Display apparatus and drive method thereof
AssigneeCanon Kabushiki Kaisha
InventorsKouji Ikeda, Kohichi Nakamura, Masami Iseki
Life of this patent
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Abstract
A display apparatus for driving light emitting elements to emit light at a timing shifted according to the order of scanning lines, is arranged to control the light emission intensity of the light emitting element in accordance with an image signal and include a drive unit for driving the light emitting elements of the respective scanning lines in a light emission pattern including a first impulse operation period light emission pattern and a second impulse operation period light emission pattern.
Claims13
A display apparatus comprising:
- a plurality of light emitting elements arranged in a row direction and in a column direction;
- a plurality of drive circuits each provided for driving each of the light emitting elements;
- a plurality of scanning lines extending in the row direction, to which a scanning signal is applied to select the drive circuits on the row basis;
- a plurality of control lines extending in the row direction, to which a light-emission control signal is applied to determine a emission period of the light emitting elements;
- and
- a plurality of data lines extending in the column direction, to which image signals are applied to define brightness of the light emitting elements on the column basis,
- the scanning signal being sequentially applied to the scanning lines in a field so that the image signals of the data lines are programmed in the drive circuits,
- the light-emission control signal being sequentially applied to the control lines to make the light emitting elements emit light with brightness corresponding to the image data programmed to the drive circuit,
- wherein an impulse operation constituted by a high and a low levels of the light-emission control signal, which correspond to on and off of the light emission element, respectively, are repeated at least twice in different temporal patterns in the field.
A display apparatus comprising:
- light emitting elements arranged in a row direction and in a column direction;
- a drive circuit provided in each of the light emitting elements and driving the light emitting elements;
- a scanning line which is supplied with a scanning signal to select the drive circuit on the row basis;
- a control line which is supplied with a light-emission control signal to control a period during which the drive circuit drives the light emitting element;
- and
- a data line for supplying an image signal to the drive circuit arranged in the column direction,
- wherein the scanning signal is sequentially applied to the scanning line at a period of one field so that an image signal of the data line is programmed in the drive circuit, and
- wherein the light-emission control signal is applied to the control line at a timing shifted on the row basis so that the light emitting element emits light, and
- wherein a light emission pattern of the light emitting element corresponding to a waveform of the light-emission control signal in the one field includes an impulse operation period of 1/M (M:
- 1 or an integer larger than 1) of a vertical blanking period.
A display apparatus which performs impulse operation of a light emitting element in a period shifted on a scanning line basis,
- wherein a scanning period of one row is used as a unit of a driving period and one field period is not integer times of a vertical blanking period, and
- wherein the light emitting element is arranged to emit light in a first impulse operation period which is rounded to integer by rounding up or omitting a period obtained by dividing the field period by an integer obtained by rounding off a quotient obtained by dividing the one field period by the vertical blanking period, and a second impulse operation period which is longer than a period obtained by subtracting, from the first impulse operation period, a remainder obtained by dividing a field period by the first impulse operation period and which is shorter than the first impulse operation period.
A drive method of a display apparatus including light emitting elements arranged in a row direction and in a column direction, a drive circuit provided in each of the light emitting elements, which drives the light emitting elements, a scanning line which is supplied with a scanning signal to select the drive circuit on the row basis;
- a control line which is supplied with a light-emission control signal to control a period during which the drive circuit drives the light emitting element, and a data line for supplying an image signal to the drive circuit arranged in the column direction, wherein the scanning signal is sequentially applied to the scanning line in a period of one field so that an image signal of the data line is programmed in the drive circuit, and wherein the light-emission control signal is applied to the control line at a timing shifted on the row basis so that the light emitting element emits light,
- the drive method being arranged so that a light emission pattern corresponding to a waveform of the light-emission control signal in the one field includes driving the light emitting element and two different impulse operation periods.
A drive method of a display apparatus including light emitting elements arranged in a row direction and in a column direction, a drive circuit provided in each of the light emitting elements, which drives the light emitting elements, a scanning line which is supplied with a scanning signal to select the drive circuit on the row basis, a control line which is supplied with a light-emission control signal to control a period during which the drive circuit drives the light emitting element, and a data line for supplying an image signal to the drive circuit arranged in the column direction, wherein the scanning signal is sequentially applied to the scanning line at a period of one field so that an image signal of the data line is programmed in the drive circuit, and wherein the light-emission control signal is applied to the control line with a timing shifted on the row basis so that the light emitting element emits light,
- the drive method being arranged so that a light emission pattern corresponding to a waveform of the light-emission control signal in the one field includes driving the light emitting element and an impulse operation period of 1/M (M:
- 1 or an integer larger than 1) of a vertical blanking period.
Dependencies are inferred from the claim text.