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Pixel circuit, driving method and display

A pixel circuit and drive unit technology, applied in the field of drive methods, displays, and pixel circuits, can solve problems such as unstable light emission of light-emitting diodes

Active Publication Date: 2017-08-11
EVERDISPLAY OPTRONICS (SHANGHAI) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The present invention provides a pixel circuit, a driving method and a display, which are used to solve the problem of unstable light emission of a light-emitting diode existing in the existing pixel circuit

Method used

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  • Pixel circuit, driving method and display
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  • Pixel circuit, driving method and display

Examples

Experimental program
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Embodiment 1

[0076] Figure 11 One of the feasible implementations of a pixel circuit provided by the embodiment of the present invention, such as Figure 11 As shown, the compensation unit includes a data gate transistor T3, a compensation transistor T1 and a switch transistor T5, the drive unit includes a drive transistor T2 and a light emission control transistor T4, and the initialization unit includes a first initialization transistor T6 and a second initialization transistor T7.

[0077] In the compensation unit, the drain of the data strobe transistor T3 is electrically connected to the source of the compensation transistor T1, and the source of the data strobe transistor T3 is electrically connected to the data signal data; the gate of the data strobe transistor T3 is electrically connected to the first scan signal Sn is electrically connected; the gate of the compensation transistor T1 is electrically connected to the gate of the driving transistor T2 through the first node N1, an...

Embodiment 2

[0086] Figure 12 One of the feasible implementations of a pixel circuit provided by the embodiment of the present invention, such as Figure 12 As shown, the compensation unit includes a data gate transistor T3 and a compensation transistor T1, the drive unit includes a drive transistor T2 and a light emission control transistor T4, and the initialization unit includes a first initialization transistor T6 and a second initialization transistor T7.

[0087] In the compensation unit, the drain of the data strobe transistor T3 is electrically connected to the source of the compensation transistor T1, and the source of the data strobe transistor T3 is electrically connected to the data signal data; the gate of the data strobe transistor T3 is electrically connected to the first scan signal Sn is electrically connected; the gate of the compensation transistor T1 is electrically connected to the gate of the driving transistor T2 through the first node N1, and the drain of the compe...

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PUM

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Abstract

The invention discloses a pixel circuit, a driving method and a display, which are used for improving luminescence stability of the pixel circuit. The pixel circuit is characterized in that a compensation unit is electrically connected with a driving unit through a first node; an external power supply, a driving unit and a light-emitting unit are connected in series in sequence; a capacitor is arranged between the first node and the external power supply; the compensation unit is used for setting voltage of the first node to be a first voltage through a compensation transistor in the compensation unit under the function of a first scanning signal; the capacitor is used for keeping the voltage of the first node be the first voltage; the driving unit is externally connected with a first control signal to generate a drive current so as to drive the light-emitting unit to emit light; and a driver transistor in the driving unit and the compensation transistor are common-gate transistors. A data signal is compensated through the compensation unit; and since the compensation unit is not connected with the external power source, influence of the external power source on the data signal is avoided, and luminescence stability of the light-emitting diode is improved.

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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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/32
CPCG09G3/32G09G2310/061G09G3/3233G09G2300/0819G09G2310/0262G09G2320/0233G09G2300/043G09G2300/0876G09G2310/0267
Inventor 周兴雨
Owner EVERDISPLAY OPTRONICS (SHANGHAI) CO LTD