A pixel circuit, a fading compensation method for the pixel circuit, and a display screen
A technology of pixel circuit and acquisition circuit, applied in the field of display screen, can solve the problem of increasing the area of the driving transistor T, and achieve the effect of reducing the area and emitting uniform light
Active Publication Date: 2020-03-20
GIGADISPLAY SEMICON CO LTD
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Problems solved by technology
However, even if W is set to the minimum width, L will become long, resulting in an increase in the area of the drive transistor T, which ultimately limits the reduction of the pixel circuit area.
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[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the present invention.
[0032] A pixel circuit and a degradation compensation method of the pixel circuit disclosed in the present invention can correct the degradation of the light emitting device in the pixel circuit by superimposing the conduction voltage difference ΔV of the light emitting device on the data voltage Vdata in the data writing stage. compensate.
[0033] combine Figure 2 ~ Figure 3 As shown, a pixel circuit includes a first switching transistor SW0, a capacitor Cs, a driving transistor T0, a light emitting device OLED, and a voltage difference acquisition circuit. Wherein, the first switching transistor SW0, the capacitor Cs and the gate of the driving transistor T0 are connected in series, and the capacitor Cs is connected between the first switching transistor SW0 and the gate of the d...
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The invention discloses a pixel circuit, a recession compensation method of the pixel circuit and a display screen and belongs to the technical field of display. The pixel circuit comprises a first switch transistor, a capacitor, a driving transistor, a light emitting device and a voltage difference acquisition circuit. In a difference extraction phase, conduction voltage difference of the light emitting device is acquired by the voltage difference acquisition circuit and stored in the capacitor; in the data input phase, the conduction voltage difference is superposed to a data voltage; in thelight emitting phase, a light emitting diode is driven by the driving transistor to emit light. The pixel circuit is advantaged in that a problem of low brightness caused by recession of the light emitting device is effectively solved, an advantage of reduction of the area of the pixel circuit is realized, and the pixel circuit is suitable for the high-resolution display structure, such as a silicon-based OLED display screen.
Description
technical field [0001] The invention relates to the field of display technology, in particular to a pixel circuit capable of compensating for the degradation of a light-emitting device, a method for compensating for the degradation of the pixel circuit, and a display screen. Background technique [0002] OLED display has the characteristics of self-illumination, wide viewing angle, high contrast, low power consumption, and fast response. With the continuous development of OLED display technology, OLED display is widely used in mobile phones, computers and so on. Such as figure 1 As shown, a typical current-driven pixel circuit applied to an OLED display is configured at the intersection of the scanning lines arranged in the row direction to supply control signals and the data lines arranged in the column direction to supply data signals, which include The driving transistor T, the switching transistor SW, the capacitor Cs', and the light emitting device OLED', wherein the d...
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IPC IPC(8): G09G3/3208
CPCG09G3/3208
Inventor 孙丽娜田琪
Owner GIGADISPLAY SEMICON CO LTD