Source driving method for liquid crystal display and driving device
A liquid crystal display, source-driven technology, used in static indicators, instruments, etc., can solve the problems of irregular polarity, noise, and inability to judge the effective picture in advance, and achieve the effect of eliminating differences and eliminating display noise.
Inactive Publication Date: 2011-04-27
BOE TECH GRP CO LTD +1
View PDF0 Cites 6 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
However, since the TCON after the reduction of the storage module cannot store the data of a row of pixels (only about 1 / 5 row of pixels can be stored), the TCON cannot judge the arrival of a valid frame in advance, and can only wait until the arrival of the valid data. Reset the POL signal
[0007] The problem with this driving method in the prior art is that when the VGA signal is unstable and the total number of lines in a frame is unstable, it is easy to cause the display effect of the first line of a frame to be different from other lines, and display noise occurs.
Although the polarity of the first row of pixels in the second frame is positive and negative alternately, the polarity is irregular, which will generate a DC component in the first row of pixels
In this way, the display effect of the first row of pixels is different from that of other rows, and display noise occurs
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
[0036] Such as image 3 Shown is the timing diagram of the source drive involved in each embodiment of the present invention. A row of pixels in a liquid crystal display includes active pixels and dummy pixels, and a high-level active (Data Enable, referred to as DE) signal is a high-level flat (such as image 3 When the A line in the middle), the effective pixels display, and the DE signal is low (such as image 3 As shown by the line segment B in the middle), it means that the input is an invalid pixel, and the timing controller does not process the invalid pixel. The high level of each DE signal displays a row of pixels. During the blank time between frames (such as image 3 In the C line segment), the DE signal remains low. During the frame-to-frame blanking time, pixels of invalid rows are displayed.
[0037] Such as Figure 4 Shown is the flow chart of the liquid crystal display source driving method of the present invention, including:
[0038] Step 101, when a r...
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 discloses a source driving method for liquid crystal display and a driving device. The method comprises the steps of: step 101, recording the number of invalid pixels in a pixel row displayed currently by a first counter when a row of pixels of a frame of picture is displayed, and adding 1 to the value of the first counter by a second counter when the value of the first counter is larger than the numerical value of the target pixels of the pixel row displayed currently; and step 102, resetting POL (Polarity Inversion) signals when the value of the second counter is larger than or equal to a first preset value. The method and the device, provided by the invention, can eliminate the display effect difference between a first pixel row and other rows, caused by instable VGA (Video Graphics Array) signals, and eliminate display noises.
Description
technical field [0001] The invention relates to drive control technology, in particular to a liquid crystal display source drive method and a drive device. Background technique [0002] In the prior art, the liquid crystal display usually adopts a row inversion driving method. For the mth row of pixels of the liquid crystal display, within the display time of the xth frame, the source driving integrated circuit of the liquid crystal display (the source driving integrated circuit is used to drive the data line of the liquid crystal display The polarity of the signal output by the source driver integrated circuit (SDIC (Source Driver IC) for short) is positive (indicated by +), and the forward voltage is applied on both sides of the liquid crystal (that is, the voltage applied to the pixel electrode is higher than that on the common electrode. Applied voltage); for the pixels in the m+1th row, the polarity of the signal output by SDIC is negative (indicated by -) in the displa...
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): G09G3/36
Inventor 陈明
Owner BOE TECH GRP CO LTD