Polarity-reversal compensation method, device and liquid crystal display

A technology of polarity inversion and compensation method, applied in static indicators, instruments, etc., can solve the problems of affecting the display effect, different brightness, low charging rate, etc., to avoid bright lines and dark lines, and improve the display effect.

Active Publication Date: 2015-07-08
BOE TECH GRP CO LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, since the data signal charging the N rows of inversion pixel rows rises from low level to high level, or falls from high level to low level, it is not stable yet. Therefore, the charging of N rows of inversion pixel rows The rate is lower than the charging rate of the non-inverted pixel rows, so that the brightness of the area corresponding to N rows of inverted pixel rows on the LCD screen is different from the brightness of the area corresponding to the non-inverted pixel rows, resulting in the LCD screen Obvious bright or dark lines appear on the screen, affecting the display effect

Method used

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  • Polarity-reversal compensation method, device and liquid crystal display
  • Polarity-reversal compensation method, device and liquid crystal display
  • Polarity-reversal compensation method, device and liquid crystal display

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Embodiment 1

[0025] see figure 1 , the polarity reversal compensation method provided by the embodiment of the present invention includes:

[0026] Step 101, obtain the data signal corresponding to the inverted pixel row, and obtain the rising phase or falling phase of the data signal according to the data signal; wherein, the data signal is used to charge the pixel, and N rows of inversion need to occur in the pixel When inverting, the data signal also changes accordingly, so that the pixel is charged with a current of the opposite polarity to that before the inversion. For example: inverting the pixel row needs to be reversed from positive polarity to negative polarity, and the data signal is changed from high level to low level; or, inverting the pixel row needs to be reversed from negative polarity to positive polarity, and the data signal is changed from low level goes high. Such as figure 2 , image 3 As shown, DATA is a data signal, and in the B-C stage, inverting the pixel row...

Embodiment 2

[0033] Since the scanning signal is turned on after the rising phase or falling phase of the data signal, the inversion period of the vertical pulse clock signal is the same as the inversion period of the output enable signal, and the non-inversion period of the vertical pulse clock signal is the same as that of the output enable signal. The non-inversion period is the same, therefore, both the inversion period and the non-inversion period of the vertical pulse clock signal need to be calculated and adjusted, such as Figure 4 As shown, the compensation method for polarity reversal provided by the above embodiment also includes:

[0034] Step 103, obtain the duration T1 of one frame, the number N of the reversed pixel rows in one frame, the number H1 of the pixel rows in the display area, the number H2 of the pixel rows in the blank area, and the data The duration of the rising or falling phase of the signal is T2.

[0035] Step 104, according to the T1, N, H1, H2 and T2, cal...

Embodiment 3

[0039] In the embodiment of the present invention, the specific method for calculating the inversion period and the non-inversion period of the vertical pulse clock signal in step 104 in the second embodiment will be described in detail, please refer to Figure 5 , Step 104 in Embodiment 2 can also be refined into Step 1041-Step 1043, including:

[0040] Step 1041, use the formula n=[H1 / N] to calculate the number of inversion times n; wherein, H1 is the number of pixel rows in the display area, the inversion pixel rows exist in the display area, and N is an inversion in one frame The number of inversion pixel rows, the number of inversion times in one frame can be calculated from the formula in this step.

[0041] Step 1042, using the formula T C =(T1-n*T2) / (H1+H2), calculate the non-inversion period T of the vertical pulse clock signal C ; T1 is the duration of one frame, T2 is the duration of the rising phase or falling phase of the data signal, and T1-n*T2 is calculated t...

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Abstract

The invention discloses a polarity-reversal compensation method, device and a liquid crystal display, relates to the technical field of display, and aims at solving the problem that the display effect is poor caused by obvious bright lines and dark lines appearing on a screen of the liquid crystal display. The polarity-reversal compensation method comprises the steps that a data signal corresponding to a reversal pixel row is obtained, and the ascent stage and the descent stage of the data signal is obtained according to the data signal; a vertical pulse clock signal and an output enable signal are set according to the ascent stage and the descent stage of the data signal to enable a scanning signal corresponding the reversal pixel row to be started after the ascent stage or the descent stage of the data signal is finished. The polarity-reversal compensation method is applied to a polarity-reversal compensation device, and the liquid crystal display comprises the polarity-reversal compensation device mentioned in the technical scheme. The polarity-reversal compensation method is used for driving the liquid crystal display to conduct polarity-reversal.

Description

technical field [0001] The invention relates to the field of display technology, in particular to a polarity reversal compensation method, device and liquid crystal display. Background technique [0002] With the development of display technology, liquid crystal display has become one of the mainstream display devices at present. In liquid crystal display, in order to avoid permanent damage caused by polarization of liquid crystal, it is necessary to apply the voltage signal between the liquid crystal capacitor and the storage capacitor The polarity of the polarity is reversed at regular intervals. Among them, N-line inversion is a common way of polarity inversion. The polarity of adjacent N-line inversion pixel rows is reversed, from the original positive pole to negative pole, or from the original negative pole to positive electrode. When performing N-line inversion, the data signal corresponding to the N-line inversion pixel row is inverted, that is, rising from low lev...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/36
Inventor 刘磊董殿正宋嘉嘉
Owner BOE TECH GRP CO LTD
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