Voltage drop compensation method, device thereof and display device

Abstract

The embodiment of the invention discloses a voltage drop compensation method, a device thereof and a display device, which relate to the technical field of display and aim at compensating IR Drop of the display device to enhance the display effects of the display device. The voltage drop compensation method comprises steps: the impedance distribution of each pixel row of a display panel at the maximum display brightness is acquired, and a voltage drop model is built according to the impedance distribution of each pixel row; source-end input current of the display panel in the case of real-timedisplay is acquired, the source-end input current is used as an input value of the voltage drop model, and voltage drop corresponding to each pixel row is determined; and according to the voltage drop, a compensation gray scale of a corresponding pixel row is determined respectively, and according to each compensation gray scale, gray scale compensation is carried out on the corresponding row pixel respectively. The voltage drop compensation method, the device thereof and the display device provided in the embodiment of the invention are used for a large-size AMOLED display device.

Description

technical field [0001] The invention relates to the field of display technology, in particular to a voltage drop compensation method and its device, and a display device. Background technique [0002] With the development of science and technology, Active Matrix / Organic Light Emitting Diode (Active Matrix / Organic Light Emitting Diode) display device is recognized by the industry as the display device with the most development potential due to its advantages of lightness, thinness, bright color, and high contrast. [0003] At present, in order to meet users' pursuit of better visual effects, the panel size and resolution of AMOLED display devices are constantly increasing. However, for AMOLED display devices with large panel size and high resolution, when using the same power supply voltage (V DD ) when supplying power to each pixel unit in its display area, since the wires that transmit electrical signals corresponding to each pixel unit have different resistances, it is ea...

AI Technical Summary

Problems solved by technology

However, for AMOLED display devices with large panel size and high resolution, when using the same power supply voltage (V DD ) when supplying power to each pixel unit in its display area, since the wires that transmit electrical signals corresponding to each pixel unit have different resistances, it is easy to make the same V DD After the signal is transmitted through each wire, there are different levels of voltage drop (IR Drop), which causes the actual voltage signal obtained by each pixel unit to be different. Therefore, when the same data signal (V data ) when each pixel unit is displayed and driven, each pixel unit tends to exhibit different brightness due to the existence of different IR Drops, which leads to uneven display brightness of the AMOLED display device and adversely affects the display effect of the AMOLED display device

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