CN101694764A - Plane display device with dynamic regulation mechanism and image display method thereof - Google Patents

Abstract

The invention provides a plane display device with a dynamic adjustment mechanism and an image display method thereof. The four-color conversion unit is used for providing a first group of four-color image signals corresponding to the three-color image input signals according to the pre-conversion comparison table and providing a plurality of corresponding conversion amplification factors. The backlight control unit generates a backlight adjustment signal according to the plurality of conversion amplification factors. The backlight module adjusts the intensity of the backlight output according to the backlight adjusting signal. The four-color conversion unit is further used for providing a second group of four-color image signals corresponding to the three-color image input signals according to the backlight adjusting signals. The pixel array is used for displaying images according to the second group of four-color image signals and matched with the backlight output.

Description

Flat display device with dynamic adjustment mechanism and its image display method

technical field

The invention relates to a flat display device, especially a flat display device with a dynamic adjustment mechanism and an image display method thereof.

Background technique

Flat Panel Display has the advantages of light and thin appearance, power saving, and no radiation, so it is widely used in electronic products such as computer screens, mobile phones, personal digital assistants (PDAs), and flat-screen TVs. Among various flat panel display devices, liquid crystal display devices are widely used due to their lower power consumption. Traditional liquid crystal display devices display colors using three-color display technology based on RGB pixels. However, the brightness of the screen is not ideal. In order to improve the brightness of the screen, a four-color display technology based on RGBW pixels with white pixels has been developed. However, when the liquid crystal display device is changed from the three-color display technology to the four-color display technology, the area of the RGB pixels will be reduced, so that the liquid crystal display device cannot display its proper brightness and chroma when displaying a pure color or a color close to a pure color. In other words, adding white pixels will reduce the brightness and saturation of pure or near-pure colors, making it difficult to maintain high image reproduction.

Contents of the invention

According to an embodiment of the present invention, it discloses a flat-panel display device with a dynamic adjustment mechanism, which is used to maintain high image reproducibility in images displayed based on four-color image signals. The flat display device includes a four-color conversion unit, a dynamic backlight control unit, a backlight module, a source driver, and a pixel array unit. The four-color conversion unit includes a pre-conversion look-up table. The four-color conversion unit is used to provide the first group of four-color image signals corresponding to the three-color image input signals according to the pre-conversion comparison table, and to provide a plurality of corresponding conversion amplification factors, and to convert the three-color image signals according to the backlight adjustment signal The color image input signal is converted into a second group of four-color image signals. The dynamic backlight control unit is electrically connected to the four-color conversion unit, and is used for generating backlight adjustment signals according to multiple conversion amplification factors. The backlight module is electrically connected to the dynamic backlight control unit for providing backlight output, wherein the intensity of the backlight output is adjusted according to the backlight adjustment signal. The source driver is electrically connected to the four-color conversion unit and used for providing a plurality of data signals according to the second group of four-color image signals. The pixel array unit is electrically connected to the source driver, and is used for displaying images according to a plurality of data signals in cooperation with the backlight output.

According to an embodiment of the present invention, it further discloses a flat panel display device with a dynamic adjustment mechanism, which is used to maintain a high image reproducibility for images displayed based on four-color image signals. The flat display device includes a four-color conversion unit, a dynamic backlight control unit, a compensation unit, a backlight module, a source driver, and a pixel array unit. The four-color conversion unit includes a pre-conversion look-up table. The four-color conversion unit is used to provide the first group of four-color image signals corresponding to the three-color image input signals according to the pre-conversion look-up table, and provide a plurality of corresponding conversion amplification factors. The dynamic backlight control unit is electrically connected to the four-color conversion unit, and is used for generating backlight adjustment signals according to multiple conversion amplification factors. The compensation unit is electrically connected to the four-color conversion unit and the dynamic backlight control unit, and is used for compensating the first group of four-color image signals into the second group of four-color image signals according to the backlight adjustment signal. The backlight module is electrically connected to the dynamic backlight control unit for providing backlight output, wherein the intensity of the backlight output is adjusted according to the backlight adjustment signal. The source driver is electrically connected to the compensation unit and used for providing a plurality of data signals according to the second group of four-color image signals. The pixel array unit is electrically connected to the source driver and the gate driver, and is used for displaying images according to a plurality of data signals in cooperation with the backlight output.

The present invention also discloses an image display method for a flat panel display device, which is used to maintain high image reproducibility in images displayed based on four-color image signals. This image display method includes: receiving three-color image input signals; providing the first group of four-color image signals corresponding to the three-color image input signals according to the pre-conversion comparison table, and providing corresponding multiple conversion amplification factors; according to the multiple a conversion amplification factor to provide a backlight adjustment signal; adjust the intensity of the backlight output according to the backlight adjustment signal; generate a second group of four-color image signals according to the backlight adjustment signal; and display images according to the second group of four-color image signals and the backlight output .

Description of drawings

FIG. 1 is a schematic structural diagram of a flat panel display device 100 according to a first embodiment of the present invention.

FIG. 2 is a schematic structural diagram of a flat panel display device 200 according to a second embodiment of the present invention.

FIG. 3 is a schematic structural diagram of a flat panel display device 300 according to a third embodiment of the present invention.

FIG. 4 is a flowchart of a preferred embodiment of an image display method for a flat panel display device according to the present invention.

Figure number:

100, 200, 300 flat panel display devices

110, 210, 310 four-color conversion unit

111, 211, 311 pre-conversion comparison table

120, 320 Dynamic backlight control unit

121, 321 Amplification factor analysis unit

123, 323 backlight adjustment comparison table

130, 330 backlight drive unit

135, 335 Duty cycle adjustment unit

140, 340 backlight module

170, 370 Source Drivers

180, 380 gate driver

190, 390 pixel array unit

195, 395 pixel units

215_1～215_N input conversion comparison table

350 Compensation unit

355_1～355_N Compensation comparison table

900 Process

Clc LCD Capacitor

Cst Storage Capacitor

Qd Data switch

Ri, Gi, Bi Image input signal

R', G', B', W', R1, G1, B1, W1, image signal R2, G2, B2, W2

S910～S970 Steps

Sadj Backlight adjustment signal

Sana Analysis Value

Scorr Conversion Correction Signal

SD1～SDm Data signal

SG1～SGn Gate signal

Spwm Pulse Width Modulation Signal

Ssca Conversion Amplification Factor

Detailed ways

In the following, the flat panel display device with dynamic adjustment mechanism and its image display method according to the present invention will be described in detail with specific embodiments in conjunction with the accompanying drawings. However, the provided embodiments are not intended to limit the scope of the present invention, and the method flow The numbering of the steps is not used to limit the order of their execution, and any method with the same effect produced by recombining the execution flow of the method steps is within the scope of the present invention.

FIG. 1 is a schematic structural diagram of a flat panel display device 100 according to a first embodiment of the present invention. As shown in FIG. 1 , the flat panel display device 100 includes a four-color conversion unit 110 , a dynamic backlight control unit 120 , a backlight driving unit 130 , a backlight module 140 , a source driver 170 , a gate driver 180 , and a pixel array unit 190 . The pixel array unit 190 includes a plurality of pixel units 195, and each pixel unit 195 has a data switch Qd, a liquid crystal capacitor Clc, and a storage capacitor Cst. The source driver 170 is used to provide a plurality of data signals SD1-SDm, the gate driver 180 is used to provide a plurality of gate signals SG1-SGn to control related writing operations of a plurality of data signals SD1-SDm, and the pixel array unit 190 That is, images are displayed in accordance with the backlight output provided by the backlight module 140 according to a plurality of data signals SD1˜SDm.

The four-color conversion unit 110 is electrically connected to the dynamic backlight control unit 120 and the source driver 170 for converting the three-color image input signals Ri, Gi, Bi into four-color image signals with white image signals. The four-color conversion unit 110 includes a pre-conversion comparison table 111, and the pre-conversion comparison table 111 is used to provide the first group of four-color image signals corresponding to the three-color image input signals Ri, Gi, Bi, that is, the pre-conversion comparison table Table 111 provides a comparative relationship between the three-color image input signals Ri, Gi, Bi and the first group of four-color image signals. The four-color conversion unit 110 further outputs a plurality of conversion amplification factors Ssca corresponding to the three-color image input signals Ri, Gi, Bi into the first group of four-color image signals to the dynamic backlight control unit 120 . In one embodiment, each group of three-color image input signals Ri, Gi, Bi is determined according to whether it is a pure color or close to a pure color and/or matches its brightness to determine the corresponding conversion amplification factor Ssca, for example, if a group of three-color images The input signals Ri, Gi, and Bi are used to display the three primary colors of blue, that is, the values of the signals Ri and Gi are zero, and the corresponding conversion amplification factor Ssca can be set to zero.

The dynamic backlight control unit 120 includes an amplification factor analysis unit 121 and a backlight adjustment table 123 . The magnification factor analysis unit 121 is used to perform analysis processing on the multiple conversion magnification factors Ssca corresponding to the multiple groups of three-color image input signals Ri, Gi, Bi of each frame to generate an analysis value Sana. In one embodiment, the magnification factor analysis unit 121 is used to perform statistical processing on a plurality of conversion magnification factors Ssca corresponding to multiple sets of three-color image input signals Ri, Gi, Bi of each frame, so as to provide corresponding For each count value of the conversion amplification factor Ssca, a plurality of count values are sequentially accumulated into an accumulation value according to the increasing order of the conversion amplification factor Ssca, until the accumulation value is about a preset value, and the corresponding The maximum conversion amplification factor Ssca of the accumulated count value, if the maximum conversion amplification factor Ssca is smaller, it means that the backlight output of the backlight module 140 needs to be adjusted brighter. Please note that the preset value can be a number of a preset percentage of the total number of picture pixels, for example, the preset value can be a number of 20% of the total number of picture pixels.

The backlight adjustment comparison table 123 is used to provide the backlight adjustment signal Sadj corresponding to the analysis value Sana, that is, to provide a comparison relationship between the analysis value Sana and the backlight adjustment signal Sadj. In other words, the dynamic backlight control unit 120 is used to provide a corresponding backlight adjustment signal Sadj according to the analysis results of the amplification factor analysis unit 121 on the multiple conversion amplification factors Ssca. The dynamic backlight control unit 120 also generates a conversion correction signal Scorr according to the backlight adjustment signal Sadj and feeds it to the four-color conversion unit 110, and the four-color conversion unit 110 can generate a correction conversion comparison table according to the conversion correction signal Scorr and the pre-conversion comparison table 111 , so as to provide a second group of four-color image signals R', G', B', W' corresponding to the three-color image input signals Ri, Gi, Bi to the source driver 170, and the source driver 170 further according to the second group The four-color image signals R', G', B', W' are used to generate a plurality of data signals SD1˜SDm. The backlight driving unit 130 is electrically connected between the dynamic backlight control unit 120 and the backlight module 140 for generating a pulse width modulation signal Spwm according to the backlight adjustment signal Sadj to drive the backlight module 140 to generate a required backlight output. The backlight driving unit 130 includes a duty cycle adjustment unit 135 , and the duty cycle of the pulse width modulation signal Spwm is adjusted by the duty cycle adjustment unit 135 according to the backlight adjustment signal Sadj.

In one embodiment, if among the multiple image signals of the image to be displayed, the larger the number of image signals belonging to pure color or close to pure color, that is, the larger the number of multiple conversion amplification factors Ssca is smaller than the preset critical value, then by The backlight adjustment signal Sadj provided by the backlight adjustment comparison table 123 is also larger, so as to increase the backlight output of the backlight module 140, and according to the backlight adjustment signal Sadj to adjust the image signal that is not a pure color or not close to a pure color, and/or adjust the image signal belonging to An image signal of pure color or near pure color. In another embodiment, the backlight adjustment signal Sadj is approximately proportional to the amount of the image signal belonging to the pure color or close to the pure color, and the adjustment amount of the backlight output is approximately proportional to the backlight adjustment signal Sadj. In addition, the conversion and correction signal Scorr is also approximately proportional to the backlight adjustment signal Sadj, so the signal reduction amount of the image signal that is not a pure color or not close to the pure color is approximately proportional to the increase amount of the backlight output.

From the above, it can be seen that the flat panel display device 100 adjusts the backlight output according to the number of image signals belonging to pure color or close to pure color among multiple image input signals, and adjusts the output of the backlight according to the amount of increase of the backlight output. The signal value of the image signal is used to make the image displayed based on the four-color image signal still maintain a high image reproduction.

FIG. 2 is a schematic structural diagram of a flat panel display device 200 according to a second embodiment of the present invention. As shown in FIG. 2 , the structure of the flat panel display device 200 is similar to that of the flat panel display device 100 shown in FIG. 1 , the main difference being that the four-color conversion unit 110 is replaced by the four-color conversion unit 210 . The four-color conversion unit 210 includes a pre-conversion comparison table 211 and a plurality of input conversion comparison tables 215_1-215_N, wherein the function of the pre-conversion comparison table 211 is the same as that of the pre-conversion comparison table 111 shown in FIG. . After the four-color conversion unit 210 receives the conversion correction signal Scorr fed from the dynamic backlight control unit 120, the four-color conversion unit 210 will select the corresponding input from multiple input conversion comparison tables 215_1-215_N according to the conversion correction signal Scorr. The look-up table is converted to provide a second set of four-color image signals R', G', B', W' corresponding to the three-color image input signals Ri, Gi, Bi. Compared with the four-color conversion unit 110, the four-color conversion unit 210 does not need to perform correlation calculation processing according to the conversion correction signal Scorr and the pre-conversion comparison table 111 to generate the aforementioned modified conversion comparison table, so the signal processing speed can be improved. .

FIG. 3 is a schematic structural diagram of a flat panel display device 300 according to a third embodiment of the present invention. As shown in Figure 3, the flat display device 300 includes a four-color conversion unit 310, a dynamic backlight control unit 320, a backlight drive unit 330, a backlight module 340, a compensation unit 350, a source driver 370, a gate driver 380, and a pixel array unit 390. The pixel array unit 390 includes a plurality of pixel units 395, and each pixel unit 395 has a data switch Qd, a liquid crystal capacitor Clc, and a storage capacitor Cst. The source driver 370 is used to provide a plurality of data signals SD1-SDm, the gate driver 380 is used to provide a plurality of gate signals SG1-SGn to control related writing operations of a plurality of data signals SD1-SDm, and the pixel array unit 390 That is, images are displayed by cooperating with the backlight output provided by the backlight module 340 according to the plurality of data signals SD1˜SDm.

The four-color conversion unit 310 is electrically connected to the dynamic backlight control unit 320 and the compensation unit 350, and is used to convert the three-color image input signals Ri, Gi, and Bi into the first group of four-color image signals R1, G1, having a white image signal W1. B1, W1. The four-color conversion unit 310 includes a pre-conversion table 311, and the pre-conversion table 311 is used to provide the first group of four-color image signals R1, G1, B1, W1 corresponding to the three-color image input signals Ri, Gi, and Bi. , that is, the pre-conversion comparison table 311 provides the comparison relationship between the three-color image input signals Ri, Gi, Bi and the first group of four-color image signals R1, G1, B1, W1. The first group of four-color image signals R1, G1, B1, W1 are sent to the compensation unit 350, and the four-color conversion unit 310 converts the corresponding three-color image input signals Ri, Gi, Bi into the first group of four-color images A plurality of conversion amplification factors Ssca of the signals R1 , G1 , B1 , W1 are output to the dynamic backlight control unit 320 .

The dynamic backlight control unit 320 includes an amplification factor analysis unit 321 and a backlight adjustment table 323 . The amplification factor analysis unit 321 is used for performing analysis processing of a plurality of converted amplification factors Ssca to generate an analysis value Sana. The backlight adjustment comparison table 323 is used to provide the backlight adjustment signal Sadj corresponding to the analysis value Sana, that is, to provide a comparison relationship between the analysis value Sana and the backlight adjustment signal Sadj. The dynamic backlight control unit 320 also generates a conversion correction signal Scorr according to the backlight adjustment signal Sadj and feeds it to the compensation unit 350 . The compensation unit 350 includes a plurality of compensation comparison tables 355_1˜355_N. After the compensation unit 350 receives the conversion correction signal Scorr fed by the dynamic backlight control unit 320, the compensation unit 350 will select the corresponding compensation comparison table from a plurality of compensation comparison tables 355_1-355_N according to the conversion correction signal Scorr, according to Compensate the first group of four-color image signals R1, G1, B1, W1 to the second group of four-color image signals R2, G2, B2, W2 and output them to the source driver 370, and the source driver 370 further according to the second group of four-color image signals Signals R2, G2, B2, W2 to generate a plurality of data signals SD1˜SDm. The backlight driving unit 330 is electrically connected between the dynamic backlight control unit 320 and the backlight module 340 for generating a pulse width modulation signal Spwm according to the backlight adjustment signal Sadj to drive the backlight module 340 to generate a required backlight output. The backlight driving unit 330 includes a duty cycle adjustment unit 335 , and the duty cycle of the pulse width modulation signal Spwm is adjusted by the duty cycle adjustment unit 335 according to the backlight adjustment signal Sadj.

In one embodiment, if among the multiple image signals of the image to be displayed, the larger the number of image signals belonging to pure color or close to pure color, that is, the larger the number of multiple conversion amplification factors Ssca is smaller than the preset critical value, then by The backlight adjustment signal Sadj provided by the backlight adjustment comparison table 323 is also larger, so as to increase the backlight output of the backlight module 340, and adjust the signal Sadj according to the backlight to compensate for the image signal that is not a pure color or not close to a pure color, and/or compensates for an image signal belonging to An image signal of pure color or near pure color. In another embodiment, the backlight adjustment signal Sadj is approximately proportional to the amount of the image signal belonging to the pure color or close to the pure color, and the adjustment amount of the backlight output is approximately proportional to the backlight adjustment signal Sadj. In addition, the conversion correction signal Scorr is approximately proportional to the backlight adjustment signal Sadj, so the signal compensation amount of the image signal that is not a pure color or not close to a pure color is approximately proportional to the adjustment amount of the backlight output.

It can be known from the above that the flat panel display device 300 adjusts the backlight output according to the number of image signals belonging to pure color or close to pure color among multiple image input signals, and compensates for images that are not pure color or not close to pure color according to the amount of increase of the backlight output. The signal value of the signal is used to make the image displayed based on the four-color image signal still maintain a high image reproduction.

FIG. 4 is a flowchart of a preferred embodiment of an image display method for a flat panel display device according to the present invention. The process 900 shown in FIG. 4 is an image display method based on the flat display device 100 of FIG. 1 , the flat display device 200 of FIG. 2 , or the flat display device 300 of FIG. 3 . The flow 900 of the image display method includes the following steps:

Step S910: receiving a three-color image input signal;

Step S920: Provide the first group of four-color image signals corresponding to the three-color image input signal according to the pre-conversion comparison table, and provide a plurality of corresponding conversion amplification factors;

Step S930: providing a backlight adjustment signal according to a plurality of conversion amplification factors;

Step S940: adjust the intensity of the backlight output according to the backlight adjustment signal;

Step S950: adjusting the signal according to the backlight to generate a conversion correction signal;

Step S960: modifying the signal according to the conversion to generate a second group of four-color image signals; and

Step S970: Displaying images according to the second group of four-color image signals and outputting the backlight.

In the process 900 of the image display method, each set of four-color image signals may include a white image signal. In the embodiment of the flat display device 100 based on FIG. 1 , generating the second group of four-color image signals according to the converted correction signal in step S960 is to generate the corrected conversion comparison according to the converted correction signal and the pre-conversion table. table, and provide a second group of four-color image signals corresponding to the three-color image input signals according to the modified conversion comparison table. In the embodiment of the flat display device 200 based on FIG. 2 , generating the second group of four-color image signals according to the conversion correction signal in step S960 is to select the corresponding input from a plurality of input conversion comparison tables according to the conversion correction signal. The conversion lookup table is used to provide a second group of four-color image signals corresponding to the three-color image input signals according to the selected corresponding input conversion lookup table. In the embodiment of the flat-panel display device 300 based on FIG. 3 , generating the second group of four-color image signals according to the conversion correction signal in step S960 is to select the corresponding compensation comparison from a plurality of compensation comparison tables according to the conversion correction signal. table, and compensate the first group of four-color image signals into the second group of four-color image signals according to the selected corresponding compensation comparison table.

The step S930 of providing the backlight adjustment signal according to the multiple conversion amplification factors is to analyze the multiple conversion amplification factors to generate corresponding analysis values, and provide the backlight adjustment signal according to the analysis values. In one embodiment, the analysis value is the number of conversion amplification factors smaller than a predetermined threshold value among the plurality of conversion amplification factors, that is, the analysis value may be the number of image signals belonging to pure color or close to pure color. The adjusting the intensity of the backlight output according to the backlight adjustment signal in step S940 includes adjusting the duty cycle of the PWM signal according to the backlight adjustment signal, and driving the backlight output according to the PWM signal. In one embodiment, the increase of the duty cycle is approximately proportional to the backlight adjustment signal, that is, the increase of the backlight output is approximately proportional to the amount of the image signal belonging to the pure color or close to the pure color.

To sum up, the flat panel display device of the present invention adjusts the intensity of the backlight output according to the number of image signals belonging to the pure color or close to the pure color of multiple image input signals, and adjusts the intensity of the non-solid color or image signal according to the amount of increase of the backlight output. The signal value of an image signal that is not close to a pure color is used to maintain a high image reproducibility in an image displayed based on a four-color image signal.

Although the present invention has been disclosed above with the embodiments, it is not intended to limit the present invention. Any person skilled in the technical field of the present invention can make various modifications and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention should be defined by the scope of the appended claims.

Claims (21)

1. the flat display apparatus of a tool dynamic adjustment mechanism is characterized in that, described flat display apparatus comprises:

One or four look converting units, comprise a preposition conversion table of comparisons, described four look converting units are to be used for providing one first group of four-color image signal corresponding to the image three-colo(u)r input signal according to the described preposition conversion table of comparisons, and corresponding a plurality of conversion amplification factor is provided, and be used for described image three-colo(u)r input signal being converted to one second group of four-color image signal according to a backlight adjustment signals;

One dynamic backlight control module is electrically connected on described four look converting units, is used for according to described a plurality of conversion amplification factors to produce described backlight adjustment signals;

One backlight module is electrically connected on described dynamic backlight control module, is used to provide an output backlight, and the intensity of wherein said output backlight is to adjust according to described backlight adjustment signals;

The one source pole driver is electrically connected on described four look converting units, is used for according to described second group of four-color image signal so that a plurality of data-signals to be provided; And

One pixel-array unit is electrically connected on described source electrode driver, is used for cooperating described output backlight to show an image according to described a plurality of data-signals.

2. flat display apparatus as claimed in claim 1 is characterized in that other comprises:

One backlight driving unit is electrically connected between described dynamic backlight control module and the described backlight module, is used for producing a pulse wave width modulation signal to drive described backlight module according to described backlight adjustment signals.

3. flat display apparatus as claimed in claim 2 is characterized in that, described backlight driving unit comprises:

One work period adjustment unit is used for according to described backlight adjustment signals to adjust the work period of described pulse wave width modulation signal.

4. flat display apparatus as claimed in claim 1 is characterized in that, described dynamic backlight control module comprises:

The one adjustment table of comparisons backlight is used to provide the described backlight adjustment signals corresponding to described a plurality of conversion amplification factors.

5. flat display apparatus as claimed in claim 1 is characterized in that, described dynamic backlight control module comprises:

One amplification factor analytic unit is used for analyzing described a plurality of conversion amplification factor to produce an assay value; And

The one adjustment table of comparisons backlight is used to provide the described backlight adjustment signals corresponding to described assay value.

6. flat display apparatus as claimed in claim 1 is characterized in that, described dynamic backlight control module is used for providing a conversion corrected signal according to described backlight adjustment signals in addition, and described four look converting units comprise in addition:

A plurality of input conversion tables of comparisons, described four look converting units are selected a corresponding input conversion table of comparisons according to described conversion corrected signal from the described a plurality of inputs conversion tables of comparisons, and provide described second group of four-color image signal corresponding to described image three-colo(u)r input signal according to the described corresponding input conversion table of comparisons.

7. flat display apparatus as claimed in claim 1, it is characterized in that, described dynamic backlight control module is used for providing a conversion corrected signal according to described backlight adjustment signals in addition, described four look converting units are used for revising the conversion table of comparisons according to the described preposition conversion table of comparisons and described conversion corrected signal to produce one in addition, and provide described second group of four-color image signal corresponding to described image three-colo(u)r input signal according to the described correction conversion table of comparisons.

8. flat display apparatus as claimed in claim 1 is characterized in that other comprises:

One gate drivers is electrically connected on described pixel-array unit, is used to provide a plurality of signals to control the running that writes of described a plurality of data-signals.

9. the flat display apparatus of a tool dynamic adjustment mechanism is characterized in that, described flat display apparatus comprises:

One or four look converting units, comprise a preposition conversion table of comparisons, described four look converting units are to be used for providing one first group of four-color image signal corresponding to the image three-colo(u)r input signal according to the described preposition conversion table of comparisons, and corresponding a plurality of conversion amplification factor is provided;

One dynamic backlight control module is electrically connected on described four look converting units, is used for according to described a plurality of conversion amplification factors to produce a backlight adjustment signals;

One compensating unit is electrically connected on described four look converting units and described dynamic backlight control module, and being used for according to described backlight adjustment signals is one second group of four-color image signal with described first group of four-color image signal compensation;

One backlight module is electrically connected on described dynamic backlight control module, is used to provide an output backlight, and the intensity of wherein said output backlight is to adjust according to described backlight adjustment signals;

The one source pole driver is electrically connected on described compensating unit, is used for according to described second group of four-color image signal so that a plurality of data-signals to be provided; And

One pixel-array unit is electrically connected on described source electrode driver and described gate drivers, is used for cooperating described output backlight to show an image according to described a plurality of data-signals.

10. flat display apparatus as claimed in claim 9 is characterized in that, described dynamic backlight control module is used for providing a conversion corrected signal according to described backlight adjustment signals in addition, and described compensating unit comprises:

A plurality of compensation tables of comparisons, described compensating unit is selected corresponding compensation tables of comparisons according to described conversion corrected signal from the described a plurality of compensation tables of comparisons, and is described second group of four-color image signal according to the described corresponding compensation table of comparisons with described first group of four-color image signal compensation.

11. flat display apparatus as claimed in claim 9 is characterized in that, other comprises:

One backlight driving unit is electrically connected between described dynamic backlight control module and the described backlight module, is used for producing a pulse wave width modulation signal to drive described backlight module according to described backlight adjustment signals.

12. flat display apparatus as claimed in claim 11 is characterized in that, described backlight driving unit comprises:

One work period adjustment unit is used for according to described backlight adjustment signals to adjust the work period of described pulse wave width modulation signal.

13. flat display apparatus as claimed in claim 9 is characterized in that, described dynamic backlight control module comprises:

The one adjustment table of comparisons backlight is used to provide the described backlight adjustment signals corresponding to described a plurality of conversion amplification factors.

14. flat display apparatus as claimed in claim 9 is characterized in that, described dynamic backlight control module comprises:

One amplification factor analytic unit is used for analyzing described a plurality of conversion amplification factor to produce an assay value; And

The one adjustment table of comparisons backlight is used to provide the described backlight adjustment signals corresponding to described assay value.

15. a method for displaying image that is used for flat display apparatus is characterized in that, described method for displaying image comprises:

Receive one group of image three-colo(u)r input signal;

Provide one first group of four-color image signal according to a preposition conversion table of comparisons, and corresponding a plurality of conversion amplification factor is provided corresponding to this group image three-colo(u)r input signal;

Provide a backlight adjustment signals according to described a plurality of conversion amplification factors;

Adjust the intensity of an output backlight according to described backlight adjustment signals;

Produce one second group of four-color image signal according to described backlight adjustment signals; And

Show an image according to described second group of four-color image signal and described output backlight.

16. method for displaying image as claimed in claim 15 is characterized in that, produces the step that described second group of four-color image interrogated according to described backlight adjustment signals, comprises:

Produce a conversion corrected signal according to described backlight adjustment signals;

Produce a correction conversion table of comparisons according to the described conversion corrected signal and the described preposition conversion table of comparisons; And

Provide described second group of four-color image signal of changing corresponding to this group image three-colo(u)r input signal according to the described correction conversion table of comparisons.

17. method for displaying image as claimed in claim 15 is characterized in that, produces the step that described second group of four-color image interrogated according to described backlight adjustment signals, comprises:

Produce a conversion corrected signal according to described backlight adjustment signals;

From a plurality of input conversion tables of comparisons, select a corresponding input conversion table of comparisons according to described conversion corrected signal; And

Provide described second group of four-color image signal of changing corresponding to this group image three-colo(u)r input signal according to the described corresponding input conversion table of comparisons.

18. method for displaying image as claimed in claim 15 is characterized in that, produces the step that described second group of four-color image interrogated according to described backlight adjustment signals, comprises:

Produce a conversion corrected signal according to described backlight adjustment signals;

From a plurality of compensation tables of comparisons, select a corresponding compensation table of comparisons according to described conversion corrected signal; And

Is described second group of four-color image signal according to the described corresponding compensation table of comparisons with described first group of four-color image signal compensation.

19. method for displaying image as claimed in claim 15 is characterized in that, adjusts the step of the intensity of described output backlight according to described backlight adjustment signals, comprises:

Adjust the work period of a pulse wave width modulation signal according to described backlight adjustment signals; And

Drive described output backlight according to described pulse wave width modulation signal.

20. method for displaying image as claimed in claim 15 is characterized in that, provides the step of described backlight adjustment signals according to described a plurality of conversion amplification factors, comprises:

Analyze described a plurality of conversion amplification factor to produce an assay value; And

According to described assay value so that described backlight adjustment signals to be provided.

21. method for displaying image as claimed in claim 20 is characterized in that, described assay value is in described a plurality of conversion amplification factors, less than the quantity of the conversion amplification factor of a critical value.

Images