Pixel circuit, driving method and displayer
A technology of a pixel circuit and a driving unit, which is applied in the field of driving methods, displays, and pixel circuits, can solve the problems of complex structure and unstable light emission of light-emitting diodes.
Inactive Publication Date: 2017-10-03
EVERDISPLAY OPTRONICS (SHANGHAI) CO LTD
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Problems solved by technology
[0010] The invention provides a pixel circuit, a driving method and a display, which are used to solve the problems of unstable light emission and complicated structure of light-emitting diodes existing in the existing pixel circuit
Method used
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Embodiment 2
[0086] Embodiments of the present invention also provide Figure 7 A driving method for the pixel circuit shown, according to Figure 10 The drive signal shown, Figure 7 The driving method of the pixel circuit shown is:
[0087] In the initialization stage, the first scan signal Sn is at a high level, so that the data selection transistor T3 and the switching transistor T5 are turned off, and the compensation unit 1 is turned off. The first control signal En is at a high level, so that the light emitting control transistor T4 is turned off, and the driving unit 2 is turned off. The second control signal Sn-1 is at a low level, causing the first initialization transistor T6 and the second initialization transistor T7 to be turned on, T6 transfers the initialization voltage to the first node N1, thereby initializing the first node N1, and T7 transfers the initialization voltage Vin is delivered to the light emitting unit EL4, thereby initializing the light emitting unit EL4....
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The invention discloses a pixel circuit, a driving method and a displayer. In a compensation unit, a first electrode of a switch transistor is connected with the grid electrode of a compensation transistor, and a second electrode of the switch transistor is connected with a first electrode of the compensation transistor; the grid electrode of the compensation transistor is connected with a driving unit through a first node, and a second electrode of the compensation transistor is connected with a data signal; an external power source, the driving unit and a light-emitting unit are connected in series in sequence; a capacitor is located between the first node and the external power supply; a compensation unit sets the voltage of the first node to be a first voltage; the capacitor keeps the voltage of the first node as the first voltage; the driving unit generates a drive current to drive the light-emitting unit to emit light; and a drive transistor in the driving unit and the compensation transistor are common-gate transistors. The pixel circuit, the driving method and the displayer avoid influence of the external power source on the data signal and improve light-emitting stability of a light-emitting diode; and besides, the switch transistor realizes the function of two transistors, thereby simplifying circuit structure and reducing circuit cost.
Description
technical field [0001] The invention relates to the technical field of electronic displays, in particular to a pixel circuit, a driving method and a display. Background technique [0002] In an existing pixel circuit, generally a light emitting diode in the pixel circuit is driven to emit light through a thin film transistor, and this thin film transistor is called a driving transistor. The driving transistor works in a saturated state, because in the saturated state, the sensitivity of the driving current output by the driving transistor to the source-drain voltage is lower than that of the driving transistor in the linear state, which can provide a more stable driving current for the light emitting diode. figure 1 For the existing most basic pixel circuit, such as figure 1 As shown, the pixel circuit is composed of two transistors T11 and T12, and a capacitor C11. When the Sn signal controls the transistor T12 to be turned on, the data signal data is written into the N1 ...
Claims
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Patent Timeline
Login to View More IPC IPC(8): G09G3/32
CPCG09G3/32G09G2300/0814G09G2300/0819G09G2300/0833G09G2320/045G09G2330/021G09G2310/0278G09G2310/0243
Inventor 周兴雨
Owner EVERDISPLAY OPTRONICS (SHANGHAI) CO LTD