Field sequential liquid crystal display driving method and display device

A driving method and technology of liquid crystal display, applied in the direction of static indicators, instruments, etc., can solve problems such as difference in absolute value of data voltage, loss of rotation ability, and liquid crystal not rotating normally.

Active Publication Date: 2014-09-10
TCL CHINA STAR OPTOELECTRONICS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when displaying odd-numbered and even-numbered field images, there are differences in the absolute values ​​of the positive and negative voltages of the data voltages applied across the liquid crystal.
This causes the liquid crystal molecules to be in a DC bias driving state. If a static picture is displayed for a long time, the liquid crystal will be over-polarized and lose its ability to rotate. When other pictures are displayed, the liquid crystal will not be able to rotate normally, resulting in afterimages

Method used

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  • Field sequential liquid crystal display driving method and display device
  • Field sequential liquid crystal display driving method and display device
  • Field sequential liquid crystal display driving method and display device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] figure 1 It is a schematic structural diagram of a field sequential liquid crystal display device according to this embodiment. like figure 1 As shown, the liquid crystal display device 100 includes a display panel 110 , a scan driving unit 120 , a data driving unit 130 , an image analysis unit 140 , a timing control unit 150 , a main control unit 160 and a backlight module 170 . The backlight module 170 is disposed at the rear of the display panel 110 to provide a light source for the display panel 110 . The display panel 110 includes a plurality of pixels 112 arranged in a matrix, and each pixel 112 includes a plurality of sub-pixel units. In addition, the backlight module 170 in this embodiment includes a white backlight (W) and a red backlight (R), figure 1 not shown.

[0037] The scan driving unit 120 and the data driving unit 130 are respectively electrically connected to the display panel 110 . The timing control unit 150 is electrically connected to the sca...

Embodiment 2

[0064] This embodiment is basically the same as Embodiment 1. The difference is that, as Figure 5 As shown, the pixel 112 in this embodiment includes two sub-pixel units arranged in parallel, namely a magenta sub-pixel unit (M) and a cyan sub-pixel unit (C). Moreover, the backlight module 170 in this embodiment includes a yellow backlight (Y) and a blue backlight (B).

[0065] Wherein, the yellow backlight passes through the magenta sub-pixel unit (M) to display a red (R) image, and passes through the cyan sub-pixel unit (C) to display a green (G) image. After the blue backlight passes through the magenta sub-pixel unit (M) and the cyan sub-pixel unit (C), a blue image is displayed.

[0066] Therefore, the image analysis unit 140 in this embodiment is used to decompose each frame of image into first image data and second image data. In this embodiment, when the yellow backlight source (Y) emits light, the first part of the data driving signal is provided to multiple sub-pi...

Embodiment 3

[0082] The pixels in the FSC-LCD liquid crystal panel in the prior art usually do not include sub-pixels for color filtering, but provide red, green, and blue color fields through the backlight module and display red, green, and blue in time sequence. Three-color image information. In this embodiment, a driving method is provided to eliminate afterimages.

[0083] Figure 8 is a schematic diagram of the inversion driving method of the FSC-LCD according to this embodiment. The color field sequence signal makes the backlight module generate red, green and blue color fields in one frame period. In the three color fields of the same frame period, the data voltage polarities of the pixels are the same. In the three color fields of adjacent frame periods, the polarities of the data voltages of the pixels are opposite.

[0084] Please refer to Figure 8 , where Vcom is the reference voltage. In the R color field of the Nth frame, the signal voltage Vd on the pixel electrode is ...

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Abstract

The invention discloses a field sequential liquid crystal display driving method and a display device. The method comprises steps of providing a color field sequential signal to enable a backlight module to generate a plurality of color fields in one frame period respectively and providing a data driving signal to each sub-pixel unit of one pixel in the condition when each color field is effective respectively so as to open the sub-pixel unit corresponding to the color field, wherein polarity of the data driving signal is reversely rotated periodically to enable the voltage waveform to be symmetrical in relative to common reference voltage.

Description

technical field [0001] The present invention relates to the field of display technology, in particular to a field sequence liquid crystal display driving method and a display device. Background technique [0002] In the prior art, field sequential liquid crystal display (Field Sequential Color LCD, FSC-LCD) does not need to use color filters, and provides red, green, and blue color fields through the backlight module, and uses time sequence to display red, green, and blue. Blue three-color image information, so that through the method of temporal color mixing, the color image is displayed on the retina by using the persistence of vision of the human eye. Therefore, FSC-LCD has the advantages of high light efficiency, high resolution and low cost, and has become the main trend of LCD development. [0003] Generally, if the liquid crystal molecules are operated at a certain fixed voltage for a long time, the characteristics of the liquid crystal molecules will be cured. When...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/36
CPCG09G3/3406G09G3/3607G09G2300/0452G09G2310/0235G09G3/3614G09G2310/08G09G3/2003
Inventor 康志聪樊勇
Owner TCL CHINA STAR OPTOELECTRONICS TECH CO LTD
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