Pixel circuit, pixel circuit driving method and display device
A technology of pixel circuits and driving transistors, applied in static indicators, input/output of user/computer interaction, instruments, etc., can solve problems such as no good solutions, increase circuit structure and operational complexity, and maintain uniformity Effects of Sex and Stability
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Embodiment 1
[0060] In this embodiment, the pixel circuit structure of a common-cathode OLED display is taken as an example for illustration. Such as image 3 As shown in , the pixel circuit in the present invention includes an electroluminescence element, a drive transistor, a first switch unit, a compensation unit, an isolation unit, and a storage capacitor; the first switch unit is used to control the writing of the data voltage of the data line, and the second The first end of a switch unit is connected to the first end of the storage capacitor, and the first end is connected to the data line; the second end of the storage capacitor is respectively connected to the drive transistor gate and the first end of the compensation unit; the compensation unit is used to provide the storage capacitor The threshold voltage of the driving transistor is stored in advance, the second terminal of the compensation unit is connected to the drain of the driving transistor; the source of the driving tra...
Embodiment 2
[0074] The present invention also perfectly integrates the touch circuit in the pixel circuit; in this embodiment, the pixel circuit described in Embodiment 1 is used as an example to illustrate, Figure 10 Shown in is the pixel circuit in this embodiment, except that it includes an organic light emitting diode OLED, a driving transistor DTFT, a first switching transistor T5, a compensation transistor T2, an isolation transistor T3, a reset transistor T6 and a storage capacitor C st In addition, it also includes a touch control circuit integrated in the above pixel circuit, the touch control circuit includes a charging transistor T4, a coupling capacitor C P , the sensing electrode Sense Electrode, the amplifying transistor ATFT and the second switching transistor T1; the gate of the charging transistor T4 is connected to the third control signal terminal, and the source is connected to the storage capacitor C st The second terminal is connected, and the drain is connected to ...
Embodiment 3
[0103] This embodiment provides a display device, including the above-mentioned pixel circuit. Specifically, the display device includes a plurality of pixel unit arrays, and each pixel unit corresponds to any pixel circuit in the above-mentioned embodiments. Since the pixel circuit compensates the drift of the threshold voltage of the driving transistor, the display of the organic light emitting diode is stable without flickering, thereby ensuring the display quality of the organic light emitting display device; at the same time, the touch control circuit in the present invention multiplexes the control of the pixel circuit The signal, while charging the storage capacitor, charges the coupling capacitor in the touch circuit through the charging transistor, which perfectly realizes the integration of the touch circuit in the pixel circuit, integrates the display and touch functions, and uses a process that is It can be completed without being divided into two process flows, so...
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