the coefficient, a value corresponding to a current value flowing through the anode electrode is calculated, and the value calculated is compared with a predetermined luminance limitation reference value, and based upon its comparison result, the display luminance of the display panel is changed.
5 more elements
A display apparatus comprising:
- a display panel having display devices which are arranged in a matrix layout and driven through a plurality of row wirings and column wirings;
- a scanning unit adapted to scan the row wirings;
- a modulation unit adapted to supply a modulation signal to the column wirings based upon input image data;
- a common anode electrode facing the display devices;
- a compensation unit adapted to apply compensation processing, for compensating at least fluctuation of display luminance due to influence of voltage drop caused by a resistance of the row wirings, to the image data;
- a coefficient calculation unit adapted to determine a coefficient for maintaining a width of the image data after the compensation processing within a predetermined range;
- and
- a current value calculation unit adapted to calculate a value corresponding to a current value flowing through the anode electrode from a result of multiplying an integration value of the image data with the coefficient.
5 more elements
Dependencies are inferred from the claim text.