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US 2003/0117388 A1Published application
Display device and electric equipment using the same
AssigneeSemiconductor Energy Laboratory Co., Ltd.
InventorJun Koyama
Life of this patent
Estimating the term…
Abstract
A power source for EL driving is built in an active matrix type EL display device, and the number of power sources externally attached is reduced. Therefore, the power source for EL driving is constructed by a transistor formed on a substrate, and its output circuit is constructed by a p-channel transistor of a source ground when the anode of an OLED is operated. Thus, the electric potential difference between a power voltage and an output voltage is reduced, and a power source circuit of small electric power consumption is constructed.
Claims52
A display device comprising:
- a plurality of pixels;
- a plurality of source signal lines and a plurality of gate signal lines arranged in a matrix shape over a substrate;
- a plurality of light emitting elements provided at each of the plurality of pixels, each of the light emitting elements comprising at least one light emitting layer comprising an organic material;
- and
- a power source circuit over the substrate for applying at least one of an electric current and a voltage to the light emitting elements.
2 more elements
A display device comprising:
- a plurality of pixels;
- a plurality of source signal lines and a plurality of gate signal lines arranged in a matrix shape over a substrate;
- a plurality of light emitting elements provided at each of the plurality of pixels, each of the light emitting elements comprising at least one light emitting layer comprising an organic material for emitting light of a color selected from the group consisting of red, green and blue;
- a first power source circuit over the substrate for applying at least one of an electric current and a voltage to the light emitting elements for emitting red light;
- a second power source circuit over the substrate for applying at least one of an electric current and a voltage to the light emitting elements for emitting green light;
- and
- a third power source circuit over the substrate for applying at least one of an electric current and a voltage to the light emitting elements for emitting blue light.
4 more elements
A display device comprising:
- a plurality of pixels;
- a plurality of source signal lines and a plurality of gate signal lines arranged in a matrix shape over a substrate;
- a plurality of light emitting elements provided at each of the plurality of pixels, each of the light emitting elements comprising at least one light emitting layer comprising an organic material;
- and
- a power source circuit using an operational amplifier over the substrate for applying at least one of an electric current and a voltage to the light emitting elements.
2 more elements
A display device comprising:
- a plurality of pixels;
- a plurality of source signal lines and a plurality of gate signal lines arranged in a matrix shape over a substrate;
- a plurality of light emitting elements provided at each of the plurality of pixels, each of the light emitting elements comprising at least one light emitting layer comprising an organic material for emitting a color selected from the group consisting of red, green and blue;
- a first power source circuit using an operational amplifier over the substrate for applying at least one of an electric current and a voltage to the light emitting elements for emitting red color;
- a second power source circuit using an operational amplifier over the substrate for applying at least one of an electric current and a voltage to the light emitting elements for emitting green color;
- and
- a third power source circuit using an operational amplifier over the substrate for applying at least one of an electric current and a voltage to the light emitting elements for emitting blue color.
4 more elements
A display device comprising:
- a plurality of pixels;
- a plurality of source signal lines and a plurality of gate signal lines arranged in a matrix shape over a substrate;
- a plurality of light emitting elements provided at each of the plurality of pixels, each of the light emitting elements comprising at least one light emitting layer comprising an organic material for emitting light of a color selected from the group consisting of red, green and blue;
- a first power source circuit over the substrate for applying at least one of an electric current and a voltage to the light emitting elements for emitting light of a color selected from the group consisting of red, green and blue, and
- a second power source circuit over the substrate for applying at least one of an electric current and a voltage to the light emitting elements for emitting light of a color selected from the group consisting of red, green and blue,
- wherein the second power source circuit is applied to the light emitting elements for emitting light of a color other than that of the first power source circuit.
3 more elements
A display device comprising:
- a plurality of pixels;
- a plurality of source signal lines and a plurality of gate signal lines arranged in a matrix shape over a substrate;
- a plurality of light emitting elements provided at each of the plurality of pixels, each of the light emitting elements comprising at least one light emitting layer comprising an organic material for emitting light of a color selected from the group consisting of red, green and blue;
- a first power source circuit using an operational amplifier over the substrate for applying at least one of an electric current and a voltage to the light emitting elements for emitting light of a color selected from the group consisting of red, green and blue;
- and
- a second power source circuit using an operational amplifier over the substrate for applying at least one of an electric current and a voltage to the light emitting elements for emitting light of a color selected from the group consisting of red, green and blue,
- wherein the second power source circuit is applied to the light emitting elements for emitting light of a color other than that of the first power source circuit.
4 more elements
A display device comprising:
- a plurality of pixels;
- a plurality of source signal lines and a plurality of gate signal lines arranged in a matrix shape over a substrate;
- a plurality of light emitting elements provided at each of the plurality of pixels, each of the light emitting elements comprising at least one light emitting layer comprising an organic material for emitting light of a color selected from the group consisting of red, green and blue;
- and
- a power source circuit over the substrate for applying at least one of an electric current and a voltage to the light emitting elements for emitting light of a color selected from the group consisting of red, green and blue.
2 more elements
A display device comprising:
- a plurality of pixels;
- a plurality of source signal lines and a plurality of gate signal lines arranged in a matrix shape over a substrate;
- a plurality of light emitting elements provided at each of the plurality of pixels, each of the light emitting elements comprising at least one light emitting layer comprising an organic material for emitting light of a color selected from the group consisting of red, green and blue;
- and
- a power source circuit using an operational amplifier over the substrate for applying at least one of an electric current and a voltage to the light emitting elements for emitting light of a color selected from the group consisting of red, green and blue.
2 more elements
Dependencies are inferred from the claim text.