TWI400692B - Lcd and video data processing device and method thereof - Google Patents

Description

Liquid crystal display and image data processing device and method thereof

The present invention relates to a flat display technology, and more particularly to a liquid crystal display and an image data processing apparatus and method thereof.

With the evolution of optoelectronics and semiconductor technology, the development of flat panel displays has been promoted. In many flat panel displays, liquid crystal displays have superior characteristics such as high space utilization efficiency, low power consumption, no radiation and low electromagnetic interference. Become the mainstream of the market. The liquid crystal display generally includes a liquid crystal display panel (LCD panel) and a backlight module. Since the liquid crystal display panel itself does not have self-luminous characteristics, the backlight module must be disposed under the liquid crystal display panel to provide liquid crystal. The surface light source required for the display panel is such that the liquid crystal display can display images for viewing by the user.

Nowadays, the backlight module can be divided into two types: a bottom lighting type and an edge lighting type. The direct type backlight module is usually applied to a larger size liquid crystal display, and the side light type backlight is used. The module is widely used in medium and small size liquid crystal displays because of its light weight, thin shape, narrow frame and low power consumption. In general, among some medium and small-sized liquid crystal displays that are relatively inexpensive to manufacture, a single-sided optical backlight module is used to supply the surface light source required for the liquid crystal display panel.

However, since the light source of the single-sided optical backlight module (such as a light-emitting diode, CCFL, etc.) is generally placed in the single-sided optical backlight module One side (for example, the lower side), so it is conceivable that the intensity of the surface light source supplied to the liquid crystal display panel by the single-sided optical backlight module is reduced from the lower side to the upper side thereof, so that the single-sided optical backlight The surface light source supplied to the liquid crystal display panel by the module may be uneven, which may result in deterioration of the image quality of the liquid crystal display.

Therefore, it has been proposed to directly print certain specific reflection patterns (such as small dots, concentric circles, etc.) on the light-guide plate of the single-sided optical backlight module, and according to the light source. The distance between these reflection patterns determines the printing density and area of the reflective patterns, so that the shortcomings of the old single-sided optical backlight modules can be effectively solved. Among them, the density of the reflective pattern closer to the light source will be lower and the area is smaller; and the density of the reflective pattern farther away from the light source will be higher and the area is larger.

Although the direct printing of the reflective pattern on the light guide plate of the single-sided optical backlight module can effectively solve the shortcomings of the old single-sided optical backlight module, this method also allows the single-sided optical backlight module. The overall design cost increases. In addition, since the light guide plate printed with the reflective pattern cannot be changed after the completion of the production, when the one-side optical backlight module is integrally assembled, the surface light source supplied thereto is not uniform, and then it is no longer possible. Make any adjustments, and this solution will not only cause the design applicability to be low, but also suppress the production yield of the backlight module.

In view of the above, an object of the present invention is to provide an image data processing apparatus and method for compensating the image data of an image frame such that the brightness of the image displayed by the liquid crystal display applied thereto is achieved. Homogenize.

Based on the above and the objects to be achieved, the present invention provides an image data processing apparatus including a first conversion unit, a partition compensation unit, a reproduction unit, and a second conversion unit. The first conversion unit is configured to receive and convert the image data of an image frame displayed on the liquid crystal display panel, so that the grayscale-transmission ratio correspondence relationship of the image data of the image frame is linear. The partition compensation unit is coupled to the first conversion unit for dividing the image frame into multi-region sub-images according to the brightness distribution state of the surface light source actually supplied to the liquid crystal display panel by the backlight module, and then The image data of a zone sub-image is multiplied by a corresponding compensation value.

The reproducing unit is coupled to the partition compensating unit for processing the image data of each sub-image frame after the compensation value has been multiplied, and reproduces the image data having the decimal point value. The second conversion unit is coupled to the reproduction unit for receiving and converting the image data of each sub-image frame processed by the reproduction unit, so that the grayscale-wearing of the image data of each sub-image image The transmittance correspondence is a gamma relationship.

In an embodiment of the invention, the image data processing device further includes a lookup table coupled to the partition compensation unit for providing the compensation value.

In an embodiment of the invention, the lookup table separately records a plurality of ratios between the brightness of each sub-image image and the brightness of the sub-image image having the lowest brightness in the multi-region sub-image frame. And these ratios are respectively the compensation values multiplied by the image data of each sub-image image.

In an embodiment of the present invention, the reproducing unit reproduces the number of decimal point values of the image data having the decimal point value, and the number of bits having the lowest brightness is obtained. The brightness of the image frame is determined by the ratio of the brightness of the sub-image picture with the highest brightness.

In an embodiment of the present invention, the reproducing unit accumulates the decimal point value of each M image data that has been multiplied by the compensation value, so that when the carry occurs, the Mth is multiplied by the compensation. The integer value of the image data after the value is incremented by one, and vice versa, the decimal point value of the image data that has been multiplied by the compensation value is rounded off, where M is a positive integer.

In an embodiment of the present invention, during the 2Nth screen of the liquid crystal display panel, the reproducing unit does not process the image data of the first pixel of all the even-numbered pixels of the liquid crystal display panel, and the liquid crystal display panel During the (2N+1)th picture period, the reproducing unit does not process the image data of the first pixel of all odd-numbered pixels of the liquid crystal display panel. Where N is a positive integer.

From another point of view, the present invention provides a method for processing image data, which includes the following steps: first, converting image data of an image displayed on a liquid crystal display panel to make grayscale image data of the image image - The correspondence of penetration rates is a linear relationship. Then, according to the brightness distribution state of the surface light source actually supplied to the liquid crystal display panel by the backlight module, the image frame is first divided into multi-region sub-image images, and then the image data of each sub-image image is multiplied by a corresponding one. Compensation value.

Then, the image data of each sub-image frame that has been multiplied by the compensation value is processed, and the image data having the decimal point value is reproduced. Finally, the image data of each sub-image image after processing is converted, so that the gray-penetration rate of the image data of each sub-image image is correspondingly closed. It is a gamma relationship.

In an embodiment of the invention, the compensation value corresponding to the image data of each sub-image image is obtained by searching a lookup table.

In an embodiment of the invention, the lookup table separately records a plurality of ratios between the brightness of each sub-image image and the brightness of the sub-image image having the lowest brightness in the multi-region sub-image frame. And these ratios are respectively the compensation values multiplied by the image data of each sub-image image.

In an embodiment of the invention, the number of decimal point values of the image data having the decimal point value is reproduced by the ratio of the brightness of the sub-image picture having the lowest brightness to the brightness of the sub-image picture having the highest brightness. Determined.

In an embodiment of the invention, the step of reproducing the image data having the decimal point value comprises accumulating the decimal point value of each of the M image data that has been multiplied by the compensation value, thereby causing the The integer value of the M image data that has been multiplied by the compensation value is incremented by one, and vice versa, the decimal point value of the M image data that has been multiplied by the compensation value is discarded, where M is a positive integer.

In an embodiment of the present invention, during the 2Nth screen of the liquid crystal display panel, the image data of the first pixel of all the even columns of the liquid crystal display panel is not processed, but is in the liquid crystal display panel ( During 2N+1) screens, the image data of the first pixel of all odd-numbered pixels of the liquid crystal display panel is not processed. Where N is a positive integer.

From another point of view, the present invention provides a liquid crystal display, The invention comprises a liquid crystal display panel, a backlight module, and the image data processing device proposed by the invention. The liquid crystal display panel is used to display an image frame. The backlight module is used to provide a surface light source required for the liquid crystal display panel. The image data processing device compensates the image data of the image frame according to the brightness distribution state of the backlight module actually supplied to the surface light source of the liquid crystal display panel, so that the brightness of the image displayed by the liquid crystal display panel is uniformized.

The image data processing device and method proposed by the present invention mainly replace the conventional method of printing a reflective pattern on a light guide plate of a backlight module by compensating the image data of the image frame. Such a solution is not The design cost of the backlight module is increased, and the brightness of the image displayed by the liquid crystal display to be applied can also be uniformized. In addition, even if the backlight module has been assembled, the image data processing apparatus and method of the present invention can compensate the image data of the image frame. Therefore, the design of the image data processing apparatus and method of the present invention is quite applicable.

The above and other objects, features, and advantages of the present invention will become more apparent and understood.

The technical effect of the invention is to achieve uniformity of the brightness of the image displayed on the liquid crystal display. The following content will be described in detail for the technical features of the present invention, and will be provided to those skilled in the related art of the present invention.

FIG. 1 illustrates a system of a liquid crystal display 100 according to an embodiment of the invention. Block diagram. Referring to FIG. 1 , the liquid crystal display 100 includes a liquid crystal display panel 101 , a backlight module 103 , an image data processing device 105 , a timing controller 107 , a gate driver 109 , and a source driver 111 . The liquid crystal display panel 101 is used to display a video frame. The backlight module 103 is used to provide a surface light source required for the liquid crystal display panel 101. The image data processing device 105 compensates the image data VD of the image frame according to the brightness distribution state of the surface light source that the backlight module 103 actually supplies to the liquid crystal display panel 101, thereby causing the liquid crystal display panel 101 to display The brightness of the image is even.

The gate driver 109 is controlled by the timing controller 107, and each column of pixels (not shown) in the liquid crystal display panel 101 is turned on one by one. The source driver 111 is also controlled by the timing controller 107 to provide a data voltage (or a pre-pixel corresponding to the image data VD' of the image frame compensated by the image data processing device 105 received by the timing controller 107. The voltage is given to the column pixels in the liquid crystal display panel 101 that are turned on by the gate driver 109. Thus, when the source driver 111 completes providing the corresponding data voltage to the last column of pixels in the liquid crystal display panel 101, the surface light source supplied by the backlight module 103 causes the liquid crystal display panel 101 to display the image frame.

In order to more clearly illustrate the spirit of the present invention, the backlight module 103 is assumed to be a single edge lighting type, but is not limited thereto. It can be seen from the disclosure of the prior art that when the light source of the backlight module 103 (for example, a light emitting diode, a CCFL, etc.) is placed on a single side of the entire backlight module 103 (for example, the lower side, but The intensity of the surface light source supplied to the liquid crystal display panel 101 may be reduced from the lower side to the upper side thereof, so that the single-sided optical backlight module 103 is supplied to the liquid crystal display panel 101. The surface light source may be uneven (that is, it may be decremented from the lower side of the liquid crystal display panel 101 to the upper side thereof), thereby causing deterioration of the image quality of the image displayed by the liquid crystal display 100.

However, in this embodiment, the brightness of the image displayed by the liquid crystal display 100 can be uniformized under the condition that the reflective pattern is not printed on the light guide plate of the backlight module 103, and the most important technology is This is the function of the image data processing device 105 of the present embodiment. Therefore, the following content will be explained in conjunction with the internal block diagram of the image data processing apparatus 105 for those skilled in the relevant art to which the present invention pertains.

FIG. 2 is an internal block diagram of an image data processing apparatus 105 according to an embodiment of the present invention. Referring to FIG. 1 and FIG. 2 together, the image data processing apparatus 105 includes a first conversion unit 201, a partition compensation unit 203, a reproduction unit 205, a second conversion unit 207, and a lookup table 209. The first conversion unit 201 is configured to receive and convert the image data VD of the image frame displayed on the liquid crystal display panel 101, so that the gray-penetration relationship of the image data VD of the image frame is linear, and It should be understood by those skilled in the art that the function of the first converting unit 201 is to perform a linear de-gamma operation on the image data VD of the image frame.

The partition compensation unit 203 is coupled to the first conversion unit 201, the lookup table 209, and the reproduction unit 205 for first, according to the brightness distribution state of the surface light source that the backlight module 103 actually supplies to the liquid crystal display panel 101. The image frame is divided into multi-region sub-image frames A0~An, and then each region is The image data of the image frames A0~An is multiplied by a compensation value provided by the lookup table 209. In this embodiment, since the brightness distribution state of the surface light source required for the backlight module 103 to be actually supplied to the liquid crystal display panel 101 is reduced from the lower side of the liquid crystal display panel 101 to the upper side thereof, it is conceivable that the sub- The brightness L0 of the image picture A0 will be the brightest, and the brightness L1 of the sub-picture picture A1 will be brightest, and the brightness Ln of the sub-picture picture An will be the darkest.

Therefore, in this embodiment, a plurality of ratios between the brightness L0~Ln of each of the sub-image images A0~An and the brightness Ln of the sub-image picture An having the lowest brightness are recorded in the lookup table 209, and the ratios are Each is the compensation value multiplied by the image data of each zone image screen A0~An. More specifically, the lookup table 209 records a plurality of ratios such as Ln/L0, Ln/L1, Ln/L2, ..., Ln/L(n-1), and Ln/Ln, where Ln/L0 The ratio is the compensation value multiplied by the image data of the sub-picture picture A0, and the ratio of Ln/L1 is the compensation value corresponding to the image data of the sub-picture picture A1, and so on, and so on to Ln/L (n-1). The ratio is the compensation value multiplied by the image data of the sub-picture picture A(n-1), and the ratio of Ln/Ln (that is, 1) is the compensation value corresponding to the image data of the sub-picture picture An. .

Therefore, according to the above content, in this embodiment, the brightness L0~L(n-1) of the remaining sub-image frames A0~A(n-1) is adjusted based on the brightness Ln of the sub-picture picture An as a reference, so that the sub-image is made. Since the brightnesses L0 to Ln of the screens A0 to An are all the same, the brightness of the image screen displayed on the liquid crystal display panel 101 is uniformized.

It is worth mentioning that, since the image data of each sub-image frame A0~An that has been multiplied by the compensation value may have a decimal point, in order to maintain each sub-image image A0~ An original image data performance capability (generally an 8-bit grayscale value), and the reproduction unit 205 processes the image data of each of the sub-image frames A0~An that have been multiplied by the compensation value. Reproduce the image data with the decimal point value.

In this embodiment, the reproducing unit 205 reproduces the decimal point value number of the image data having the decimal point value, and the brightness Ln of the sub-image picture An having the lowest brightness is relative to the sub-image picture A0 having the highest brightness. The ratio between the luminances L0 is determined. Simply put, it is the ratio of L0/Ln. Wherein, when the ratio of L0/Ln is less than 2, the reproducing unit 205 reproduces the number of decimal point values of the image data having the decimal point value as 1 bit; when the ratio of L0/Ln is greater than 2 and less than 4, The current unit 205 reproduces the number of decimal point values of the image data having the decimal point value as 2 bits; when the ratio of L0/Ln is greater than 4 and less than 8, the reproducing unit 205 reproduces the image data having the decimal point value. The number of decimal point digits is 3 bits, so please do not repeat them.

In addition, the reproducing unit 205 accumulates the decimal point value of each M image data that has been multiplied by the compensation value, so that when the carry occurs, the Mth image data that has been multiplied by the compensation value is caused. The integer value is incremented by one, and vice versa, the decimal point value of the M image data that has been multiplied by the compensation value is rounded off, where M is a positive integer.

For example, suppose the M is 3, and the liquid crystal display panel 101 The first column of pixels has 6 pixels (but not limited to this), wherein the image data after the 6 pixels have been multiplied by the compensation value are respectively 26.1 gray scale, 52.3 gray scale, 62.8 gray scale 15.3 gray scale, 52.3 gray scale and 102.3 gray scale, and the value of M must be based on the size of the pixel and the ability of the human eye to discriminate.

Therefore, according to the assumption, the reproducing unit 205 first accumulates the decimal point values of the first three image data that have been multiplied by the compensation value, and then accumulates 0.1 gray scale, 0.3 gray scale, and 0.8 gray scale. Therefore, the recursive unit 205 causes the first three image data that have been multiplied by the compensation value to become 26 gray scale, 52 gray scale, and 63 gray scale. For this reason, if the first three image data that have been multiplied by the compensation value are changed to 26 gray scale, 52 gray scale, and 63 gray scale, and then spatially mixed, the image data having the decimal point value can be made heavy. Now.

Then, the reproducing unit 205 further accumulates the decimal point values of the image data after the third compensation value has been multiplied, that is, the 0.3 gray scale, the 0.3 gray scale, and the 0.3 gray scale are accumulated. Obviously, it does not carry, so the reproduction unit 205 causes the last three image data that have been multiplied by the compensation value to become 15 gray scale, 52 gray scale and 102 gray scale. After that, the reproducing unit 205 will process the remaining pixels of the liquid crystal display panel 101 again, and the processing manner is similar to the above-described example, and thus will not be further described herein.

Furthermore, in order to prevent the liquid crystal display panel 101 from generating a fixed stripe when displaying certain still image screens, the present embodiment is in the 2Nth screen period of the liquid crystal display panel 101 (N is a positive integer), and the reproducing unit 205 The image data of the first pixel of all the even-numbered pixels of the liquid crystal display panel 101 is not processed, and during the (2N+1)th screen of the liquid crystal display panel 101, the reproducing unit 205 does not apply to the liquid crystal. The image data of the first pixel of all odd-numbered pixels of the display panel 101 is processed, thereby overcoming the fixed stripes generated by the liquid crystal display panel 101 when displaying certain still image frames.

Referring to FIG. 1 and FIG. 2, the second converting unit 207 is coupled to the reproducing unit 205 for receiving and converting the image data of each of the sub-image frames A0~An processed by the reproducing unit 205, so as to cause each The gray scale-transmission correspondence of the image data of the area image A0~An is a gamma relationship, and those having ordinary knowledge in the field of the invention should know that the role of the second conversion unit 207 is for each area. The image data of the image frame A0~An is returned to the non-linear gamma action to provide the image data VD' of the compensated image frame to the timing controller 107.

Accordingly, since the image data processing device 105 of the present embodiment can make the brightnesses L0 to Ln of each of the sub-image frames A0 to An uniform, it is undoubted that the brightness of the image displayed by the liquid crystal display panel 101 is uniform. Chemical. In addition, even if the backlight module 103 is assembled, the image data processing device 105 can compensate the image data VD of the image frame, so the design applicability is quite high.

However, the spirit of the present invention is not limited to the embodiments of the above embodiments. That is to say, the backlight module 103 can also be implemented by using a double-sided optical backlight module. Under this condition, the image data processing device 105 still only needs the sub-image with the lowest brightness among all the sub-image frames A0~An. The brightness of the remaining sub-images can be adjusted based on the brightness of the screen as a reference, so that the brightness of the image displayed by the liquid crystal display 100 can be made uniform.

Furthermore, the partition compensation unit 203 can further divide the image frame into two-dimensional multi-region sub-images A according to the brightness distribution state of the surface light source that the backlight module 103 actually supplies to the liquid crystal display panel 101. , 0) ~ A (n, m), and as long as the compensation value corresponding to all the sub-image frames A (0, 0) ~ A (n, m) is recorded in the look-up table 209, the backlight module 103 The multi-edge backlight module can be implemented, so that the image data processing device 105 still needs only the brightness of the sub-image image having the lowest brightness among all the sub-image frames A(0, 0)~A(n, m). The brightness of the remaining sub-image frames can be adjusted for the reference, so that the brightness of the image displayed by the liquid crystal display 100 can be made uniform.

Based on the content disclosed in the above embodiments, a method of processing image data will be summarized below for those skilled in the relevant art of the present invention. FIG. 3 is a flow chart of a method for processing image data according to an embodiment of the present invention. Referring to FIG. 3, the image data processing method of the embodiment includes the following steps: first, converting image data of an image displayed on the liquid crystal display panel, as described in step S301, so as to cause image data of the image frame The gray scale-transmission ratio correspondence is a linear relationship. Then, as described in step S303, according to the brightness distribution state of the surface light source actually supplied to the liquid crystal display panel by the backlight module, the image frame is first divided into multi-region sub-image images, and then the image of each sub-image image is further The data is multiplied by a corresponding compensation value.

In this embodiment, the compensation value corresponding to the image data of each sub-image image is obtained by searching a lookup table. Wherein, the lookup table separately records a plurality of ratios between the brightness of each sub-image image relative to the brightness of the sub-image image having the lowest brightness in the multi-region sub-image image, and the ratios are each The compensation value corresponding to the image data of the sub-picture image.

Then, as described in step S305, the image data of each of the sub-image frames that have been multiplied by the compensation value is processed, and the image data having the decimal point value is reproduced. In this embodiment, the step of reproducing the image data having the decimal point value comprises accumulating the decimal point value of each of the M image data that has been multiplied by the compensation value, so that when the carry is performed, the Mth The integer value of the image data multiplied by the compensation value is incremented by one, and vice versa, the decimal point value of the image data obtained by multiplying the compensation value is discarded.

In addition, in order to prevent the liquid crystal display panel from generating a fixed stripe when displaying certain still image screens, the present embodiment is in the 2Nth screen period of the liquid crystal display panel (N is a positive integer), and all even columns of the liquid crystal display panel are displayed. The image data of the first pixel is not processed, and during the (2N+1)th screen of the liquid crystal display panel, the image data of the first pixel of all odd-numbered pixels of the liquid crystal display panel is not Processing is performed to overcome the fixed streaks generated by the liquid crystal display panel 101 when displaying certain still image frames.

Furthermore, the number of decimal point values that reproduce the image data having the decimal point value will be relative to the brightness of the sub-image picture having the lowest brightness. The ratio between the brightness of the highest brightness sub-picture picture is determined. Finally, as described in step S307, the image data of each sub-image image after the processing is converted, so that the gray-penetration correspondence of the image data of each sub-image image is a gamma relationship.

In summary, the image data processing apparatus and method proposed by the present invention mainly replaces the conventional method of printing a reflective pattern on a light guide plate of a backlight module by compensating the image data of the image frame, such a solution. (solution) does not increase the design cost of the backlight module, and can also achieve uniformity of the brightness of the image displayed by the liquid crystal display to which it is applied. In addition, even if the backlight module has been assembled, the image data processing apparatus and method of the present invention can compensate the image data of the image frame. Therefore, the design of the image data processing apparatus and method of the present invention is quite applicable.

While the present invention has been described in its preferred embodiments, the present invention is not intended to limit the invention, and the present invention may be modified and modified without departing from the spirit and scope of the invention. The scope of protection is subject to the definition of the scope of the patent application.

100‧‧‧LCD display

101‧‧‧LCD panel

103‧‧‧Backlight module

105‧‧‧Image data processing device

107‧‧‧Timing controller

109‧‧‧gate driver

111‧‧‧Source Driver

Video data of VD‧‧‧ video images

VD’‧‧‧Image data of the compensated image

A0~An‧‧‧ sub-image screen

Luminance of L0~Ln‧‧‧ sub-image images

201‧‧‧First conversion unit

203‧‧‧Division compensation unit

205‧‧‧Reproduced unit

207‧‧‧Second conversion unit

209‧‧‧ lookup table

S301~S307‧‧‧ Steps of the flow chart of the image data processing method according to an embodiment of the present invention

1 is a block diagram of a system of a liquid crystal display according to an embodiment of the invention.

FIG. 2 is an internal block diagram of an image data processing apparatus according to an embodiment of the present invention.

FIG. 3 is a flow chart of a method for processing image data according to an embodiment of the present invention.

105‧‧‧Image data processing device

201‧‧‧First conversion unit

203‧‧‧Division compensation unit

205‧‧‧Reproduced unit

207‧‧‧Second conversion unit

209‧‧‧ lookup table

Video data of VD‧‧‧ video images

VD’‧‧‧Image data of the compensated image

Claims (15)

An image data processing device includes: a first converting unit configured to receive and convert image data of an image displayed on a liquid crystal display panel, so as to correspond to gray scale-transmission ratio of image data of the image image The relationship is a linear relationship; a partition compensation unit is coupled to the first conversion unit, and according to a brightness distribution state of a surface light source actually supplied to the liquid crystal display panel by a backlight module, the image frame is first divided into multi-region sub-image images. Then, the image data of each sub-image image is multiplied by a corresponding compensation value; a reproduction unit is coupled to the partition compensation unit for each sub-image frame after the compensation value has been multiplied The image data is processed to reproduce the image data having the decimal point value, wherein the reproducing unit accumulates the decimal point value of each of the M image data that has been multiplied by the compensation value, thereby causing the The integer value of the image data of the Mth multiplied by the compensation value is incremented by one, and vice versa, the decimal point value of the image data of the M times multiplied by the compensation value is added Wherein M is a positive integer; and a second conversion unit coupled to the reproduction unit for receiving and converting image data of each sub-image frame processed by the reproduction unit to make each region The gray scale-transmission ratio of the image data of the image frame is a gamma relationship. The image data processing device of claim 1, further comprising a lookup table coupled to the partition compensation unit for providing the compensation value. The image data processing device of claim 2, wherein the lookup table separately records the brightness of each sub-image image relative to the brightness of the sub-image image having the lowest brightness among the sub-image images. A plurality of ratios, and the ratios are respectively the compensation values multiplied by the image data of each sub-image frame. The image data processing device of claim 2, wherein the reproducing unit reproduces the decimal point value number of the image data having the decimal point value, and the brightness of the sub-image image having the lowest brightness is relative to the possession The ratio between the brightness of the highest brightness sub-picture picture is determined. The image data processing device of claim 1, wherein the reproducing unit does not use the first pixel of all even-numbered pixels of the liquid crystal display panel during the 2Nth screen of the liquid crystal display panel. The image data is processed, and during the (2N+1)th screen of the liquid crystal display panel, the reproducing unit does not process the image data of the first pixel of all odd-numbered pixels of the liquid crystal display panel, wherein N is a positive integer. An image data processing method includes the following steps: converting image data of an image image displayed on a liquid crystal display panel, so that the gray scale-transmission ratio of the image data of the image image is linear; The module is actually supplied to the brightness distribution state of the surface light source of the liquid crystal display panel, and the image frame is first divided into multi-region sub-image images, and then the image data of each sub-image image is multiplied by a corresponding compensation value; The image data of each sub-image frame after the compensation value has been multiplied Processing, by which the image data having the decimal point value is reproduced; and the image data of each sub-image image after the processing is converted, so that the gray-penetration correspondence of the image data of each sub-image image is a gamma relationship; wherein the step of reproducing the image data having the decimal point value comprises accumulating the decimal point value of each of the M image data that has been multiplied by the compensation value, so that when the carry occurs, the Mth The integer value of the image data multiplied by the compensation value is incremented by one, and vice versa, the decimal point value of the M image data multiplied by the compensation value is discarded, where M is a positive integer. The image data processing method of claim 6, wherein the compensation value corresponding to the image data of each of the sub-image images is obtained by searching a lookup table. The image data processing method of claim 7, wherein the lookup table separately records the brightness of each sub-image image relative to the brightness of the sub-image image having the lowest brightness among the sub-image images. A plurality of ratios, and the ratios are respectively the compensation values multiplied by the image data of each sub-image frame. The image data processing method according to claim 6, wherein the decimal point value number of the image data having the decimal point value is reproduced by the brightness of the sub-image picture having the lowest brightness relative to the child having the highest brightness. The ratio between the brightness of the image screen is determined. The image data processing method of claim 6, wherein the image data of the first pixel of all the even-numbered pixels of the liquid crystal display panel does not enter during the 2Nth screen of the liquid crystal display panel The line processing is performed, and during the (2N+1)th screen of the liquid crystal display panel, the image data of the first pixel of all odd-numbered pixels of the liquid crystal display panel is not processed, wherein N is a positive integer. A liquid crystal display comprising: a liquid crystal display panel for displaying an image frame; a backlight module for providing a surface light source required for the liquid crystal display panel; and an image data processing device coupled to the liquid crystal display panel, The image data of the image frame is compensated according to the brightness distribution state of the surface light source that is actually supplied to the liquid crystal display panel, so that the brightness of the image displayed by the liquid crystal display panel is uniform, wherein The image data processing device includes: a first conversion unit configured to receive and convert image data displayed on the image frame such that a gray-penetration relationship of the image data of the image frame is linear; The compensation unit is coupled to the first conversion unit, and according to the brightness distribution state of the surface light source actually supplied to the liquid crystal display panel, the image frame is first divided into multi-region sub-image images, and then each region is further The image data of the image frame is multiplied by a corresponding compensation value; a reproduction unit is coupled to the partition compensation unit for Multiplying the image data of each sub-image frame after the compensation value, and reproducing the image data having the decimal point value, wherein the reproduction unit will for each M image that has been multiplied by the compensation value The decimal point value of the data is accumulated, so that when the carry is performed, the integer value of the Mth image data that has been multiplied by the compensation value is incremented by one, otherwise the M times are multiplied. The decimal point value of the image data after the compensation value is discarded, wherein M is a positive integer; and a second conversion unit coupled to the reproduction unit for receiving and converting each area processed by the reproduction unit The image data of the sub-image frame is such that the gray-penetration correspondence of the image data of each sub-image image is a gamma relationship. The liquid crystal display device of claim 11, wherein the image data processing device further comprises a lookup table coupled to the partition compensation unit for providing the compensation value. The liquid crystal display of claim 12, wherein the lookup table separately records a plurality of brightnesses of each of the sub-image images relative to a brightness of the sub-images having the lowest brightness among the sub-images. The ratio, and the ratios are respectively the multiplication values corresponding to the image data of each sub-image frame. The liquid crystal display of claim 11, wherein the reproducing unit reproduces the decimal point value number of the image data having the decimal point value, and the brightness of the sub-image picture having the lowest brightness is relative to the highest brightness. The ratio between the brightness of the sub-image screen is determined. The liquid crystal display of claim 11, wherein the reproducing unit does not image data of the first pixel of all even-numbered pixels of the liquid crystal display panel during the 2Nth screen of the liquid crystal display panel Processing, and during the (2N+1)th screen of the liquid crystal display panel, the reproducing unit does not process the image data of the first pixel of all odd-numbered pixels of the liquid crystal display panel, where N is A positive integer.