CN110738973A

CN110738973A - panel driving method

Info

Publication number: CN110738973A
Application number: CN201910847813.7A
Authority: CN
Inventors: 谢建峰; 熊克; 郭平昇; 刘少凡
Original assignee: Fujian Huajiacai Co Ltd
Current assignee: Fujian Huajiacai Co Ltd
Priority date: 2019-09-09
Filing date: 2019-09-09
Publication date: 2020-01-31

Abstract

kinds of panel driving method, the panel includes the display block aligned in the column, the display block scans and drives row by row, the high level action time of the grid scanning line is 1 unit row scanning interval, through the above scheme, the invention has and only has the display pixel of the last rows and the first rows appears the coupling fluctuation situation when driving the grid to each display block, reduce the size of bright dark stripe, thus has improved the problem of the bright line of the horizontal stripe.

Description

panel driving method

Technical Field

The invention relates to a panel driving method design, in particular to panel driving methods capable of improving the problem of panel cross striation.

Background

For the lcd with touch and display functions integrated in , the capacitive coupling effect may cause many display defects, and is unavoidable, and in , in some special frames, the lcd may have abnormal display conditions, for example, in fig. 1, in , the lcd normally displays on the left side, no bright line is generated, and on the right side, in , many equally spaced bright lines are generated, so that -induced height of the bright lines and the display area can be seen.

Disclosure of Invention

Therefore, it is necessary to provide new panel driving method designs to achieve the effect of improving the bright lines of the horizontal stripes displayed on the panel.

To achieve the above object, the inventors provide panel driving methods, wherein the panel comprises column-aligned display blocks, the display blocks are driven by row-by-row scanning, and the high-level action time of the gate scanning lines is 1 unit row scanning interval.

Specifically, the display area of the panel is a touch unit.

Further , the rising edge of the previous stage gate scan line is coincident with the falling edge of the upper stage scan line, and the falling edge of the previous stage scan line is coincident with the rising edge of the lower stage scan line.

Further , the rising edge of the th level gate scan line of the display tile is coincident with the falling edge of the last level scan line of the top display tile.

Through the scheme, when each display block is subjected to gate driving, coupling fluctuation occurs in the display pixels of the last rows and the first rows, the generation size of bright and dark stripes is reduced, and the problem of bright lines of transverse stripes is solved.

Drawings

FIG. 1 is a comparison graph of the bright line effect of the horizontal stripes in the background art;

FIG. 2 is a schematic diagram illustrating display area division according to an embodiment;

FIG. 3 is a schematic diagram of gate driving waveforms according to an embodiment;

fig. 4 is a schematic diagram of gate driving waveforms according to an embodiment.

Detailed Description

To explain technical contents, structural features, and objects and effects of the technical solutions in detail, the following detailed description is given with reference to the accompanying drawings in conjunction with the embodiments.

In the lcd industry, due to the capacitive coupling effect, many abnormal display problems may be caused, when the coupling effect of Gate to VCOM is prominent, the manufacturing cost is high for changing the manufacturing process, including the problem of equidistant stripes in some special pictures (such as flicker pictures), which is unavoidable, and the manufacturing process may be improved, but the cost for improving the manufacturing process is high, and the debugging of the machine may be more troublesome, and the stability of the panel is poor. This patent is through changing the shape of GATE wave form, adjusts the opening time of GATE promptly/carries out the chamfering to the GATE, can improve liquid crystal display and appear equidistant band bright line problem under the special picture, reduces the processing procedure and improves the cost, removes the trouble that improves the processing procedure and need debug the board from, improves the stability of panel.

FIG. 2 is a schematic diagram of a display area, and correspondingly, in some cases, the whole panel AA is divided into a plurality of display areas, for example, according to the functional requirements of the touch screen, the display area of the panel is divided into a plurality of touch units (Sensor), and the grid scan lines of the display area are connected with the voltage comparison of Vcom.

FIG. 3 is a diagram of waveforms of normal gates, 4H is taken as an example, for LCDs with different resolutions, each Sensor Pad corresponds to a corresponding number of pixels, i.e. to a corresponding number of Gate lines, for example, for an LCD with 720RGB 1520 resolution, pixels in each Sensor Pad have 40(Y) 45(X) pixels, and thus this Sensor Pad corresponds to 40 gates, for example, for an LCD with 720RGB 1520 resolution, the coupling effect of the leading Gate (G1-G36) to VCOM is cancelled out, i.e. the coupling effect of the leading Gate +4 to the upper VCOM voltage is cancelled out, but for a TDDI LCD having a Sensor fault, the lower Sensor pads are not affected by the coupling of the upper Sensor pads, and therefore the coupling effect of the last Gate Pad to the VCOM Gate line is not more affected by the coupling effect of the corresponding voltage of the rising VCOM Gate lines, i.e. the luminance of the visual voltage difference between the upper VCOM Gate line, the upper VCOM line is increased, and the luminance of the VCOM line is increased when the VCOM voltage difference between the upper VCOM line 585 and the VCOM Pixel line is smaller than the luminance of the corresponding voltage, the corresponding voltage difference between the upper VCOM line, the luminance of the VCOM line, thus the luminance of the VCOM line is increased when the VCOM line, the VCOM line is displayed by the luminance difference between the bright line, the luminance difference between the VCOM line, the luminance of the VCOM line, the VCOM line is increased, the VCOM line is shown by the VCOM line, the luminance difference between the VCOM line, the VCOM line is increased when the VCOM line, the VCOM line is shown by the luminance difference between the VCOM line, the VCOM line.

FIG. 4 is a schematic diagram of waveforms between GATE and VCOM after improvement, as shown in FIG. 4, after CK High is changed from 4H to 1H, in Sensor Pad 1, only the Pixel of G40 is coupled by the falling edge of the GATE to cause the voltage difference between the voltage on the Pixel electrode and the Vcom voltage to become larger, forming 1 bright line, in Sensor Pad 2, only the Pixel of G41 is coupled by the rising edge of the GATE to cause the voltage difference between the voltage on the Pixel electrode and the Vcom voltage to become smaller, forming a dark line, when CK High is reduced to 1H (the time of 1H is not as long as 2 due to the difference in resolution of the liquid crystal display panel, H time is the time for charging the Pixel in the Pixel plane by the actual data line dataline), the coupling effect of the GATE to VCOM will be reduced to the minimum, thus improving the display quality of the liquid crystal display panel, such that the normal display panel can be displayed with the gray level of FIG. 1H, and the gray level of the Pixel can be set to be higher than the display panel when the Pixel is driven by the rising edge of the rising line of the rising edge of the GATE line of the GATE of the Pixel, wherein the Pixel, the Pixel is reduced by the Pixel, the Pixel is set to be able to be better, the Pixel driving of the Pixel driving stage when the Pixel driving stage of the display panel, the display.

It should be noted that, although the above embodiments have been described herein, the invention is not limited thereto. Therefore, based on the innovative concepts of the present invention, the technical solutions of the present invention can be directly or indirectly applied to other related technical fields by making changes and modifications to the embodiments described herein, or by using equivalent structures or equivalent processes performed in the content of the present specification and the attached drawings, which are included in the scope of the present invention.

Claims

The panel driving method is characterized in that the panel comprises display blocks aligned in columns, the display blocks are driven by scanning line by line, and the high level action time of a grid scanning line is 1 unit line scanning interval.
2. The panel driving method according to claim 1, wherein the display area of the panel is a touch unit.
3. The panel driving method of claim 1, wherein a rising edge of a current stage gate scan line acts simultaneously with a falling edge of an upper stage scan line, and a falling edge of the current stage scan line acts simultaneously with a rising edge of a lower stage scan line.
4. The panel driving method of claim 1, wherein a rising edge of the th-stage gate scan line of the display block is simultaneous with a falling edge of the last-stage scan line of the upper display block.