DC/DC power source converter connected with liquid crystal display panel
A technology of liquid crystal display panel and DC power supply, applied in static indicators, instruments, etc., can solve problems such as the reliability of contact terminals, and achieve the effect of improving the shortcomings of high current
Active Publication Date: 2016-03-30
NANJING CEC PANDA LCD TECH
View PDF9 Cites 2 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
This large current (I-rush) will flow through the glass traces and contact terminals, which will cause certain reliability problems to the contact terminals in the long run.
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
[0027] image 3 Shown is a schematic diagram of the circuit driving of the liquid crystal display of the present invention, the liquid crystal display 200 includes: a liquid crystal panel assembly 201, the liquid crystal panel assembly 201 is provided with a source line 202 and a gate line 203 that cross each other vertically and horizontally, and is arranged on the source line 202 and the gate line. The thin film transistor (not shown) at the intersection of the pole lines 203, the liquid crystal pixel unit, the source driver 204 connected to the source side of the liquid crystal panel assembly 201 and the gate driver 205 connected to the gate side of the liquid crystal panel assembly 201, A grayscale voltage generator 206 connected to the source driver 204, a timing controller 207 for controlling the source driver 204 and a gate driver 205, and a DC / DC power converter 208 responsible for the operating voltage required by the liquid crystal display , the DC / DC power converter...
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 DC / DC power source converter connected with a liquid crystal display panel. A voltage regulator, a charge pump and a voltage controller are arranged in the DC / DC power source converter; a switching circuit module is also arranged in the DC / DC power source converter; when the liquid crystal display panel is turned off, the voltage controller outputs VDDA voltage, the switching circuit module outputs VGH' voltage to a gate driver. According to the DC / DC power source converter of the invention, the switching circuit module is additionally arranged in the DC / DC power source converter, so that the VGH voltage can be switched to a AVDD reference level; the output condition of voltage is adjusted and controlled through XAO signals; according to an equation that I-rush=U / R, existing circuit board circuits and WOA wirings are not required to be adjusted; the startup voltage of a thin film transistor in shutdown is decreased to the AVDD reference level; and an I-rush circuit brought about by shutdown afterimages is decreased, so that the defect of large current caused by tide solving countermeasures for the afterimages can be eliminated.
Description
technical field [0001] The invention belongs to the technical field of power management chips, in particular to a DC / DC power converter connected with a liquid crystal display panel. technical background [0002] figure 1 It is an equivalent circuit of a liquid crystal display panel in the prior art, and the liquid crystal display panel is a liquid crystal display panel of matrix type (m*n) thin film transistors. and a plurality of gate lines (G1-Gn) 101, a thin film transistor 102 disposed at the intersection of the source line 100 and the gate line 101, and a liquid crystal pixel unit 103. Wherein, the source line 100 provides the source signal of the thin film transistor 102 , the gate line 101 provides the turn-on voltage and the turn-off voltage of the gate of the thin film transistor 102 , and the drain of the thin film transistor 102 is connected to the liquid crystal pixel unit 103 . [0003] When the liquid crystal display panel displays a white picture, the charg...
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 IPC IPC(8): G09G3/36
CPCG09G3/3648G09G3/3696G09G2330/027
Inventor 张瑞斌卢建宏
Owner NANJING CEC PANDA LCD TECH