Display apparatus and pixel driving method thereof
AssigneesChimei Innolux Corporation, Chi Mei EI Corporation
InventorsHong-Ru Guo, Ming-Chun Tseng, Chien-Hsiang Huang
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Abstract
A display device comprises a pixel structure. The pixel structure includes a first transistor having a gate and circuitry to initially set the first transistor gate at a first voltage. In response to a data signal received over a data line of the display device, the first transistor gate is set at a second voltage. The first transistor gate voltage transitions from the second voltage to a third voltage that is higher than the second voltage by a reference voltage. A light element is coupled to the first transistor and configured to emit light in response to a current through the light element.
Claims26
A display device comprising:
- a pixel structure comprising:
- a first transistor having a gate;
- circuitry to:
- initially set the first transistor gate at a first voltage,
- in response to a data signal received over a data line of the display device, set the first transistor gate at a second voltage,
- transition the first transistor gate voltage from the second voltage to a third voltage that is higher than the second voltage by a reference voltage;
- and
- a light element coupled to the first transistor and configured to emit light in response to a current through the light element.
A display device, comprising at least a pixel, the pixel comprising:
- a light element;
- a first transistor for outputting an operational current to the light element;
- a second transistor for inputting a first source voltage to a first terminal of the first transistor according to a power switch signal;
- a third transistor for inputting a pixel data voltage to a second terminal of the first transistor according to a present scan signal;
- a reset circuit for resetting a voltage of a control terminal of the first transistor to a reset voltage, the reset voltage being obtained according to the pixel data voltage and a threshold voltage of the first transistor;
- and
- a capacitor, having one end coupled to the control terminal of the first transistor and the other end coupled to a reference voltage signal for setting the voltage of the control terminal of the first transistor to a set voltage, the set voltage being obtained according to the reset voltage and the reference voltage signal;
- wherein the first transistor outputs the operational current to the light element according to the set voltage.
A display device comprising at least a pixel, the pixel comprising:
- a light element;
- a first transistor for outputting an operational current to the light element;
- a second transistor for inputting a first source voltage to a first terminal of the first transistor according to a power switch signal;
- a third transistor for inputting a pixel data voltage to a first terminal of the first transistor according to a present scan signal;
- a reset circuit for resetting a voltage of a control terminal of the first transistor to be a reset voltage, the reset voltage being obtained according to the pixel data voltage and a threshold voltage of the first voltage;
- and
- a capacitor having one end coupled to the control terminal of the first transistor and the other end coupled to a reference voltage signal for setting the voltage of the control terminal of the first transistor to be a set voltage, the set voltage being obtained according to the reset voltage and the reference voltage signal;
- wherein the first transistor outputs the operational current to the light element according to the set voltage.
A method for driving a pixel of a display device, the pixel comprising at least a transistor and a light element, the transistor used for controlling an operational current through the light element, the method comprising:
- presetting a control terminal of the transistor to be substantially equal to a preset voltage;
- inputting a pixel data voltage to a first terminal of the transistor such that the preset voltage is changed to a reset voltage, wherein the reset voltage is obtained according to the pixel data voltage and a threshold voltage of the transistor;
- setting a voltage of the control terminal of the transistor to be a set voltage, wherein the set voltage is obtained according to the reset voltage and a reference voltage signal;
- and
- outputting the operational current to the light element according to the set voltage.
Dependencies are inferred from the claim text.