Display device and control method thereof
AssigneeSamsung Electronics Co., Ltd.
InventorsKwang-chui Jung, Joon-chul Goh, Young-soo Yun, Beohm-rock Choi
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Abstract
A display device with improved brightness and a method of controlling the display device are presented. The display device includes a driving transistor, a pixel electrode electrically connected to the driving transistor, a detecting transistor detecting a magnitude of an electric signal transferred from the driving transistor to the pixel electrode, and a controller. The controller regulates a data voltage applied to the pixel electrode based on a difference between the detected electric signal and a predetermined reference level. The display device achieves improved homogeneity of brightness by compensating for any deterioration of TFTs.
Claims14
A display device comprising:
- a driving transistor;
- a driving voltage line applying a driving voltage to the driving transistor;
- a switching transistor connected to a gate electrode of the driving transistor;
- a data line applying a data voltage to the switching transistor;
- a first gate line applying a gate on voltage to the switching transistor;
- a pixel electrode electrically connected to the driving transistor;
- a detecting transistor detecting a magnitude of an electric signal transferred from the driving transistor to the pixel electrode;
- and
- a controller regulating a voltage applied to the pixel electrode based on a difference between the detected electric signal and a predetermined reference level;
- wherein a gate electrode of the detecting transistor is connected to a second gate line that is different from the first gate line.
A display device comprising:
- a pixel electrode;
- a detecting transistor detecting a pixel current applied to the pixel electrode;
- and
- a controller regulating a pixel voltage applied to the pixel electrode based on a difference between the pixel current and a predetermined reference level:
- wherein the controller comprises a memory storing a table of reference levels including a reference level that corresponds to the pixel current;
- and
- wherein the controller determines a compensation voltage based on a difference between a pixel voltage corresponding to a magnitude of the detected pixel current and a pixel voltage corresponding to the reference level.
A method of controlling a display device, the method comprising:
- storing, in a memory, a predetermined reference level corresponding to a data voltage;
- turning on a driving transistor;
- detecting an electric signal transmitted from the driving transistor to a pixel electrode;
- comparing the detected electric signal with the predetermined reference level;
- and
- regulating the data voltage applied to the pixel electrode based on a difference between the electric signal and the predetermined reference level:
- wherein regulating the data voltage comprises determining a compensation voltage corresponding to a difference between a data voltage corresponding to a magnitude of the detected electric signal and a voltage that corresponds to the reference level.
Dependencies are inferred from the claim text.