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Pixel circuit, drive method and display

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 unstable light emission of light-emitting diodes and insufficient circuit safety.

Inactive Publication Date: 2017-08-04
EVERDISPLAY OPTRONICS (SHANGHAI) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The present invention provides a pixel circuit, a driving method and a display, which are used to solve the problems of unstable light emission of light-emitting diodes and insufficient circuit safety existing in the prior art

Method used

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  • Pixel circuit, drive method and display
  • Pixel circuit, drive method and display
  • Pixel circuit, drive method and display

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0082] Figure 10 One of the feasible implementations of a pixel circuit provided by the embodiment of the present invention, such as Figure 10 As shown, the compensation unit 1 includes a data gate transistor T3, a compensation transistor T1 and a switch transistor T5, the driving unit 2 includes a driving transistor T2 and a light emission control transistor T4, and the initialization unit 5 includes a first initialization transistor T6 and a second initialization transistor T7.

[0083]In the compensation unit 1, 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 connected to the first scanning The 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 ...

Embodiment 2

[0092] Figure 12 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 1 includes a data gating transistor T3 and a compensation transistor T1, the driving unit 2 includes a driving transistor T2 and a light emission control transistor T4, and the initialization unit 5 includes a first initialization transistor T6 and a second initialization transistor T7.

[0093] In the compensation unit 1, 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 connected to the first scanning The 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 ...

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PUM

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Abstract

The invention discloses a pixel circuit, a drive method and a display. A compensation unit is electrically connected with a drive unit through a first node. An external power supply, the drive unit and a light-emitting unit are connected in series. A capacitor is located between the first node and the external power supply. An initialization unit is located between the first node and the light-emitting unit. The compensation unit enables a voltage of the first node to be set as a first voltage. The capacitor maintains the voltage of the first node as the first voltage. The drive unit generates a drive current to drive the light-emitting unit to emit light. A drive transistor in the drive unit and a compensation transistor in the compensation unit are common-gate transistors. The initialization unit is controlled by a second scanning signal to initialize the first node, and is controlled by a third scanning signal to initialized the light-emitting unit. The light-emitting stability is improved through the avoiding of the impact on a data signal from the external power supply. The first node and the light-emitting unit are initialized at different time stages, and the circuit is protected from being damaged, thereby improving the safety of the pixel circuit.

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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IPC IPC(8): G09G3/32
CPCG09G3/32G09G2300/0814G09G2300/0819G09G2320/0233G09G2320/045
Inventor 周兴雨
Owner EVERDISPLAY OPTRONICS (SHANGHAI) CO LTD