A pixel circuit, a display device and a driving method of the pixel circuit

Abstract

Embodiments of the present invention relate to the field of display technology, and disclose a pixel circuit, a display device and a driving method for the pixel circuit. The pixel circuit includes: a first transistor, a second transistor, a third transistor, a storage device and a light-emitting device; the control end of the first transistor is connected to the first scan line, the first end of the first transistor is connected to the data line, and the first transistor The second end of the storage device is connected to the output node; the first end of the storage device is connected to the output node, and the second end of the storage device is connected to the control line; the control end of the second transistor is connected to the output node, and the first end of the second transistor is connected to the power supply voltage connection, the second end of the second transistor is connected to the first end of the third transistor; the control end of the third transistor is connected to the second scan line, the second end of the third transistor is connected to the anode of the light-emitting device, and the The cathode is grounded. The control of the luminous brightness of the pixel circuit is improved.

Description

technical field [0001] Embodiments of the present invention relate to the field of display technology, and in particular, to a pixel circuit, a display device, and a method for driving the pixel circuit. Background technique [0002] Organic Light-Emitting Diode (OLED), as a current-type light-emitting device, has been more and more popular because of its characteristics of self-luminescence, fast response, wide vision, and the ability to be fabricated on flexible substrates. It is used in the field of high-performance display. OLED can be divided into PMOLED (Passive matrix organic light-emitting diode, passive matrix organic light-emitting diode) and AMOLED (Active-matrix organic light-emitting diode, active matrix organic light-emitting diode) according to the driving method. With the rapid development of flat panel display technology, especially AMOLED display screens have been widely used in high-end mobile phones, TVs and other electronic display products. As a new g...

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Problems solved by technology

[0003] However, the inventors have found that at least the following problems exist in the prior art: in high-end display products, pixel drive circuits generally use active arrays, but mainstream active drive array circuits are driven by analog signals, resulting in high circuit power consumption and signal Susceptible to interference, high dependence on the consistency of driving devices or compensation circuits, etc.

Due to the small pixel size in display products with high pixel density, the storage capacitor in the design of the pixel in the digital drive circuit is too small, and the luminance of the light-emitting device cannot be accurately controlled and adjusted, resulting in the uneven brightness of the pixel circuit. Uniform

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