Pixel drive circuit and display circuit

Abstract

The invention relates to a pixel drive circuit and a display circuit applying the pixel drive circuit. The pixel drive circuit is made by adopting semiconductor devices, the sizes of the semiconductor devices are small, thus enough space can be reserved for light-emitting devices, the light-emitting areas of the light-emitting devices are ensured, the display brightness of the light-emitting devices is further ensured, and the processing and the manufacturing are simultaneously convenient. According to the pixel drive circuit disclosed by the invention, capacitors which are adopted in the traditional drive circuit are abandoned, signal control processes are controlled by adopting switches through the semiconductor devices, the precise adjustment of pixel turning on and off is realized, the uniformity and the consistency of the display brightness between pixels are ensured, and the display effect is ensured.

Description

technical field [0001] The invention relates to the technical field of driving circuits, in particular to a pixel driving circuit and a display circuit. Background technique [0002] Chinese patent document CN102110407A discloses a pixel driving circuit, a discharge method, a data writing method and a driving display method, and specifically discloses a driving circuit, see figure 1 As shown, it includes data lines, scan lines, power lines for connecting power electrodes, ground wires for connecting ground electrodes, and OLED (Organic Light-Emitting Diode, full name Organic Light-Emitting Diode) devices, and also includes: capacitive charging field Effect transistors, light-emitting driving field effect transistors and data storage capacitors. This patent document uses a structure of three thin film transistors and a capacitor, which reduces power load and power consumption compared with the existing drive circuit with a structure of four thin film transistors and a capaci...

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Problems solved by technology

[0003] The above-mentioned pixel driving circuits all include at least one capacitor. In semiconductor circuits, capacitors are made by means of two or more layers of planar electrodes with an insulating layer in between. Due to the small size of the pixels, the fabrication of capacitors requires a large footprint compared to semiconductor devices. The large area occupies most of the space in the pixel, reduces the aperture ratio of the pixel, reduces the light-emitting area, and affects the display brightness of the pixel; in addition, the use of capacitors in traditional drive circuits is actually an analog process, due to the manufacturing process The discreteness of the capacitance, the inconsistent time constant of the capacitor, the inconsistent charging and discharging time of the capacitor during the working process, and the inconsistent luminous time of the light-emitting device driven by the capacitor discharge, the precise control of the on and off time of the pixel cannot be realized, which directly leads to the gap between the pixels. The unevenness of the display brightness affects the display effect

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