Driving method for electro-optical device, electro-optical device, and electronic apparatus
First Claim
1. A driving method for an electro-luminescent device which includes, corresponding to an intersection of a scanning line and a data line, a power line, an electro-luminescent element, a driving transistor that controls a current flowing through the electro-luminescent element, the electro-luminescent element emitting light by the current and a switching transistor that controls the driving transistor, the driving method comprising:
- a setting step of supplying a first on-signal to the switching transistor via the scanning line, and of supplying a set signal to select a conducting state or a non-conducting state of the driving transistor to the driving transistor via the data line and the switching transistor in accordance with a period for which the first on-signal is supplied;
a resetting step of supplying a second on-signal to the switching transistor via the scanning line, and of supplying a reset signal to select the non-conducting state of the driving transistor to the driving transistor via the data line and the switching transistor in accordance with a period for which the second on-signal is supplied; and
a horizontal scanning period that includes a first sub horizontal scanning period to perform the setting step and a second sub horizontal scanning period to perform the resetting step;
whereinthe period for which the first on-signal is supplied coincides with a period for which the set signal is supplied.
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Accused Products
Abstract
The invention provides a method for implementing a multi-level display of an electro-optical device according to a time ratio gray-scale method without providing reset lines. In an electro-optical device that includes, at an intersection of a scanning line and a data line, an electro-optical element, a driving transistor that drives the electro-optical element, and a switching transistor that controls the driving transistor, a gray-scale is obtained by performing a plurality of set-reset operations. Each set-reset operation includes: a setting step of supplying an on-signal to the switching transistor via the scanning line, and of supplying a set signal to select a conducting state or a non-conducting state of the driving transistor to the driving transistor via the data line and the switching transistor in accordance with the one signal; and a resetting step of supplying an on-signal to the switching transistor via the scanning line, and of supplying a reset signal to select the non-conducting state of the driving transistor to the driving transistor via the data line and the switching transistor in accordance with the one signal.
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Citations
15 Claims
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1. A driving method for an electro-luminescent device which includes, corresponding to an intersection of a scanning line and a data line, a power line, an electro-luminescent element, a driving transistor that controls a current flowing through the electro-luminescent element, the electro-luminescent element emitting light by the current and a switching transistor that controls the driving transistor, the driving method comprising:
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a setting step of supplying a first on-signal to the switching transistor via the scanning line, and of supplying a set signal to select a conducting state or a non-conducting state of the driving transistor to the driving transistor via the data line and the switching transistor in accordance with a period for which the first on-signal is supplied; a resetting step of supplying a second on-signal to the switching transistor via the scanning line, and of supplying a reset signal to select the non-conducting state of the driving transistor to the driving transistor via the data line and the switching transistor in accordance with a period for which the second on-signal is supplied; and a horizontal scanning period that includes a first sub horizontal scanning period to perform the setting step and a second sub horizontal scanning period to perform the resetting step;
whereinthe period for which the first on-signal is supplied coincides with a period for which the set signal is supplied. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 13)
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9. An electro-luminescent device, comprising:
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a scanning line; a data line; a power line; an electro-luminescent element corresponding to an intersection of the scanning line and the data line; a driving transistor that controls a current flowing through the electro-luminescent element, the electro-luminescent element emitting light by the current; a switching transistor that controls the driving transistor; a drive circuit that generates a signal to set the switching transistor to be an on-state or an off-state, and that generates a signal to set or reset the driving transistor in accordance with the signal to set the switching transistor to be the on-state or the off-state; and a horizontal scanning period that includes a first sub horizontal scanning period to perform the setting step and a second sub horizontal scanning period to perform the resetting step;
whereina period for which a first on-signal is supplied to the switching transistor coincides with a period for which the set signal is supplied. - View Dependent Claims (12)
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10. An electro-luminescent device, comprising:
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a scanning line; a data line; a power line; an electro-luminescent element corresponding to an intersection at the scanning line and the data line; a driving transistor that controls a current flowing through the electro-luminescent element, the electro-luminescent element emitting light by the current; a switching transistor that controls the driving transistor; a scanning line driver that supplies a signal to set the switching transistor to be an on-state or an on-state to the scanning line; a data line driver that supplies a signal to set or reset the driving transistor to the data line in accordance with an operation of the scanning line driver; a period of supplying the signal to reset the driving transistor via the data line within a vertical scanning period being substantially constant; and a horizontal scanning period that includes a first sub horizontal scanning period to perform the setting step and a second sub horizontal scanning period to perform the resetting step;
whereina period for which a first on-signal is supplied to the switching transistor coincides with a period for which the set signal is supplied.
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11. An electro-luminescent device, comprising:
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a scanning line; a data line; a power line; an electro-luminescent element corresponding to an intersection of the scanning line and the data line; a driving transistor that controls a current flowing through the electro-luminescent element, the electro-luminescent element emitting light by the current; a switching transistor that controls the driving transistor, an on-signal to perform a setting step of setting the electro-luminescent element and a resetting step of resetting the electro-luminescent element being supplied to the switching transistor via the scanning line; a horizontal scanning period that includes a first sub horizontal scanning period to perform the setting step and a second sub horizontal scanning period to perform the resetting step; and the number of the signal to perform the setting step and the signal to perform the resetting step being substantially the same;
whereina period for which a first on-signal is supplied to the switching transistor coincides with a period for which the set signal is supplied.
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14. A driving method for an electro-luminescent device which includes, corresponding to an intersection of a scanning line and a data line, an electro-luminescent element, a driving transistor that controls a current flowing through the electro-luminescent element, the electro-luminescent element emitting light by the current and a switching transistor that controls the driving transistor, the driving method comprising:
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a setting step of supplying a first on-signal to the switching transistor via the scanning line, and of supplying a set signal to select a conducting state or a non-conducting state of the driving transistor to the driving transistor via the data line and the switching transistor in accordance with a period for which the first on-signal is supplied; a resetting step of supplying a second on-signal to the switching transistor via the scanning line, and of supplying a reset signal to select the non-conducting state of the driving transistor to the driving transistor via the data line and the switching transistor in accordance with a period for which the second on-signal is supplied, the setting step and the resetting step forming a set-reset operation; a plurality of the set-reset operation being performed within one frame period, at least two set-reset operations of the plurality of the set-reset operation having mutually different time lengths; and a horizontal scanning period that includes a first sub horizontal scanning period to perform the setting step and a second sub horizontal scanning period to perform the resetting step;
whereinthe period for which the first on-signal is supplied coincides with a period for which the set signal is supplied.
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15. An electro-luminescent device, comprising:
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a scanning line; a data line; a power line; an electro-luminescent element corresponding to an intersection of the scanning line and the data line; a driving transistor that controls a current flowing through the electro-luminescent element, the electro-luminescent element emitting light by the current, a switching transistor that controls the driving transistor, an on-signal to perform a setting step of setting the electro-luminescent element and a resetting step of resetting the electro-luminescent element being supplied to the switching transistor via the scanning line; a horizontal scanning period that includes a first sub horizontal scanning period to perform the setting step and a second sub horizontal scanning period to perform the resetting step; and a plurality of the pairs of the setting step and the resetting step being performed within one frame period;
whereina period for which a first on-signal is supplied to the switching transistor coincides with a period for which the set signal is supplied.
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Specification