CN101174384A - Image driving method and system and liquid crystal display using the same - Google Patents

Abstract

The present invention discloses an image driving method and system thereof and a liquid crystal display using the same. The image driving method includes performing an overdrive operation on a pixel of a primary color on a flat panel display, and providing respective overdrive corresponding tables to different pixels according to different primary colors, so that the response time of the optical transmission medium transmitting each primary color light is different to eliminate the residual image color difference. In addition, an overdrive operation can be divided into multiple sub-overdrive operations to enhance the operation effect. This method can eliminate the residual image color difference caused by the different generation time of each primary color light of the scanning backlight module on the flat panel display. The image driving system includes an overdrive circuit module and a display. The liquid crystal display includes an overdrive circuit module, a source drive circuit, a gate drive circuit and a thin film transistor liquid crystal panel.

Description

Image driving method and system thereof, and liquid crystal display using same

technical field

The invention relates to a driving method and its system and a liquid crystal display using the same, in particular to an image driving method and its system and a liquid crystal display using the same.

Background technique

The backlight modules of the existing liquid crystal flat panel display are divided into two types: hold type and scan type. The hold-on backlight module is continuously on to supply the light source for the liquid crystal display panel. This hold-on backlight module has proved to have a major disadvantage, that is, insufficient response to moving images. When a fast moving image is displayed on the screen, because the switching response time of the liquid crystal pixel unit is too slow, the image will not be converted in time, and a shadow with a lighter grayscale will appear behind the moving object, which is the so-called afterimage phenomenon.

Figure 1 illustrates the dynamic image response curve (MPRC) of the hold-type backlight module. This figure is the result obtained by using a moving speed of 167 pixel/frame. The vertical axis of this figure represents the brightness after normalization. This brightness value It is generally divided into 0~225, where the brightness value is converted from 96 gray levels to 192 gray levels and normalized to 0~1. The horizontal axis represents the relative position between the pixels. For example, 600 is the pixel on the left side of the display panel, 1000 is the pixel on the right side of the display panel, and 800 is the pixel in the middle of the display panel. The dynamic image response curve is a simulation curve drawn with reference to light generation time, liquid crystal pixel unit switching time, and human visual response. FIG. 1 illustrates the afterimage phenomenon generated when the object moves from the horizontal axis 600 to the horizontal axis 1000 in an environment where the brightness value of the moving object is 96 and the background brightness value is 192. So the pixels on the left show the background, and the pixels on the right show the moving object. We can find that there is an oblique curve region between the background brightness value of 192 and the object brightness value of 96, and this curve region is located from pixel 700 to pixel 900. The oblique curve area shows a lighter gray scale than the object because the brightness is between the background and the object. Here, there is a blurred area between the background and the object, which is the so-called afterimage phenomenon. Therefore, because the switching response speed of the liquid crystal pixel molecules is not fast enough, although the object has moved to the right and displays a normal brightness of 0, the middle part still displays a light gray-scale brightness between 0 and 1. In addition, the structure of the holding type backlight module is in the form of continuous lighting. Because the cold cathode fluorescent lamp (CCFL) in the backlight module continuously hits the phosphor powder to continuously produce various primary colors, it is not affected by the excitation time of the phosphor powder. Therefore, each primary color There is no difference in the emission time, so the curves in Figure 1 can be regarded as the light curves of the three primary colors of red, green and blue, or as the curves formed by the superposition of the three primary colors of red, green and blue.

U.S. Patent No. 6,927,766 discloses an image display device, which includes a display area composed of pixels that can control light transmission and reflection, and a light emission area that can perform address scanning and flash at a fixed frequency. This device is The scanning backlight module of the existing liquid crystal display panel, this scanning backlight module is to simulate the principle of cathode ray tube (CRT) to solve the afterimage problem, and the scanning backlight module uses the same frequency as the general signal source to flicker at 60 Hz to increase Image conversion efficiency.

FIG. 2 shows the dynamic image response curve of the scanning backlight module. This figure shows that the scanning backlight module and the holding backlight module in FIG. 1 are tested under the same image conditions. Figure 2 shows three curves, which are green light dynamic image response curve 201, red light dynamic image response curve 202, and blue light dynamic image response curve 203. Since the green light curve 201 is too close to the red light curve 202, it is shown in Fig. 2. The red and green light only shows a curve. The oblique areas of the dynamic image response curves of the three primary colors are from pixel 780 to pixel 900. It can be clearly seen that the oblique areas of the three primary colors are narrowed and steep, and the dynamic image response curves of the three primary colors do not overlap each other. Narrowing means that the afterimage area is reduced, but non-overlapping means that there is chromatic aberration in the afterimage part. Because the scanning backlight module flickers at a fixed frequency, the cold-cathode fluorescent lamp of the backlight module excites the phosphor powder at a fixed frequency every time to emit light, but the time for each color phosphor powder of the cold-cathode fluorescent lamp to be excited to emit the required brightness is different. , so the dynamic image response curves of the three primary colors do not overlap. Fig. 3 is the luminescence curves of the excited phosphors of various colors in the cold cathode fluorescent lamp, which are respectively the luminescence curve 301 of the green phosphor, the luminescence curve 302 of the red phosphor, and the luminescence curve 303 of the blue phosphor, the vertical axis shows the brightness and the horizontal axis shows Time, brightness and the highest value after normalization are represented by 1. It can be seen from FIG. 3 that the blue activation curve 303 shows that the degree of activation and activation of the blue phosphor at T31 and the degree of normal recovery at T32 are the fastest among the three colors of light, so the blue light dynamic image response curve 203 in FIG. 2 is different from the other two The curves have obvious separation phenomenon. Although the afterimage area is reduced after switching to the scanning backlight module, the afterimage will cause chromatic aberration. More specifically, there will be a bluish afterimage here. This phenomenon is very unnatural to human daily vision.

Figure 4 illustrates the dynamic image response curve of the three primary colors generated by moving from the horizontal axis 650 to the horizontal axis 950 in an environment with an object brightness value of 192 and a background brightness value of 96. The difference from Figure 2 is that the object brightness is higher than the ambient brightness at this time. The dynamic image response curves of the three primary colors are respectively green light dynamic image response curve 401, red light dynamic image response curve 402, and blue light dynamic image response curve 403, where the blue light dynamic image response curve is lower than the red and green light, because of the blue The activation and recovery time of the phosphor powder is short, so it can quickly reach low brightness, but therefore there will be a reddish green afterimage. Therefore, although the scanning backlight reduces the area of the afterimage, the chromatic aberration of the afterimage appears. Regardless of FIG. 2 or FIG. 4 , the discolored afterimage will make the viewer of the panel feel very unnatural, thus degrading the display quality.

Contents of the invention

The object of the present invention is to provide an image driving method, which performs an overdrive operation on each pixel of a different primary color, and divides it into multiple overdrive operations and corresponds to a plurality of overdrive corresponding tables, so that the light of different primary colors The response time of the transmission medium is different, so as to eliminate the residual image color difference caused by the different generation time of each primary color light in the scanning backlight module on the flat panel display.

Yet another object of the present invention is to provide an image driving method that provides different overdrive corresponding tables for different primary colors to perform different overdrives, so that the response times of the optical transmission media that transmit different primary colors are different, so as to eliminate the overdrive on the flat panel display. The residual image color difference caused by the different generation time of each primary color light in the scanning backlight module.

Another object of the present invention is to provide an image driving system that provides a plurality of overdrive corresponding tables for primary color signals to eliminate residual color aberration.

Another object of the present invention is to provide an image driving system that provides different overdrive corresponding tables for different primary color signals to perform different overdrives to eliminate residual image color aberration.

Yet another object of the present invention is to provide a liquid crystal display that provides a plurality of overdrive comparison tables for primary color signals to eliminate residual image color difference caused by different primary color light generation times.

Yet another object of the present invention is to provide a liquid crystal display, which provides different overdrive comparison tables for different primary color signals, and eliminates residual image color difference caused by different primary color light generation times.

The invention proposes an image driving method, which includes providing a plurality of different overdrive corresponding tables for a primary color. When the primary color of a pixel performs an overdrive operation, the overdrive can be divided into multiple overdrive operations, and multiple overdrive operations are performed referring to different ones of the multiple overdrive corresponding tables of the primary color. .

According to a preferred embodiment of the present invention, the above method may include providing different overdrive corresponding tables for different primary colors, so that the response time of the optical transmission medium transmitting light of different primary colors is different.

The present invention further proposes an image driving method, which provides different overdrive corresponding tables for different primary colors, thereby performing different overdrive operations, so that the response times of the optical transmission media transmitting different primary colors are different.

According to a preferred embodiment of the present invention, the above method may include making the reaction time of the light transmission medium for transmitting blue light longer than the reaction time of the light transmission medium for transmitting red light or green light, and at the same time, the light transmission medium for transmitting each primary color light The optical transmission medium is liquid crystal.

The invention further proposes an image driving system, which includes an over-excitation driving circuit module and a display. The overdrive circuit module includes a plurality of overdrive lookup table circuits and receives image signals. At least one primary color signal of the image signals is converted and output by at least two overdrive lookup table circuits at different timings to output an overdrive with at least two secondary overdrive signals. video signal. The display is electrically coupled to the overdrive circuit module, and the display displays images by receiving the overdrive image signal.

The invention also proposes an image driving system, including an over-excitation driving circuit module and a display. The overdrive circuit module includes a plurality of overdrive look-up table circuits and receives image signals. Multiple primary color signals of the image signals are respectively converted by different overdrive look-up table circuits to output an overdrive image signal containing different overdrive drive signals. The display is electrically coupled to the overdrive circuit module, and the display displays images by receiving the overdrive image signal.

The present invention further proposes a liquid crystal display, including an overexcitation drive circuit module, a source drive circuit, a gate drive circuit, and a liquid crystal panel. The over-excited drive circuit module includes a plurality of over-excited drive look-up table circuits and receives image signals. At least one primary color signal of the image signal is converted and output by at least two over-excited drive look-up table circuits at different timings and contains at least two secondary over-excited drive signals. Overdrive video signal. The liquid crystal panel contains a plurality of thin film transistors and a plurality of liquid crystal molecules. The gate and source of the thin film transistors are coupled to the gate drive circuit and the source drive circuit to receive control signals and overdrive image data signals. The control signals and overdrive image data The signals are combined to drive the thin film transistors, and the thin film transistors apply voltages to corresponding liquid crystal molecules to display images.

The present invention further provides a liquid crystal display, including an overexcitation driving circuit module, a source driving circuit, a gate driving circuit and a liquid crystal panel. The overdrive circuit module includes a plurality of overdrive look-up tables and receives image signals. Multiple primary color signals of the image signals are respectively converted by different overdrive look-up tables to output an overdrive image signal containing different overdrive signals. The liquid crystal panel contains a plurality of thin film transistors and a plurality of liquid crystal molecules. The gates of the thin film transistors are coupled to the gate drive circuit and the source drive circuit to receive the control signal and the overdrive image data signal. The control signal and the overdrive image data signal The combination is used to drive the thin film transistors, and each thin film transistor applies voltage to the corresponding liquid crystal molecules to display images.

The present invention adopts the over-excited drive operation on the pixels of each primary color, and corresponds to different over-excited drive corresponding tables, so that the response time of the optical transmission medium that transmits different primary colors is different, so the scanning backlight module on the flat-panel display can be eliminated. The afterimage color difference caused by the different generation time of primary color light.

In order to make the above and other objects, features and advantages of the present invention more comprehensible, preferred embodiments are specifically cited below and described in detail with reference to the accompanying drawings.

Description of drawings

FIG. 1 is a dynamic image response curve of a display panel of a hold-type backlight module at a moving object brightness value of 96 and a background brightness value of 192. Referring to FIG.

FIG. 2 is a dynamic image response curve of the display panel of the scanning backlight module at a moving object brightness value of 96 and a background brightness value of 192. FIG.

Fig. 3 is a time chart of the generation of each primary color light of the cold cathode fluorescent lamp.

FIG. 4 is a dynamic image response curve of the display panel of the scanning backlight module at a moving object brightness value of 192 and a background brightness value of 96.

FIG. 5A is a clock diagram of an input image signal according to an embodiment of the present invention.

FIG. 5B is a clock diagram for overdrive of pixels with red and green light according to an embodiment of the present invention.

FIG. 5C is a clock diagram of an overdrive of a pixel by blue light according to an embodiment of the present invention.

FIG. 6A is a clock diagram of an input video signal.

FIG. 6B is a clock diagram for overdrive of pixels with red, green and blue light after the image signal in FIG. 6A is input.

FIG. 7 is a dynamic image response curve of the present embodiment at a moving object brightness value of 96 and a background brightness value of 192.

FIG. 8 is a dynamic image response curve of the present embodiment at a moving object brightness value of 192 and a background brightness value of 96.

FIG. 9A is a clock diagram of an input video signal according to another embodiment of the present invention.

FIG. 9B is a clock diagram of overdrive of pixels with red and green light according to another embodiment of the present invention.

FIG. 9C is a clock diagram of overdrive of pixels by blue light according to another embodiment of the present invention.

FIG. 10 is a circuit block diagram of an image driving system according to an embodiment of the present invention.

FIG. 11 is a circuit block diagram of an image driving system according to another embodiment of the present invention.

FIG. 12 is a circuit block diagram of a liquid crystal display according to an embodiment of the present invention.

FIG. 13 is a circuit block diagram of a liquid crystal display according to another embodiment of the present invention.

Description of reference symbols

1000, 1100: image drive system

1001～1004, 1101, 1102, 1201～1204, 1301, 1302: overexcitation drive comparison table circuit

10A, 11A, 12A, 13A: overexcitation drive circuit module

10B, 11B: display

12B, 13B: source drive circuit

12C, 13C: gate drive circuit

12D, 13D: LCD panel

1200, 1300: LCD display

1211, 1212, 1311, 1312: transistors

1221, 1222, 1321, 1322: liquid crystal molecules

201, 401, 801: green light dynamic image response curve

202, 402, 802: red light dynamic image response curve

203, 403, 803: Blu-ray dynamic image response curve

301: Green light generation curve

302: Red light generation curve

303: Blue light generation curve

T50, T51, T510, T52, T520, T60, T62, T620, T90, T93, T930: time

R: red

G: green

B: blue

Detailed ways

Fig. 5A, Fig. 5B, and Fig. 5C are the clock diagrams of the video signal and the pixel driving of each primary color light according to the embodiment of the present invention. The clock diagram shows that when the video signal changes from a luminance value of 96 to a luminance value of 192, the pixel performs overdrive The point in time of the applied voltage. FIG. 5A is a clock diagram of an image signal after frequency multiplication processing, FIG. 5B is a clock diagram of an overdrive by red and green pixels, and FIG. 5C is a clock diagram of an overdrive by blue pixels. This embodiment is a pixel driving method of a flat panel display of a scanning backlight module. The flat panel display is a liquid crystal flat panel display, so the light transmission medium is liquid crystal. The pixel driving method adopted in this embodiment provides multiple different overdrive corresponding tables for a certain primary color, so there are different multiple overdrive corresponding tables for the three primary colors of red, green and blue. And when an overdrive operation is performed, it is divided into a plurality of overdrive operations. Among them, when the red, green, and blue primary color pixels perform one overdrive, it can be divided into two overdrives. The red, green, and blue pixels perform the first overdrive at the time point T51, and perform the second overdrive at the time point T52. Two secondary overdrives, and the two secondary overdrives of this pixel respectively correspond to different overdrive corresponding tables. The red, green, and blue lights have different overdrive correspondence tables, so that the response times of the optical transmission media that transmit different primary colors of light are different.

For the design principle of this embodiment, please refer to FIG. 6A and FIG. 6B. FIG. 6A is a clock diagram of an image signal with an input frequency of 60 Hz. FIG. 6B is a clock diagram of the red, green and blue primary colors performing the same overdrive, wherein the origin is to T60 is the input time of the initial video signal, the brightness value of the initial video signal is 96, and the initial brightness value of the red, green and blue light is also 96. T62 is another time point when the video signal is input. Since the frequency of the video signal is 60 Hz, the time distance from the origin to T62 is 16.67 milliseconds, and T62 to T620 are the time when the video signal is input. The image signal input at T62 indicates that the display area needs to reach a brightness value of 192. Considering the longer response time of the pixel, the red, green and blue light performs an overdrive at T62. We make an overdrive correspondence table between the indication of the input image signal and the operation of the pixel voltage. When the image signal indicates that the brightness of a certain display area needs to be 192, the voltages of the three primary color pixels are all required to perform overdrive to increase the brightness to 202. voltage. Therefore, each luminance value indicated by each image signal will correspond to a different pixel voltage on the overdrive correspondence table. Because the light generation time of each color light is different, the response time of the pixel is enhanced by increasing the voltage to increase the display effect. .

However, in order to increase the voltage driving effect of the overdrive, we can double the frequency of the image signal before inputting it. After the frequency of the image signal is doubled, the overdrive performed by the pixel voltage can be divided into two overdrives. Fig. 5A, Fig. 5B, and Fig. 5C are examples of dividing into two overexcited drives. Fig. 5A is the image signal after frequency doubling. The time distance from the time origin to T51 is 8.3 milliseconds, and the calculated frequency here is 120 Hz. . Here, we use the frequency multiplication of the same video signal as in FIG. 6A to obtain the video signal in FIG. 5A , and in FIG. 5A , the origin to T50 , T51 to T510 , and T52 to T520 are the input times of the video signal. Because of frequency doubling, the increase of the brightness value of the input video signal is divided into two stages, the initial brightness value is 96 from the origin to T50, the brightness value is increased to 192 from T51 to T510, and the brightness value is still 192 from T52 to T520.

Wherein, the initial brightness value of the video signal is 96, and the initial brightness value of the red, green and blue lights is also 96. The video signal indicates that the luminance value needs to reach 192 from T51 to T510. In order to eliminate the residual image and color difference phenomenon, this embodiment separates the red and green light and the blue light to perform overdrive and each has a different overdrive corresponding table. Among them, the pixels of red and green light Execute the first overdrive from T51 to T510, which corresponds to its own overdrive correspondence table. At this time, the red and green pixels need to be given a voltage with a brightness value of 202, and the blue pixels also perform the first overdrive from T51 to T510. The pixels of blue light are driven according to their own overdrive corresponding table, and the pixels of blue light are given a voltage with a brightness value of 198.

Then, the image signal indicates that the display area still has a brightness value of 192 from T52 to T520. At this time, the pixels of red and green light and the pixels of blue light are still driven separately, and the pixels of red and green light perform the second overdrive from T52 to T520. , corresponding to its own overdrive correspondence table, at this time the red and green pixels are still given a voltage with a brightness value of 202, and the blue pixels also perform the second overdrive from T52 to T520, but the blue pixels are based on Another overdrive corresponding table itself, where the pixels of blue light are given a voltage with a brightness value of 202. Therefore, in this embodiment, different overdrive corresponding tables are provided for different primary colors, so that the response times of the optical transmission media transmitting light of different primary colors are different. Therefore, the pixels of red and green light first perform an overdrive to reach the voltage required for the brightness of 202, while the pixels of blue light first perform an overdrive to reach the voltage required for the brightness of 198. Here, the lower overdrive voltage of the pixel for blue light lies in The reaction time of the light transmission medium that transmits the blue color light is made longer than the reaction time of the light transmission medium that transmits the red color light or the green color light.

Here, two different sub-overdrive voltages are respectively applied to the two sub-overdrives of the pixels of blue light, and the same overdrive voltage is applied to the pixels of red and green lights. It can be seen that, when performing multiple times of overdrive operations, only a part of the primary colors need to have multiple different overdrive comparison tables, so that the response time of the optical transmission medium of this primary color is different from that of other primary colors. It is enough to compensate for the difference in the light generation time of each color light to eliminate the residual image aberration phenomenon.

Therefore, each image signal indicates that each luminance value will correspond to a different pixel voltage on the overdrive corresponding table of each primary color light, and the pixels of the same primary color light have their own overdrive voltage corresponding table for each secondary overdrive voltage. This enhances the response time of the pixel by increasing the voltage to compensate for the difference in the generation time of each color light, thereby increasing the display effect. The implementation of one overdrive here is not limited to being divided into two sub-overdrives, it can be divided into multiple overdrives and the red and green lights can also be overdriven separately.

Fig. 7 shows the moving image response curve (MPRC) of moving object brightness value 96 and background brightness value 192 on the flat panel display for this embodiment, this curve is the curve of three primary color light superimpositions, the problem of afterimage chromatic aberration has been overcome here. And Fig. 8 is the dynamic image response curve (MPRC) of moving object brightness value 192 and background brightness value 96 on the flat panel display for this embodiment, can see green light dynamic image response curve 801, red light dynamic image response curve 802, and The gap between the blue light dynamic image response curve 803 is very small, so the problem of chromatic aberration of afterimage can be effectively solved.

Fig. 9A, Fig. 9B, and Fig. 9C are the clock diagrams of the video signal and the pixel driving of each primary color light according to another embodiment of the present invention. The point in time at which the applied voltage is overdriven. FIG. 9A is a clock diagram of an image signal, FIG. 9B is a clock diagram of an overdrive by red and green pixels, and FIG. 9C is a clock diagram of an overdrive by blue pixels. This embodiment is also a pixel driving method of a flat panel display of a scanning backlight module. The flat panel display is a liquid crystal flat panel display, so the light transmission medium is liquid crystal. The difference between FIGS. 9A-9C and FIGS. 5A-5C is that the clock diagrams in FIGS. 9A-9C show that the pixels of the red, green, and blue primary colors only perform overdrive, and do not divide the overdrive into multiple overdrives.

The input time of the image signal in FIG. 9A is from the origin to T90 and from T93 to T930. From the origin to T90, the initial brightness of each primary color pixel is 96, and the brightness of each primary color pixel from T93 to T930 needs to reach 192. Here, the initial brightness from the origin to T90 red, green and blue light is 96. However, from time T93 to T930 , the pixels of red and green lights and the pixels of blue light are respectively overdriven differently. From T93 to T930, red and green pixels are over-driven, and a voltage with a brightness value of 202 is applied according to the red-green over-drive table. From T93 to T930, the blue light pixels are over-driven, and a voltage with a brightness value of 198 is applied according to the blue light over-drive comparison table. Here, different voltages can be applied to the pixels passing the red and green light and the pixels passing the blue light by virtue of the difference in the overdrive comparison tables of the red, green and blue light, thereby enhancing the response time of the pixels. Therefore, different overdrive corresponding tables are provided for different primary colors, so that the response time of the optical transmission medium that transmits different primary color light is different, and the response time of the optical transmission medium that transmits blue light is longer than that of the light transmission medium that transmits red or green light. Response time of the optical transmission medium. Therefore, the difference in the light generation time of each color light can be compensated, thereby eliminating the afterimage aberration phenomenon. The present invention is not limited to frequency doubling.

FIG. 10 is a circuit block diagram of an image driving system 1000 according to an embodiment of the present invention. The image driving system 1000 includes an overdrive circuit module 10A and a display 10B, and the overdrive circuit module 10A includes overdrive look-up table circuits 1001 - 1004 . The overdrive circuit module 10A is used to receive an image signal, and the 60HZ red light signal of the image signal is respectively converted and output by two 120HZ red light secondary overdrive signals by the overdrive look-up table circuits 1001 and 1002 . The blue light signal of the video signal is converted by the overdrive look-up table circuits 1003 and 1004 at different timings to output an overdrive video signal including two blue light secondary overdrive signals. The display 10B displays images by receiving image signals including two red light and blue light sub-overdrive signals.

FIG. 11 is a circuit block diagram of an image driving system 1100 according to another embodiment of the present invention. An image driving system 1100 includes an overdrive circuit module 11A and a display 11B. The overdrive circuit module 11A includes overdrive look-up tables 1101 and 1102 . The overdrive circuit module 11A is used to receive an image signal, the 60HZ red light signal and the 60HZ blue light signal of the image signal are respectively converted by the overdrive lookup table circuits 1101 and 1102 to output the overdrive image signal including the 60HZ red light and 60HZ blue light overdrive signal . The display 11B displays an image by receiving the overdrive image signal.

FIG. 12 is a circuit block diagram of a liquid crystal display 1200 according to an embodiment of the present invention. The liquid crystal display 1200 includes an overdrive driving circuit module 12A, a source driving circuit 12B, a gate driving circuit 12C and a liquid crystal panel 12D. The over-excited drive circuit module 12A includes over-excited drive look-up table circuits 1201-1204 for receiving image signals, the over-excited drive circuit module 10A is used for receiving an image signal, and the 60HZ green light signal of the image signal is respectively transmitted by the over-excited drive look-up table circuit 1201, 1202 converts and outputs two 120HZ green light secondary overexcitation drive signals. The blue light signal of the image signal is converted by the overdrive look-up table circuits 1203 and 1204 at different timings to output an overdrive video signal including two blue light sub-overdrive signals. The liquid crystal panel 12D includes thin film transistors 1211, 1221 and liquid crystal molecules 1212, 1222. The gates of the thin film transistors 1211, 1221 are coupled to the gate drive circuit 12C to receive control signals, and the sources of the thin film transistors 1211, 1221 are coupled to The source driving circuit 12B receives the overdrive image data signal, and drives the thin film transistors 1211 and 1221 by combining the control signal and the overdrive image data signal, and the thin film transistors 1211 and 1221 respectively apply voltages to the corresponding liquid crystal molecules 1221 and 1222 to display images .

FIG. 13 is a circuit block diagram of a liquid crystal display 1300 according to another embodiment of the present invention. The liquid crystal display 1300 includes an overdrive driving circuit module 13A, a source driving circuit 13B, a gate driving circuit 13C and a liquid crystal panel 13D. The over-excited drive circuit module 13A is used to receive video signals. The over-excited drive circuit module 13A includes over-excited drive look-up tables 1301 and 1302. The 60HZ green light signal and the 60HZ blue-light signal of the video signal are converted and output by the over-excited drive look-up table circuits 1301 and 1302, respectively. 60HZ green light and 60HZ blue light overdrive video signals, and the display 13B displays images by receiving the overdrive video signals. The source driving circuit 13B receives the overdrive image driving signal for providing overdrive image data signals. The gate driving circuit 13C is used to provide control signals. The liquid crystal panel 13D includes thin film transistors 1311, 1321 and liquid crystals 1312, 1322. The gates of the thin film transistors 1311, 1321 are coupled to the gate driving circuit 13C to receive control signals. The thin film transistors 1311 The sources of 1321 and 1321 are coupled to the source drive circuit 13B to receive the over-excited image data signal, and the control signal and over-excited image data signal are combined to drive the thin film transistors 1311 and 1321, and the thin film transistors 1311 and 1321 respectively apply voltages to the corresponding liquid crystal molecules 1312, 1322 to display images.

In summary, in the image driving method and system of the present invention and the liquid crystal display to which it is applied, since the light generation time of each primary color in the backlight module is different, overdrive is used to increase the voltage of the pixel, so that the light of each primary color Simultaneously, images are formed on the display panel, thereby eliminating the phenomenon of afterimage and chromatic aberration.

Although the present invention has been disclosed above with preferred embodiments, it is not intended to limit the present invention. Those skilled in the art can make some changes and modifications without departing from the spirit and scope of the present invention. Therefore, the present invention The scope of protection is based on the claims of the present invention.

Claims (11)

1. image driving method, this image driving method comprises:

Provide a plurality of too drastic driving corresponding tables to a primary colors;

When this primary colors to a pixel carries out too drastic driving operation, should too drastic driving be divided into a plurality of too drastic drivings and operate; And

Make in the described time too drastic driving operation at least two too drastic drivings operations respectively with reference to the different persons in the described too drastic driving corresponding tables.

2. image driving method as claimed in claim 1 is characterized in that also comprising the following steps:

Provide different too drastic driving corresponding tables to different primary colors, so that transmit the reaction time difference of the optical transmission medium of different primary colors coloured light.

3. image driving method as claimed in claim 1 is characterized in that providing two different too drastic driving corresponding tables to this primary colors.

4. image driving method as claimed in claim 3 it is characterized in that this too drastic driving is divided into two too drastic driving operations, and two different persons in the too drastic driving corresponding tables is used in the too drastic driving operation of each time respectively.

5. one kind is used image driving method, it is characterized in that comprising the following steps:

Provide different too drastic driving corresponding tables to different primary colors, so that transmit the reaction time difference of the optical transmission medium of different primary colors coloured light.

6. image driving method as claimed in claim 5 is characterized in that:

Make the reaction time that reaction time of the optical transmission medium that transmits blue coloured light is longer than the optical transmission medium that transmits red coloured light or green coloured light.

7. image driving method as claimed in claim 5, the optical transmission medium that wherein transmits each primary colors coloured light is a liquid crystal.

8. image drive system comprises:

One too drastic drive circuit module, this too drastic drive circuit module is in order to receive an image signal, this too drastic drive circuit module comprises a plurality of too drastic driving table of comparisons circuit, and at least one primary colors signal of this image signal is contained a too drastic driving image signal of at least two too drastic driving signals by at least two described too drastic driving table of comparisons circuit conversion outputs respectively at different sequential; And

One display, this display are electrically coupled to this too drastic drive circuit module, and wherein this display comes show image by receiving this too drastic driving image signal.

9. image drive system comprises:

One too drastic drive circuit module, this too drastic drive circuit module is in order to receive an image signal, this too drastic drive circuit module comprises a plurality of too drastic driving table of comparisons circuit, and the primary colors signal of this image signal is contained a too drastic driving image signal of different too drastic driving signals respectively by a too drastic driving table of comparisons conversion output of the described too drastic driving table of comparisons circuit of difference; And

One display, this display are electrically coupled to this too drastic drive circuit module, and wherein this display comes show image by receiving this too drastic driving image signal.

10. LCD comprises:

One too drastic drive circuit module, this too drastic drive circuit module is in order to receive an image signal, this too drastic drive circuit module comprises a plurality of too drastic driving table of comparisons circuit, and at least one primary colors signal of this image signal is contained a too drastic driving image signal of at least two too drastic driving signals by at least two described too drastic driving table of comparisons circuit conversion outputs respectively at different sequential;

The one source pole driving circuit is electrically coupled to this too drastic drive circuit module, receives this too drastic image and drives signal, in order to a too drastic image data signal to be provided;

One gate driver circuit is in order to provide a controlling signal; And

One liquid crystal panel, this liquid crystal panel contains a plurality of thin film transistor (TFT)s and a plurality of liquid crystal molecule, the grid of described thin film transistor (TFT) is coupled to this gate driver circuit to receive this controlling signal, the source electrode of described thin film transistor (TFT) is coupled to this source electrode drive circuit to receive this too drastic image data signal, made up to drive described thin film transistor (TFT) by this controlling signal and this too drastic image data signal, one of described thin film transistor (TFT) applies voltages to one of corresponding described liquid crystal molecule separately and comes show image.

11. a LCD comprises:

One too drastic drive circuit module, this too drastic drive circuit module is in order to receive an image signal, this too drastic drive circuit module comprises a plurality of too drastic driving table of comparisons circuit, and a plurality of primary colors signals of this image signal are contained a too drastic driving image signal of different too drastic driving signals respectively by a too drastic driving table of comparisons conversion output of the described too drastic driving table of comparisons circuit of difference;

The one source pole driving circuit is electrically coupled to this too drastic drive circuit module, receives this too drastic image and drives signal, in order to a too drastic image data signal to be provided;

One gate driver circuit is in order to provide a controlling signal; And

One liquid crystal panel, this liquid crystal panel contains a plurality of thin film transistor (TFT)s and a plurality of liquid crystal molecule, the grid of described thin film transistor (TFT) is coupled to this gate driver circuit to receive this controlling signal, the source electrode of described thin film transistor (TFT) is coupled to this source electrode drive circuit to receive this too drastic image data signal, made up to drive described thin film transistor (TFT) by this controlling signal and this too drastic image data signal, one of described thin film transistor (TFT) applies voltages to one of corresponding described liquid crystal molecule separately and comes show image.

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