Pixel circuit, driving method of pixel circuit and display panel
A technology of pixel circuit and driving module, applied in static indicators, instruments, etc., can solve the problems of complicated driving circuit design, and achieve the effect of reducing design complexity and production cost.
Active Publication Date: 2020-05-29
SOUTH CHINA UNIV OF TECH
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Problems solved by technology
At this time, the data signal and the PWM signal of the power supply need to be precisely synchronized, which makes the design of the driving circuit for driving Micro-LED light very complicated.
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[0052] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, but not to limit the present invention. In addition, it should be noted that, for the convenience of description, only some structures related to the present invention are shown in the drawings but not all structures.
[0053] figure 1 It is a structural schematic diagram of an existing pixel circuit. Such as figure 1 As shown, the pixel circuit includes a switch transistor M1, a drive transistor M2, a storage capacitor c1 and a light emitting diode D1. The gate of the switching transistor M1 is electrically connected to the scanning signal line scan, the first pole of the switching transistor M1 is electrically connected to the data line data, the second pole of the switching transistor M1 is connected to the gate of the drivi...
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The invention discloses a pixel circuit, a driving method of the pixel circuit and a display panel. The pixel circuit comprises a data writing module, a storage module, a driving module and a light emitting device, wherein the driving module comprises a first control end and a second control end, and the data writing module is used for writing a data signal into the first control end of the driving module in a data writing stage; the storage module is used for maintaining the potential of the first control end; the second control end is electrically connected with the pulse width modulation signal input end of the pixel circuit and used for controlling the driving module to provide discontinuous driving current according to pulse width modulation signals input by the pulse width modulationsignal input end in the light emitting stage, and the light emitting device responds to the driving current to emit light. The design complexity of the driving circuit for driving the pixel circuit to work can be reduced; meanwhile, when the light-emitting device works in an area with high light-emitting efficiency and stable light-emitting color, and the light-emitting brightness corresponding to different gray scales is met.
Description
technical field [0001] Embodiments of the present invention relate to the field of display technology, and in particular, to a pixel circuit, a driving method for the pixel circuit, and a display panel. Background technique [0002] Micro-LED (Micro Light Emitting Diode, Micro-LED) display device can miniaturize the size of Light Emitting Diode (LED), and has higher The advantages of high luminous brightness, luminous efficiency and lower operating power consumption have gradually attracted people's attention. [0003] When Micro-LED works at low current density, its luminous efficiency is low. Moreover, the luminous wavelength is different from the luminous wavelength at high grayscale, which causes the color shift problem of the displayed color of the Micro-LED display device. When the Micro-LED display device is displaying, it can be driven to emit light by using a pulse width modulation (Pulse Width Modulation, PWM) signal and a digital driving method through the power...
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IPC IPC(8): G09G3/32
CPCG09G3/32G09G2320/0626G09G3/2014G09G3/3258G09G2320/0242G09G2300/0842G09G3/3233G09G3/2011G09G2320/0673G09G2320/0257G09G2320/0295G09G2300/0426G09G2300/0819G09G2310/0267G09G2310/0275G09G2310/061G09G2310/08G09G2330/028
Inventor 徐苗周雷李民李洪濛徐华陈子楷邹建华王磊彭俊彪陶洪
Owner SOUTH CHINA UNIV OF TECH