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US 2003/0169250 A1Published application
Signal line driver circuit, light emitting device and driving method thereof
AssigneeSemiconductor Energy Laboratory Co., Ltd.
InventorHajime Kimura
Life of this patent
Estimating the term…
Abstract
Variation occurs in transistor characteristics. The present invention relates to a signal line driver circuit comprising a plurality of current source circuits respectively corresponding to a plurality of wirings, characterized in that: the plurality of current source circuits each comprise capacitor means and supply means; and the plurality of current source circuits each convert a supplied current into a voltage in accordance with a video signal, and supply a current corresponding to the converted voltage.
Claims32
A signal line driver circuit comprising a plurality of current source circuits corresponding to a plurality of wirings, characterized in that:
- the plurality of current source circuits each comprise capacitor means and supply means;
- and
- the plurality of current source circuits each convert a supplied current to a voltage in accordance with a video signal, and supply a current corresponding to the converted voltage.
A signal line driver circuit comprising a plurality of current source circuits corresponding to a plurality of wirings, characterized in that:
- two current source circuits each comprising capacitor means and supply means are disposed for each wiring;
- and
- one of the two current source circuits converts a supplied current to a voltage in accordance with a video signal, and the other current source circuit supplies a current corresponding to the converted voltage.
A signal line driver circuit comprising a plurality of current source circuits corresponding to a plurality of wirings, characterized in that:
- n current source circuits (n is a natural number equal to or larger than 2) each comprising capacitor means and supply means are disposed for each wiring;
- and
- the n current source circuits each convert a supplied current to a voltage in accordance with a video signal, and supply a current corresponding to the converted voltage.
A method of driving a light emitting device which is provided with:
- a pixel portion in which a plurality of scanning lines, a plurality of wirings, and a plurality of pixels are disposed in matrix;
- and a signal line driver circuit comprising a plurality of current source circuits respectively corresponding to the plurality of wirings, the plurality of pixels each comprising a light emitting element, a driving transistor, and a capacitor element for retaining a gate-source voltage of the driving transistor, characterized in that:
- one frame period comprises a plurality of subframe periods;
- the plurality of subframe periods each comprise an address period and a lightening period;
- a setting period and a setting operation period are provided in the period during which any one of the plurality of scanning lines is not selected in the lightening period;
- in the setting period, m current source circuits (m is a natural number equal to or larger than 1) among the plurality of current source circuits are specified in accordance with a video signal;
- and
- in the setting operation period, the specified m current source circuits each convert a supplied current into a voltage in accordance with the video signal, and supply a current corresponding to the converted voltage.
5 more elements
A method of driving a light emitting device which is provided with:
- a pixel portion in which a plurality of scanning lines, a plurality of wirings, and a plurality of pixels are disposed in matrix;
- and a signal line driver circuit comprising a plurality of current source circuits respectively corresponding to the plurality of wirings, the plurality of pixels each comprising a light emitting element, a driving transistor, and a capacitor element for retaining a gate-source voltage of the driving transistor, characterized in that:
- one frame period comprises a plurality of subframe periods;
- each of the plurality of subframe periods each comprise an address period and a lightening period;
- a setting period and a setting operation period are provided in the period during which any one of the plurality of scanning lines is not selected in the lightening period;
- in the setting period, m current source circuits (m represents a natural number equal to or larger than 1) among the plurality of current source circuits are specified in accordance with a video signal;
- and
- in the address period and the setting operation period, the specified m current source circuits each convert a supplied current into a voltage in accordance with the video signal, and supply a current corresponding to the converted voltage.
5 more elements
A method of driving a light emitting device which is provided with:
- a pixel portion in which a plurality of scanning lines, a plurality of wirings, and a plurality of pixels are disposed in matrix;
- and a signal line driver circuit comprising a plurality of current source circuits respectively corresponding to the plurality of wirings, the plurality of pixels each comprising a light emitting element, a current source circuit, and a switch for controlling conductivity between the light emitting element and the current source circuit, characterized in that:
- one frame period comprises a plurality of subframe periods;
- the plurality of subframe periods each comprises an address period and a lightening period;
- a setting period and first and second setting operation periods are provided in the period during which any one of the plurality of scanning lines is not selected in the lightening period;
- in the setting period, m current source circuits (m represents a natural number equal to or larger than 1) among the plurality of current source circuits are specified in accordance with a video signal;
- in the first setting operation period, the specified m current source circuits each convert a supplied current into a voltage according to the video signal, and supplies a current corresponding to the converted voltage;
- and
- in the second setting operation period, the current source circuit disposed in the pixel converts a supplied current into a voltage, and supplies a current corresponding to the converted voltage.
6 more elements
A method of driving a light emitting device which is provided with:
- a pixel portion in which a plurality of scanning lines, a plurality of wirings, and a plurality of pixels are disposed in matrix;
- and a signal line driver circuit comprising a plurality of current source circuits respectively corresponding to the plurality of wirings, the plurality of pixels each comprising a light emitting element, a current source circuit, and a switch for controlling conductivity between the light emitting element and the current source circuit, characterized in that:
- one frame period comprises a setting period and a first setting operation period;
- in the setting period, m current source circuits (m is a natural number equal to or larger than 1) among the plurality of current source circuits are specified in accordance with a video signal;
- in the first setting operation period, the specified m current source circuits each convert a supplied current into a voltage according to the video signal, and supplies a current corresponding to the converted voltage;
- the period obtained by adding the setting period to the first setting operation period corresponds to a second setting period;
- and
- in the second setting operation period, the current source circuit disposed in the pixel converts a supplied current into a voltage, and supplies a current corresponding to the converted voltage.
5 more elements
A method of driving a light emitting device which is provided with:
- a pixel portion in which a plurality of scanning lines, a plurality of wirings, and a plurality of pixels are disposed in matrix;
- and a signal line driver circuit comprising a plurality of current source circuits respectively corresponding to the plurality of wirings;
- the plurality of pixels each comprising a light emitting element, characterized in that:
- one frame period comprises a plurality of horizontal scanning periods;
- the plurality of horizontal scanning periods each comprise a setting period and a setting operation period;
- in the setting period, m current source circuits among the plurality of current source circuits are specified in accordance with a video signal;
- and
- in the setting operation period, the specified m current source circuits each convert a supplied current into a voltage in accordance with the video signal, and supplies a current corresponding to the converted voltage.
5 more elements
A method of driving a light emitting device which is provided with:
- a pixel portion in which a plurality of scanning lines, a plurality of wirings, and a plurality of pixels are disposed in matrix;
- and a signal line driver circuit comprising a plurality of current source circuits respectively corresponding to the plurality of wirings;
- the plurality of pixels each comprising a light emitting element, characterized in that:
- one frame period comprises a plurality of horizontal scanning periods;
- x horizontal scanning periods (x is a natural number equal to or larger than 1) selected from the plurality of horizontal scanning periods each comprise a setting period and a setting operation period;
- in the setting period, m current source circuits among the plurality of current source circuits are specified in accordance with a video signal;
- and
- in the setting operation period, the specified m current source circuits each convert a supplied current into a voltage in accordance with the video signal, and supplies a current corresponding to the converted voltage.
5 more elements
Dependencies are inferred from the claim text.