Pixel driving circuit of Micro LED display device and driving method of pixel driving circuit
A pixel drive circuit and display device technology, applied in static indicators, instruments, etc., can solve problems such as display problems, inability to achieve continuous adjustment of gray scale, signal coupling, etc., to avoid signal coupling and current density drop Effect
Inactive Publication Date: 2021-03-26
NANJING CEC PANDA LCD TECH
View PDF5 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
The existing PWM (Pulse Width Modulation, Pulse Width Modulation) circuit is mainly carried out by adjusting the EM signal, which can only control the light-emitting time of the light-emitting element by inserting pulses within the display time, and the overall brightness of the display can only be in several levels. The continuous adjustment of the gray scale cannot be achieved, and the frequent switching of the EM signal causes the coupling of the signal, which further causes display problems
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0030] Below in conjunction with accompanying drawing and specific embodiment, further illustrate the present invention, should be understood that these embodiments are only for illustrating the present invention and are not intended to limit the scope of the present invention, after having read the present invention, those skilled in the art will understand various aspects of the present invention Modifications in equivalent forms all fall within the scope defined by the appended claims of this application.
[0031] In order to make the drawing concise, each drawing only schematically shows the parts related to the present invention, and they do not represent the actual structure of the product. In addition, to make the drawings concise and easy to understand, in some drawings, only one of the components having the same structure or function is schematically shown, or only one of them is marked. Herein, "a" not only means "only one", but also means "more than one".
[0032] ...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention provides a pixel driving circuit of a Micro LED display device and a driving method of the pixel driving circuit. Signals input into the pixel driving circuit comprise a power supply positive electrode signal, a power supply negative electrode signal, a low level signal, a data voltage signal, a current line light-emitting signal for controlling a current line light-emitting unit toemit light, a current line scanning signal, and a current line first control signal and a current line second control signal for adjusting light-emitting time of the current line light-emitting unit.The pixel driving circuit comprises a first TFT switch, a second TFT switch, a fifth TFT switch, a sixth TFT switch, a seventh TFT switch, an eighth TFT switch and a capacitor which serve as driving transistors. According to the pixel driving circuit, Vth compensation can be carried out on the first TFT switch serving as a driving transistor, the light-emitting time of a Micro-LED can be continuously adjusted, triangular wave signals are output within the light-emitting time through the first control signal Vsweep[n] and the second control signal Vs[n] of the row, and the brightness of a panelis adjusted through amplitude modulation and pulse modulation methods.
Description
technical field [0001] The present invention relates to the technical field of Micro LED, in particular to a pixel driving circuit of a Micro LED display device and a driving method thereof. Background technique [0002] With the development of the times, Micro LED has gradually entered the public's field of vision. Micro LED has the advantages of high brightness, low delay, long life, and wide application, which can improve the aging and burn-in of materials of OLED light-emitting devices. [0003] In addition to compensating the threshold voltage Vth of the active device TFT / MOS, the driving circuit of the Micro-LED also needs to ensure a stable current for the Micro-LED chip. Since the driving current of the Micro-LED chip is smaller, so The requirement for the stability of current is much higher than that of OLED devices. In addition, according to recent studies, the chromaticity of Micro-LED will drift with the change of current density. [0004] The existing drive ci...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/32
CPCG09G3/32G09G2310/0259
Inventor 刘德钰
Owner NANJING CEC PANDA LCD TECH