Pixel circuit display apparatus and electronic apparatus equipped with current driving type light-emitting device
First Claim
1. A display apparatus, comprising:
- a current driving type light-emitting device provided for each pixel;
a driving device provided for each of said pixels that controls a driving current flowing to said light-emitting device;
a power source unit that supplies a power source voltage through a power wire to cause said driving current to flow to said light-emitting device via said driving device;
a signal wire driving unit that supplies a data signal having a voltage to said driving device through a signal wire, said driving device controlling said driving current in accordance with the voltage with said data signal; and
a voltage adjusting unit that adjusts at least one of said power source voltage of said power source unit and said data signal at said signal wire driving unit, in such a manner that, when a data signal of a predetermined voltage is supplied to said driving device through said signal wire, at least one of a quantity of driving current flowing and a quantity of light emitted by said light-emitting device comes close to a predetermined reference value.
1 Assignment
0 Petitions
Accused Products
Abstract
A display apparatus is provided with a current driving type light-emitting device and a driving device for controlling a driving current flowing through the light-emitting device for each pixel of the display apparatus. The display apparatus consists of power source units for supplying power for causing a driving current to flow via the driving device to the light-emitting device via a power source wire, and signal wire driving units for supplying a data signal to the driving device via signal wires. In addition, voltage adjusting units adjust a voltage for the power source units or a data signal from the signal wire driving units so that a quantity of a driving current flowing through the light emitting device when a data signal of a predetermined voltage is supplied to the driving device via signal wires or a quantity of emitted light emitted from the light-emitting device comes close to a predetermined reference value.
492 Citations
20 Claims
-
1. A display apparatus, comprising:
-
a current driving type light-emitting device provided for each pixel;
a driving device provided for each of said pixels that controls a driving current flowing to said light-emitting device;
a power source unit that supplies a power source voltage through a power wire to cause said driving current to flow to said light-emitting device via said driving device;
a signal wire driving unit that supplies a data signal having a voltage to said driving device through a signal wire, said driving device controlling said driving current in accordance with the voltage with said data signal; and
a voltage adjusting unit that adjusts at least one of said power source voltage of said power source unit and said data signal at said signal wire driving unit, in such a manner that, when a data signal of a predetermined voltage is supplied to said driving device through said signal wire, at least one of a quantity of driving current flowing and a quantity of light emitted by said light-emitting device comes close to a predetermined reference value. - View Dependent Claims (2, 3, 4, 5)
said driving device comprising a thin film transistor having a gate to which said data signal is supplied, and a source and a drain between which said driving current flows, a conductance between said source and said drain being controlled by a gate voltage. -
3. The display apparatus according to claim 1,
said voltage adjusting unit comprising: - a current measuring unit that measures a quantity of driving current when a data signal of said predetermined voltage is supplied to said driving device; and
a voltage control unit that adjusts at least one of said power source voltage and said data signal voltage such that said measured current approaches a predetermined reference current.
- a current measuring unit that measures a quantity of driving current when a data signal of said predetermined voltage is supplied to said driving device; and
-
4. The display apparatus according to claim 1,
said voltage adjusting unit comprising: - a light-emitting measuring unit that measures the quantity of said emitted light at the time when a data signal of said predetermined voltage is supplied to said drive device; and
a voltage control unit that adjusts at least one of said power source voltage and said data signal voltage such that said measured quantity of emitted light approaches said reference quantity of emitted light.
- a light-emitting measuring unit that measures the quantity of said emitted light at the time when a data signal of said predetermined voltage is supplied to said drive device; and
-
5. The display apparatus according to claim 1, further comprising a controller that controls said voltage adjusting unit so as to adjust at least one of said power source voltage and said data signal voltage at a non-display period preceding a display period.
-
-
6. A display apparatus, comprising:
-
a current driving type light-emitting device for each pixel;
a power source unit that supplies a power source voltage through a power wire to cause a driving current to flow through said current driving type light-emitting device;
a signal wire driving unit that supplied a data signal to said current driving type light-emitting device;
a voltage adjusting unit that adjusts at least one of said power source voltage of said power source unit and said data signal at said signal wire driving unit, in such manner that, when a data signal of predetermined voltage is supplied to said current driving type light-emitting device, at least one of a quantity of driving current flowing through said current driving type light-emitting device and a quantity of light emitted by said light-emitting device comes close to a predetermined reference value. - View Dependent Claims (7)
-
-
8. A display apparatus, comprising:
-
a current driving light-emitting device provided for each pixel;
a driving device provided for each pixel that controls a driving current flowing to the light-emitting device;
a power source unit that supplies a power source voltage through a power wire to cause the driving current flow to the light-emitting device via the driving device;
a signal wire driving unit that supplies a data signal having a voltage to the driving device through a signal wire, the driving device controlling the driving current in accordance with the data signal; and
a voltage adjusting unit that adjusts at least one of the power source voltage of the power source unit and the data signal at the signal wire driving unit based upon at least a measurement result at a measuring unit, the measuring unit for measuring at least one of a quantity of driving current flowing through the light-emitting device and a quantity of a light emitted by the light-emitting device. - View Dependent Claims (9, 10, 11, 12)
the measuring unit being a current measuring unit that measures a quantity of driving current through the light-emitting device when a data signal of a predetermined voltage is supplied to the driving device.
-
-
10. The display apparatus according to claim 8, wherein:
the measuring unit is a light-emitting unit that measures a quantity of a light emitted by the light-emitting device.
-
11. The display apparatus according to claim 8, further comprising:
a controller that controls the voltage adjusting unit so as to adjust at least one of the power source voltage and the data signal at a non-display period.
-
12. The display apparatus according to claim 8, wherein:
the voltage adjusting unit adjusting the at least one of the power source voltage of the power source unit and the data signal at the signal wire driving unit in such a manner that a difference between the measurement value and the predetermined reference value is obtained, the measurement value being obtained when a predetermined data signal is supplied to the driving device through the signal wire.
-
13. A display apparatus, comprising:
-
a plurality of current driving light-emitting devices, each of which is provided for each pixel;
a power source unit that supplies a power source voltage through a power wire to cause the driving current to flow to the light-emitting device via the driving device;
a signal wire driving unit that supplies a data signal to the driving device through a signal wire, the driving device controlling the driving current in accordance with the data signal; and
an adjusting unit that adjusts at least one of the power source voltage of the power source unit and the data signal at the signal wire driving unit based upon at least a measurement result at a measuring unit, the measuring unit for measuring at least one of a quantity of a driving current flowing through a predetermined light-emitting device of the light-emitting devices and a quantity of a light emitted by a predetermined light-emitting device of the light-emitting devices. - View Dependent Claims (14)
a driving device provided for each pixel that controls a driving current flowing to the light-emitting device.
-
-
15. A display apparatus, comprising:
-
a plurality of current driving light-emitting devices, each of which is provided for each pixel;
a driving device provided for each pixel that controls a driving current flowing to the light-emitting device;
a power source unit that supplies a power source voltage through a power wire to cause the driving current to flow to the light-emitting device via the driving device;
a signal wire driving unit that supplies a data signal having a voltage to the driving device through a signal wire, the driving device controlling the driving current in accordance with the data signal; and
a voltage adjusting unit that adjusts at least one of the power source voltage of the power source unit and the data signal at the signal wire driving unit based upon comparison results of a comparison circuit that compares a measurement value by a measuring unit to a predetermined reference value, the measuring unit measures at least one of a quantity of driving current flowing through a predetermined light-emitting device of the light-emitting devices and a quantity of light emitted by a predetermined light-emitting device of the light-emitting devices. - View Dependent Claims (16)
the voltage adjusting the at least one of the power source voltage of the power source unit and the data signal at the signal wire driving unit in such a manner that a difference between the measurement value and the predetermined reference vaule is obtained, the measurement value being obtained when a predetermined data signal is supplied to the driving device through the signal wire.
-
-
17. A display apparatus, comprising:
-
a current driving light-emitting device provided for each pixel;
a driving device provided for each pixel that controls a driving current flowing to the light-emitting device;
a power source unit that supplies a power source voltage through a power wire to cause the driving current to flow to the light-emitting device via the driving device;
a signal wire driving unit that supplies a data signal having a voltage to the driving device through a signal wire, the driving device controlling the driving current in accordance with the data signal; and
a voltage adjusting unit that adjusts at least one of the power source voltage of the power source unit and the data signal at the signal wire driving unit based upon comparison results of a comparison circuit that compares measured current by a current measuring unit to a predetermined reference current, the measuring unit measures a quantity of driving current flowing through a predetermined light-emitting device of the light-emitting devices.
-
-
18. A display apparatus, comprising:
-
a current driving light-emitting device provided for each pixel;
a driving device provided for each pixel that controls a driving current flowing to the light-emitting device;
a power source unit that supplies a power source voltage through a power wire to cause the driving current to flow to the light-emitting device via the driving device;
a signal wire driving unit that supplies a data signal having a voltage to the driving device through a signal wire, the driving device controlling the driving current in accordance with the data signal; and
a voltage adjusting unit that adjusts at least one of the power source voltage of the power source unit and the data signal at the signal wire driving unit based upon comparison results of a comparison circuit that compares a quantity of emitted light from the light-emitting device by a quantity-of-emitted-light measauring unit to a predetermined reference quantity of emitted light, the quantity-of-emitted-light measuring unit measures a quantity of light by the light-emitting device. - View Dependent Claims (20)
the deterioration of the light-emitting device or the driving device being determined by a measuring unit, the measuring unit measures at least one of a quantity of driving current flowing through the light-emitting device and a quantity of a light emitted by the light-emitting device.
-
-
19. A display apparatus, comprising:
-
a current driving light-emitting device provided for each pixel;
a driving device provided for each pixel that controls a driving current flowing to the light-emitting device;
a power source unit that supplies a power source voltage through a power wire to cause the driving current to flow to the light-emitting device via the driving device;
a signal wire driving unit that supplies a data signal to the driving device through a signal wire, the driving device controlling the driving current in accordance with the data signal; and
a voltage adjusting unit that increases the power source voltage of the power source unit compared to an initially set power source voltage of the power source when the light-emitting device or the driving device suffers a deterioration over time.
-
Specification