Liquid crystal display device and driving method thereof

[0077] In order to make the objectives, technical solutions and advantages of the present invention clearer, the following further describes the present invention in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention.

[0078] A driving method of a liquid crystal display device, such as figure 1 As shown, the liquid crystal display device includes: a display module 100 for displaying graphic information. The display module includes a plurality of pixel units 110 arranged in an array. The pixel unit 110 includes a red sub-pixel 111, a green sub-pixel 112, and a blue sub-pixel 113. The display module 100 is divided into at least two independent display areas. And the backlight module 300 is provided with a plurality of backlight units 320. The backlight unit includes a red light source, a green light source and a blue light source; the display area corresponds to at least one backlight unit; the backlight units corresponding to different display areas are independent of each other, and the driving method includes:

[0079] Calculate the average gray levels of the red sub-pixels, green sub-pixels and blue sub-pixels in the gray-scale values ​​corresponding to the original gray-scale data to be displayed in each display area, and determine the red sub-pixels and green sub-pixels in each display area The average grayscale value corresponding to the blue sub-pixel.

[0080] During the time period when the second grayscale data set is displayed, the light source of the backlight unit 320 corresponding to each display area that has the same color as the sub-pixel with the smallest average grayscale value in the display area is turned off.

[0081] In one of the embodiments, the method further includes: determining the type of color corresponding to the original grayscale data group to be displayed by each pixel unit 110.

[0082] According to the type of color corresponding to the original gray-scale data group to be displayed by each pixel unit 110, the original gray-scale data group is divided into a first gray-scale data group and a second gray-scale data group according to the set grouping rules, and the three consecutive Output display within the time period.

[0083] The first grayscale data group is a ternary color mixing grayscale data group, a binary color mixing grayscale data group, or a unit color grayscale data group.

[0084] The second grayscale data set is a binary mixed color grayscale data set or a unit color grayscale data set.

[0085] Wherein, the type of color corresponding to the original gray-scale data is determined according to the number of 0 gray-scale data in the original gray-scale data group to be displayed by each pixel unit 110.

[0086] When the original grayscale data set does not include 0 grayscale data, it is determined that the color corresponding to the original grayscale data set is a ternary mixed color.

[0087] When the original grayscale data set includes a 0 grayscale data, it is determined that the color corresponding to the original grayscale data set is a binary mixed color.

[0088] When the original grayscale data group includes two zero grayscale data, it is determined that the color corresponding to the original grayscale data group is a unit color.

[0089] Specific as figure 2 As shown, an embodiment method for determining the type of the color corresponding to the original grayscale data group to be displayed by each pixel unit 110 includes S110-S170.

[0090] S110: Determine whether the original grayscale data group to be displayed by each pixel unit 110 contains zero grayscale data, if yes, perform step S140, otherwise, perform step S120. A certain color is a ternary color mixing type, indicating that the color contains three components of red, green, and blue. In the field of liquid crystal display, it corresponds to the red sub-pixel, green sub-pixel and blue sub-pixel in the pixel unit 110 The grayscale values ​​of are not 0, that is, the corresponding original grayscale data group does not contain 0 grayscale data, so the original grayscale data can be judged by judging whether the original grayscale data group contains 0 grayscale data Whether the group is a ternary mixed color grayscale data group.

[0091] S120: Determine whether the original grayscale data group to be displayed by each pixel unit 110 only contains one 0 grayscale data, if yes, perform step S150, otherwise, perform step S130. A certain color is a binary color mixing type, indicating that the color contains any two colors of the three components of red, green, and blue. In the field of liquid crystal display, it corresponds to the red sub-pixel, green sub-pixel and blue in the pixel unit 110. Only one grayscale value of the color sub-pixel is 0, and the other two are not 0. That is, the corresponding original grayscale data group contains only one 0 grayscale data. Therefore, it can be judged whether there is only one grayscale data in the original grayscale data group. It contains a 0 grayscale data to determine whether the original grayscale data set is a binary mixed color grayscale data set.

[0092] S130: Determine whether the original grayscale data group to be displayed by each pixel unit 110 contains only two zero grayscale data, if yes, perform step S160, otherwise, perform step S170. A certain color is a unit color type, indicating that the color only contains any one of the three components of red, green, and blue. In the field of liquid crystal display, it corresponds to the red sub-pixel, green sub-pixel and blue in the pixel unit 110. Only two gray-scale values ​​of the color sub-pixels are 0, and the other is not 0, that is, the corresponding original gray-scale data group contains only two 0-gray-scale data. Therefore, it can be determined whether the original gray-scale data group is It only contains two 0 grayscale data to determine whether the original grayscale data set is a unit color grayscale data set.

[0093] S140: Determine that the color displayed by the pixel unit 110 corresponding to the grayscale data group is a ternary color mixture.

[0094] S150: Determine that the color displayed by the pixel unit 110 corresponding to the grayscale data group is a binary color mixture.

[0095] S160: Determine that the color displayed by the pixel unit 110 corresponding to the grayscale data group is a unit color.

[0096] S170: Determine that the pixel unit 110 corresponding to the grayscale data group is in the off state. When the grayscale values ​​corresponding to each sub-pixel of a certain pixel unit 110 are all 0, it means that the pixel unit 110 is not responsible for the display task. At this time, the voltage of each sub-pixel of the pixel unit 110 is 0 and is in the off state because the light is not It can transmit liquid crystal, and the pixel unit 110 appears black.

[0097] The grouping rules specifically include:

[0098] The minimum original grayscale data in the original grayscale data group corresponding to the ternary mixed color pixel unit 110 is used as the common grayscale data of the red sub-pixel 111, the green sub-pixel 112, and the blue sub-pixel 113 in the pixel unit 110 to form the first A gray-scale data set.

[0099] The difference data group of the original gray-scale data group corresponding to the ternary color mixing pixel unit 110 minus the first gray-scale data group is used as the second gray-scale data group.

[0100] The 0 grayscale data in the original grayscale data group corresponding to the binary mixed pixel unit 110 is used as the common grayscale data of the red sub-pixel 111, the green sub-pixel 112, and the blue sub-pixel 113 in the pixel unit 110 to form the first Grayscale data set.

[0101] The original grayscale data group corresponding to the binary color mixing pixel unit 110 is used as the second grayscale data group.

[0102] Alternatively, the minimum non-zero gray-scale data in the original gray-scale data set corresponding to the binary mixed pixel unit 110 is used as the common gray-scale data of the sub-pixels corresponding to the two non-zero gray-scale data in the pixel unit 110. The level data together form the first gray level data group. The difference data set obtained by subtracting the first gray scale data set from the original gray scale data set is used as the second gray scale data set of the pixel unit 110.

[0103] Use any zero grayscale data in the original grayscale data group corresponding to the unit color pixel unit 110 as the common grayscale data of the red sub-pixel 111, green sub-pixel 112, and blue sub-pixel 113 in the pixel unit 110 to form the first Grayscale data set. The original gray-scale data set is used as the second gray-scale data set.

[0104] Alternatively, the grayscale data corresponding to half of the grayscale value corresponding to the non-zero grayscale data in the original grayscale data group corresponding to the unit color pixel unit 110 is used as the sub-pixel corresponding to the non-zero grayscale data in the pixel unit 110 The grayscale data of, together with the 0 grayscale data, respectively form a first grayscale data group and a second grayscale data group.

[0105] Among them, such as image 3 The illustrated embodiment is a method for determining the smallest grayscale data in a grayscale data set of ternary mixed colors, which specifically includes steps S210-S260.

[0106] S210: Determine whether the red grayscale value in the original grayscale value group corresponding to the original grayscale data group to be displayed by the ternary color mixing pixel unit 110 is greater than the green grayscale value, if yes, perform step S220; otherwise, perform step S230. This step first judges the relationship between the gray scale value of the red sub-pixel 111 and the gray scale value of the green sub-pixel 112. This is just a case listed for ease of description. In fact, red, green and blue sub-pixels can be used. The grayscale values ​​of any two colors in the pixel are judged first.

[0107] S220: Determine whether the green grayscale value in the original grayscale value group is greater than the blue grayscale value, if yes, perform step S250, otherwise, perform step S240. This step is to compare and judge the smaller grayscale value in step S120 with the grayscale value of another color, and output the corresponding judgment result and action signal.

[0108] S230: Determine whether the red grayscale value in the original grayscale value group is greater than the blue grayscale value, if yes, perform step S250, otherwise, perform step S260. This step is to compare and judge the smaller grayscale value in step S120 with the grayscale value of another color, and output the corresponding judgment result and action signal.

[0109] S240: Determine that the grayscale data corresponding to the green sub-pixel in the original grayscale data group is the minimum original grayscale data.

[0110] S250: Determine that the grayscale data corresponding to the blue sub-pixel in the original grayscale data group is the minimum original grayscale data.

[0111] S260: Determine the grayscale data corresponding to the red sub-pixel in the original grayscale data group as the minimum original grayscale data.

[0112] Such as Figure 4 The illustrated embodiment is a method for judging the smallest non-zero grayscale data in a grayscale data set of binary color mixing, which specifically includes steps S310-S380.

[0113] S310: Determine whether the red grayscale value in the original grayscale value group corresponding to the original grayscale data group to be displayed by the binary color mixing pixel unit 110 is 0, if yes, perform step S320, otherwise, perform step S330.

[0114] A certain color is a binary color mixing type, indicating that the color contains any two colors of the three components of red, green, and blue. In the field of liquid crystal display, it corresponds to the red sub-pixel, green sub-pixel and blue in the pixel unit 110. Only one gray scale value of the color sub-pixel is 0, and the other two are not 0, that is, the corresponding original gray scale data group only contains one 0 gray scale data. This step first judges whether the grayscale value corresponding to the red sub-pixel 111 is 0, which is just a case listed for ease of explanation. In fact, the grayscale value of one of the red, green, and blue sub-pixels can be used for processing. Judge first.

[0115] S320: Determine whether the green grayscale value corresponding to the pixel unit 110 whose red sub-pixel grayscale value is 0 is greater than the blue grayscale value, if yes, perform step S360, otherwise, perform step S370. In this step, when it is determined that the gray scale value corresponding to the red sub-pixel 111 is 0, that is, it is determined that the color displayed by the pixel unit 110 is a mixed color of green and blue, so it is determined whether the green gray scale value and the blue gray scale value are The size relationship can determine the minimum non-zero grayscale data in the original grayscale data group corresponding to the pixel unit 110.

[0116] S330: Determine whether the green gray scale value corresponding to the pixel unit 110 of which the red sub-pixel gray scale value is not 0 is 0, if yes, perform step S350, otherwise, perform step S340. In this step, when it is determined that the gray level value corresponding to the red sub-pixel 111 is not 0, then it is determined whether the gray level value corresponding to the green sub-pixel 112 is 0. This is only a case listed for ease of description, and it may actually be The gray scale value of the blue sub-pixel is used for judgment.

[0117] S340: Determine whether the red grayscale value corresponding to the pixel unit 110 whose blue sub-pixel grayscale value is 0 is greater than the green grayscale value, if yes, perform step S380; otherwise, perform step S370. In this step, when the gray scale value corresponding to the blue sub-pixel 113 is determined to be 0, it is determined that the color displayed by the pixel unit 110 is a mixed color of green and red, so the magnitude of the green gray scale value and the red gray scale value is determined The relationship can determine the minimum non-zero grayscale data in the original grayscale data group corresponding to the pixel unit 110.

[0118] S350: Determine whether the red grayscale value corresponding to the pixel unit 110 whose green sub-pixel grayscale value is 0 is greater than the blue grayscale value, if yes, perform step S360, otherwise, perform step S380. This step is when it is determined that the gray scale value corresponding to the green sub-pixel 112 is 0, that is, it is determined that the color displayed by the pixel unit 110 is a mixed color of red and blue, so it is determined whether the red gray scale value and the blue gray scale value are The size relationship can determine the minimum non-zero grayscale data in the original grayscale data group corresponding to the pixel unit 110.

[0119] S360: Determine that the original gray level data corresponding to the blue sub-pixel in the original gray level data group corresponding to the binary mixed pixel unit 110 is the minimum non-zero gray level data.

[0120] S370: Determine that the original gray level data corresponding to the green sub-pixel in the original gray level data group corresponding to the binary color mixing pixel unit 110 is the minimum non-zero gray level data.

[0121] S380: Determine that the original gray level data corresponding to the red sub-pixel in the original gray level data group corresponding to the binary mixed pixel unit 110 is the minimum non-zero gray level data.

[0122] In the grouping rule, due to the rapid saturation increase of the brightness ratio of the grayscale liquid crystal display, the lower the grayscale value, the greater the difference between the front view brightness and the side view brightness. Therefore, in order to highlight the main color and improve the color shift, the original The lowest gray-level data in the gray-level data group is displayed in a separate set of gray-level data, and the colors that do not contain the lowest gray-level data can be displayed in other groups, so as to eliminate the lowest gray-level color in the group due to gray The rapid saturation increase of the viewing angle brightness ratio of the multi-level liquid crystal display affects the display of the main color. In order to explain the grouping rules more clearly and directly, the following grouping descriptions are made with grayscale value groups. It should be noted that the grouping process is the data grouping performed when the original grayscale data group is processed. Here, the grayscale value group is used to illustrate only For convenience and simplicity:

[0123] Suppose that the original grayscale data group corresponding to a certain pixel unit 110 is converted into the original grayscale value group (A, B, C), that is, the gray level value corresponding to the red sub-pixel 111 is A, and the gray level corresponding to the green sub-pixel 112 is The value is B, the gray scale value corresponding to the blue sub-pixel 113 is C, when A> B> At C, it can be determined that the gray scale value corresponding to the blue sub-pixel 113 is the smallest gray scale value among the original gray scale values, that is, the lowest gray scale value, and the difference between the front viewing angle brightness and the side viewing angle brightness of the lowest gray scale value is the largest . In order to reduce the influence of the lowest grayscale value, the lowest grayscale value is now used as the common grayscale value of the red sub-pixel 111, the green sub-pixel 112, and the blue sub-pixel 113 to form the first gray-scale value group, namely (C , C, C). In the original gray-scale data, the gray-scale values ​​corresponding to the red sub-pixel 111, the green sub-pixel 112, and the blue sub-pixel 113 are respectively subtracted from the difference group of the lowest gray-scale value as the second gray-scale value group, namely (AC , BC, 0). With such a setting, the low grayscale value can be removed from the second grayscale value group, and its influence on the color shift in the case of large viewing angles when the second grayscale value group is displayed is eliminated. The ratio of the decomposed main color grayscale value to the low grayscale value has been improved. Therefore, not only the color cast under the side viewing angle is improved, but also the brightness of the main color is improved.

[0124] In the above content, the gray-scale value data group and the gray-scale value group are based on the pixel unit 110 as the smallest unit, and each includes the gray-scale data corresponding to the red sub-pixel 111, the green sub-pixel 112, and the blue sub-pixel 113. Or a data group composed of grayscale values. The original grayscale data group refers to the original grayscale value data group input by the display device including red, green, and blue grayscale data. The original grayscale value group refers to the grayscale value group including red, green, and blue grayscale data directly converted from the original grayscale array.

[0125] In the above grouping rules, the original gray-scale data group corresponding to the binary color mixing and the unit color is decomposed into three groups of gray-scale data groups in order to maintain synchronization with the execution control mode of the gray-scale data group of the ternary color mixing, which is convenient for driving and control.

[0126] In addition, the liquid crystal display device further includes a driving module 200. The driving module 200 is used to receive, process, and output driving data. The driving method further includes increasing the driving frequency of each pixel unit 110 to 1 to 3 times the original to compensate for the reduced display speed due to grayscale value decomposition. The original grayscale value is decomposed into two grayscale values ​​and displayed in two consecutive time periods, so that the display time of the screen becomes twice the original, that is, the display speed is reduced to half of the original, in order to compensate The reduced display speed due to grayscale value decomposition can increase the driving frequency.

[0127] In one of the embodiments, the driving frequency of each pixel unit 110 is doubled to maintain the display speed of the pixel unit 110 after the grayscale value decomposition is the same as the display speed before the grayscale value decomposition. This setting is to make the smoothness effect of the image after the grayscale value decomposition display is basically the same as the smoothness effect of the original grayscale data display, and improve the color shift problem of the liquid crystal display without damaging the original visual effect.

[0128] In one of the implementations, the backlight module 300 includes a backlight unit 320 for providing red, green, and blue backlight light sources, and the driving method further includes increasing the brightness of the color lamps controlled to be lit in the backlight unit 320 to the original 1 to 3 times to compensate for the reduced display brightness due to the grayscale value decomposition, or the increase of the driving frequency, or the combined action of the grayscale value decomposition and the increase of the driving frequency. Because the process of gray-scale value decomposition is to decompose the original high-gray-scale value into two new low-gray-scale values, that is, in practice, a group of high-voltage signals is decomposed into two groups of low-voltage signals, so the brightness will be reduced. . On the other hand, because the original grayscale value is decomposed into two grayscale values ​​and displayed in two consecutive time periods, the display time of the screen becomes twice as long, that is, the display speed is reduced to the original two points. One, in order to compensate for the reduced display speed due to grayscale value decomposition, the drive frequency is generally increased. After the drive frequency is increased, the actual display time of each set of grayscale data sets is smaller than the original drive frequency. The brightness decreases. For example, if the original driving frequency is increased to twice the original driving frequency, the actual display time of the driving signal becomes 1/2 of the original driving signal time, resulting in a decrease in brightness. In order to compensate for the reduced brightness due to the grayscale value decomposition or the increase in the driving frequency, or the simultaneous action of the grayscale value decomposition and the increase in the driving frequency, the backlight brightness can be increased.

[0129] In one of the embodiments, the brightness of the color lamps controlled to be lit in the backlight unit 320 is increased to twice the original brightness to maintain the brightness of the pixel unit 110 after the grayscale value decomposition and the brightness before the grayscale value decomposition. The brightness is the same. The purpose of this setting is to make the decomposed display effect of the grayscale value basically the same as the original grayscale data display effect, so as to improve the color cast problem of the liquid crystal display without damaging the original visual effect.

[0130] In some embodiments, the pixel unit 110 includes a plurality of sub-pixels with different colors. For example, yellow sub-pixels can be included.

[0131] In the above-mentioned liquid crystal display device and its driving method, the display module is divided into a plurality of mutually independent display areas, and at least one backlight unit 320 corresponding to each display area is provided on the backlight panel. According to the color type corresponding to the original gray-scale data group to be displayed by each pixel unit 110, the original gray-scale data group is decomposed into a first gray-scale data group and a second gray-scale data group through the set grouping rules, and the two Displayed in consecutive time periods. By calculating the average gray scale values ​​of the red sub-pixels, green sub-pixels, and blue sub-pixels in the gray-scale values ​​corresponding to the original gray-scale data to be displayed in each display area, and respectively determine the red sub-pixels and green sub-pixels in each display area The average grayscale value corresponding to the sub-pixel and the blue sub-pixel. According to the size relationship of the average grayscale value of the display area, when controlling the display of the decomposed grayscale data group, turn off most of the backlight lamps of the corresponding color with the grayscale value of 0. This setting increases the brightness ratio of the main color, so that the color shift of the large viewing angle main color affected by the low-voltage sub-pixel is improved. At the same time, the main signal brightness is increased in the case of a large viewing angle. And by increasing the backlight brightness to twice the original brightness, the overall image quality display brightness can be maintained, and by increasing the driving frequency to twice the original driving frequency, the overall image quality display speed can be maintained unchanged. In addition, the present invention can not only realize energy saving while improving the color shift, but also does not require additional wiring on the liquid crystal display panel.

[0132] The present invention also provides a driving method for a specific display area of ​​a liquid crystal display device. The liquid crystal display device includes a display module 100. The display module includes a plurality of pixel units 110 arranged in an array. The pixel unit 110 includes a red sub-pixel 111, a green sub-pixel 112, and a blue sub-pixel 113. The display module 100 is divided into at least two independent display areas. The backlight module 300 is provided with a plurality of backlight units 320. The backlight unit includes a red light source, a green light source, and a blue light source; the display area corresponds to at least one backlight unit 320. Driving methods include:

[0133] Calculate the average gray-scale values ​​of the red sub-pixels, green sub-pixels, and blue sub-pixels in the gray-scale values ​​corresponding to the original gray-scale data to be displayed in the Nth display area.

[0134] Determine the average grayscale values ​​corresponding to the red sub-pixels, green sub-pixels, and blue sub-pixels in the Nth display area. For the method or step of determining the average gray scale values ​​corresponding to the red sub-pixel, the green sub-pixel, and the blue sub-pixel in the Nth display area, refer to the foregoing steps S210-S260.

[0135] During the time period of displaying the second grayscale data set, the light source of the backlight unit 320 corresponding to the Nth display area and the sub-pixel with the smallest average grayscale value in the display area is turned off.

[0136] n and N are integers greater than or equal to 1.

[0137] In one of the embodiments, the method further includes: determining the type of the color corresponding to the original grayscale data group to be displayed by the nth pixel unit 110. The judgment method or steps are the same as the above steps S110-S170.

[0138] According to the color type corresponding to the original gray-scale data group to be displayed by the n-th pixel unit 110, the original gray-scale data group is divided into a first gray-scale data group and a second gray-scale data group according to a set grouping rule. The grouping rules are the same as the above-mentioned "grouping rules".

[0139] The first grayscale data set and the second grayscale data set are output and displayed in two consecutive time periods respectively.

[0140] The first grayscale data group is a ternary color mixing grayscale data group, a binary color mixing grayscale data group, or a unit color grayscale data group.

[0141] The second grayscale data set is a binary mixed color grayscale data set or a unit color grayscale data set.

[0142] The above-mentioned liquid crystal display device may have the following characteristics:

[0143] Including: a display module 100 for displaying graphic information. The display module includes a plurality of pixel units 110 arranged in an array. The pixel unit 110 includes a red sub-pixel 111, a green sub-pixel 112, and a blue sub-pixel 113. The display module 100 is divided into at least two independent display areas. The driving module 200 is used to receive, process and output driving data to control the normal operation of the display module. The driving module 200 includes a grayscale data decomposition processing unit 210. The grayscale value decomposition processing unit 210 is configured to decompose the original grayscale data set to be displayed into a first grayscale data set and a second grayscale data set, and output the first grayscale data in two consecutive time periods, respectively The grayscale values ​​corresponding to the group and the second grayscale data group. And the backlight module 300 is provided with a plurality of backlight units 320. The backlight unit includes a red light source, a green light source, and a blue light source. The display area corresponds to at least one backlight unit 320. The backlight units 320 corresponding to different display areas are independent of each other.

[0144] The above-mentioned driving method of the liquid crystal display device can make the liquid crystal display device use the above-mentioned driving method for a set area or for a partial area according to the nature of the display data. Such a setting can increase the brightness ratio of the main color in the liquid crystal display area using the above driving method, so that the color shift of the main color of the large viewing angle affected by the low voltage sub-pixel can be improved. In addition, the liquid crystal display area using the above driving method can increase the main signal brightness in the case of large viewing angles, and the brightness of the backlight can be increased to twice the original brightness to maintain the brightness of the overall image quality display, and by increasing the driving The frequency is twice the original driving frequency, which can maintain the speed of the overall image quality display. At the same time, the present invention does not require additional wiring on the liquid crystal display panel.

[0145] The invention also provides three other driving methods for liquid crystal displays.

[0146] Driving method one:

[0147] A driving method of a liquid crystal display device, such as figure 1 As shown, the liquid crystal display device includes a display module 100 and a backlight module 300. The display module 100 includes a plurality of pixel units 110 arranged in an array, and the pixel unit 110 includes a red sub-pixel 111, a green sub-pixel 112 and a blue sub-pixel 113. The pixel unit 110 generates a color every time it receives a grayscale value group. The gray scale value group is generated by the gray scale data input to the display device. The gray scale value group includes red gray scale values, green gray scale values, and blue gray scale values. The color generated by the pixel unit 110 each time is any one of three types of unit color, binary color mixing, and ternary color mixing. The backlight module 300 includes a power processing unit 310 and a backlight unit 320. The backlight unit 320 includes a red light source, a green light source, and a blue light source. The driving module 200 includes a grayscale data decomposition processing unit 210, a driving frequency adjustment unit 220, and a backlight adjustment unit 230. Among them, the display module 100 is used to display graphic information. The driving module 200 is used to receive, process and output driving data to control the normal operation of the display module 100. The backlight module 300 is used for current processing and lighting the backlight unit 320. The backlight unit 320 includes a red light source, a green light source, and a blue light source. The display module 100 is divided into at least two independent display areas. The display area corresponds to at least one backlight unit 320, and the backlight units 320 corresponding to different display areas are independent of each other. The grayscale value decomposition processing unit 210 is used to decompose the original grayscale data corresponding to each input pixel unit 110 into three sets of new grayscale data, and output the red sub-pixel 111, green sub-pixel 112, and blue sub-pixel in each pixel unit 110. The grayscale values ​​of the color sub-pixels 113 in three consecutive time periods. The driving frequency adjustment unit 220 is used to adjust the driving frequency. The backlight adjustment unit 230 is used to adjust the color and brightness of the backlight unit 320. Driving methods include:

[0148] The average grayscale value of the red subpixel 111, the average grayscale value of the green subpixel 112, and the average grayscale value of the blue subpixel 113 among the grayscale values ​​corresponding to the original grayscale data to be displayed in each display area are respectively calculated. and

[0149] Determine the average grayscale value of the red sub-pixel 111, the average grayscale value of the green sub-pixel 112, and the average grayscale value of the blue sub-pixel 113 in each display area.

[0150] During the time period when the second grayscale data set is displayed, the light source of the backlight unit 320 corresponding to each display area with the same color as the sub-pixel with the smallest average grayscale value in each display area is turned off.

[0151] During the time period when the third grayscale data set is displayed, the light source of the backlight unit 320 corresponding to each display area that is different from the sub-pixel color of the maximum average grayscale value in each display area is turned off.

[0152] In one of the embodiments, the type of color corresponding to the original grayscale data group to be displayed by each pixel unit 110 is determined. According to the type of color corresponding to the original gray-scale data group to be displayed by each pixel unit 110, the original gray-scale data group is divided into a first gray-scale data group, a second gray-scale data group, and a third gray-scale data group according to a set grouping rule. . The first gray-scale data set, the second gray-scale data set, and the third gray-scale data set are respectively output and displayed in three consecutive time periods. The first grayscale data group is a ternary color mixing grayscale data group, a binary color mixing grayscale data group, or a unit color grayscale data group. The second grayscale data set is a binary mixed color grayscale data set or a unit color grayscale data set. The third grayscale data group is a unit color grayscale data group.

[0153] The grouping rules specifically include:

[0154] The minimum original grayscale data in the original grayscale data group corresponding to the ternary mixed color pixel unit 110 is used as the common grayscale data of the red sub-pixel 111, the green sub-pixel 112, and the blue sub-pixel 113 in the pixel unit 110 to form the first A gray-scale data set.

[0155] The original grayscale data group corresponding to the ternary color mixing pixel unit 110 minus the smallest non-zero grayscale data in the difference data group of the first grayscale data group is used as the subpixel corresponding to the non-zero grayscale data in the difference data group The common gray-scale data of, and the zero-gray data form the second gray-scale data group.

[0156] The original grayscale data set corresponding to the ternary color mixing pixel unit 110 is respectively subtracted from the difference data set of the first grayscale data set and the second grayscale data set as the third grayscale data set.

[0157] The gray-scale data corresponding to half of the gray-scale value corresponding to the smallest non-zero gray-scale data in the original gray-scale data set corresponding to the binary mixed pixel unit 110 is used as the sub-pixel corresponding to the two non-zero gray-scale data in the pixel unit 110 The common gray level data of the pixels, together with the zero gray level data, respectively form a first gray level data group and a second gray level data group.

[0158] The original gray-scale data set corresponding to the binary color mixing pixel unit 110 minus the difference data set of the first gray-scale data set and the second gray-scale data set is used as the third gray-scale data set.

[0159] The gray-scale data corresponding to one third of the gray-scale value corresponding to the non-zero gray-scale data in the original gray-scale data group corresponding to the unit color pixel unit 110 is used as the sub-pixel corresponding to the non-zero gray-scale data in the pixel unit 110 The grayscale data of the pixels, together with the zero grayscale data, respectively form a first grayscale data group, a second grayscale data group, and a third grayscale data group.

[0160] Suppose that the original grayscale data group corresponding to a certain pixel unit 110 is converted into the original grayscale value group (A, B, C), that is, the gray level value corresponding to the red sub-pixel 111 is A, and the gray level corresponding to the green sub-pixel 112 is The value is B, the gray scale value corresponding to the blue sub-pixel 113 is C, when A> B> At C, it can be determined that the gray scale value corresponding to the blue sub-pixel 113 is the smallest gray scale value among the original gray scale values, that is, the lowest gray scale value, and the difference between the front viewing angle brightness and the side viewing angle brightness of the lowest gray scale value is the largest . In order to reduce the influence of the lowest grayscale value, the lowest grayscale value is now used as the common grayscale value of the red sub-pixel 111, the green sub-pixel 112, and the blue sub-pixel 113 to form the first gray-scale value group, namely (C , C, C). The grayscale values ​​corresponding to the red sub-pixel 111, the green sub-pixel 112, and the blue sub-pixel 113 in the original grayscale data are respectively subtracted from the smallest non-zero grayscale data in the difference group of the lowest grayscale value as the difference The common gray-scale data of the non-zero gray-scale data in the value group is used as the second gray-scale value group, namely (BC, BC, 0). The gray scale values ​​corresponding to the red sub-pixel 111, the green sub-pixel 112, and the blue sub-pixel 113 in the original gray-scale data group are respectively subtracted from the difference between the first gray-scale value group and the second gray-scale value group as the third gray Order value group, namely (AB, 0, 0). With this setting, the low grayscale values ​​can be removed in the second grayscale value group and the third grayscale value group, eliminating the large viewing angle when the second grayscale value group and the third grayscale value group are displayed. In the overall effect of continuous display of the three groups of grayscale values, the brightness change characteristics of each unit color under the large viewing angle of the liquid crystal display shows that the sum of the grayscale values ​​of the main colors after decomposition is relatively low The ratio of values ​​has been improved, therefore, not only the color cast in the side viewing angle is improved, but also the brightness of the main color is improved.

[0161] In the above content, the gray-scale value data group and the gray-scale value group are based on the pixel unit 110 as the smallest unit, and each includes the gray-scale data corresponding to the red sub-pixel 111, the green sub-pixel 112, and the blue sub-pixel 113. Or a data group composed of grayscale values. The original grayscale data group refers to the original grayscale value data group input by the display device including red, green, and blue grayscale data. The original grayscale value group refers to the grayscale value group including red, green, and blue grayscale data directly converted from the original grayscale array.

[0162] In the above grouping rules, the original gray-scale data group corresponding to the binary color mixing and the unit color is decomposed into three groups of gray-scale data groups in order to maintain synchronization with the execution control mode of the gray-scale data group of the ternary color mixing, which is convenient for driving and control.

[0163] In addition, the liquid crystal display device further includes a driving module 200. The driving module 200 is used to receive, process and output driving data. The driving method also includes increasing the driving frequency of each pixel unit 110 to 1 to 4 times the original to compensate for the reduced display speed due to grayscale value decomposition. The original grayscale value is decomposed into three grayscale values ​​and displayed in three consecutive time periods, so that the display time of the screen becomes three times the original, that is, the display speed is reduced to one third of the original, in order to compensate The reduced display speed due to grayscale value decomposition can increase the driving frequency.

[0164] In one of the embodiments, the driving frequency of each pixel unit 110 is increased by 3 times to maintain the display speed of the pixel unit 110 after the grayscale value decomposition is the same as the display speed before the grayscale value decomposition. This setting is to make the smoothness effect of the image after the grayscale value decomposition display is basically the same as the smoothness effect of the original grayscale data display, and improve the color shift problem of the liquid crystal display without damaging the original visual effect.

[0165] In one of the embodiments, the backlight module 300 includes a backlight unit 320 for providing red, green, and blue backlight light sources, and the driving method includes: increasing the brightness of the color lamps that are controlled to be lit in the backlight unit 320 to the original 1 to 4 times to compensate for the reduced display speed due to grayscale value decomposition. Because the process of gray-scale value decomposition is to decompose the original high-gray-scale value into three new low-gray-scale values, that is, in practice, a group of high-voltage signals is decomposed into three groups of low-voltage signals, so the brightness will decrease . On the other hand, because the original one grayscale value is decomposed into two grayscale values ​​and displayed in three consecutive time periods, the display time of the screen becomes three times the original, that is, the display speed is reduced to three points. One, in order to compensate for the reduced display speed due to grayscale value decomposition, the drive frequency is generally increased. After the drive frequency is increased, the actual display time of each set of grayscale data sets is smaller than the original drive frequency. The brightness decreases. For example, if the original driving frequency is increased to three times the original driving frequency, the actual display time of the driving signal becomes 1/3 of the original driving signal time, resulting in a decrease in brightness. In order to compensate for the reduced brightness due to the grayscale value decomposition or the increase in the driving frequency, or the combined action of the grayscale value decomposition and the increase in the driving frequency, the backlight brightness can be increased.

[0166] In one of the embodiments, the brightness of the color lights in the backlight unit 320 that are controlled to be lit is increased to three times the original brightness to maintain the brightness of the pixel unit 110 after the grayscale value decomposition and the brightness before the grayscale value decomposition. The brightness is the same. The purpose of this setting is to make the decomposed display effect of the grayscale value basically the same as the original grayscale data display effect, so as to improve the color cast problem of the liquid crystal display without damaging the original visual effect.

[0167] The above-mentioned driving method of the liquid crystal display device is achieved by dividing the display module 100 into a plurality of mutually independent display areas, and arranging at least one backlight unit 320 corresponding to each display area on the backlight panel. According to the color type corresponding to the original gray-scale data set to be displayed by each pixel unit 110, the original gray-scale data set is decomposed into a first gray-scale data set, a second gray-scale data set, and a third gray-scale according to the set grouping rules. Data group Three gray-scale data groups, which are displayed in three consecutive time periods. By calculating the average gray scale values ​​of the red sub-pixel 111, the green sub-pixel 112, and the blue sub-pixel 113 in the gray-scale values ​​corresponding to the original gray-scale data to be displayed in each display area, respectively, the red sub-pixels in each display area are determined. The magnitude of the average grayscale value corresponding to the pixel 111, the green sub-pixel 112, and the blue sub-pixel 113. According to the size relationship of the average grayscale value of the display area, when controlling the display of the decomposed grayscale data set, most of the backlight units 320 of the corresponding color with the grayscale value of 0 are turned off. This setting increases the brightness ratio of the main color, so that the color shift of the large viewing angle main color affected by the low-voltage sub-pixel is improved. Increased the main signal brightness in the case of large viewing angles. At the same time, by increasing the brightness of the backlight to twice the original brightness, the brightness of the overall picture quality display can be maintained, and by increasing the driving frequency to twice the original driving frequency, the speed of the overall picture quality display can be maintained unchanged. In addition, energy saving can be achieved while improving color cast. And there is no need for additional wiring on the LCD panel.

[0168] Driving method two:

[0169] A driving method of a liquid crystal display device, such as figure 1 As shown, the liquid crystal display device includes a display module 100 and a backlight module 300. The display module 100 includes a plurality of pixel units 110 arranged in an array, and the pixel unit 110 includes a red sub-pixel 111, a green sub-pixel 112 and a blue sub-pixel 113. The pixel unit 110 generates a color every time it receives a grayscale value group. The gray scale value group is generated by the gray scale data input to the display device. The gray scale value group includes red gray scale values, green gray scale values, and blue gray scale values. The color generated by the pixel unit 110 each time is any one of three types of unit color, binary color mixing, and ternary color mixing. The backlight module 300 includes a power processing unit 310 and a backlight unit 320. The driving module 200 includes a grayscale data decomposition processing unit 210, a driving frequency adjustment unit 220, and a backlight adjustment unit 230. Among them, the display module 100 is used to display graphic information. The driving module 200 is used to receive, process and output driving data to control the normal operation of the display module 100. The backlight module 300 is used for current processing and lighting the backlight unit 320. The backlight unit 320 includes a red light source, a green light source, and a blue light source. The display module 100 is divided into at least two independent display areas. The display area corresponds to at least one backlight unit 320, and the backlight units 320 corresponding to different display areas are independent of each other. The grayscale value decomposition processing unit 210 is used to decompose the original grayscale data corresponding to each input pixel unit 110 into three sets of new grayscale data, and output the red sub-pixel 111, green sub-pixel 112, and blue sub-pixel in each pixel unit 110. The grayscale values ​​of the color sub-pixels 113 in three consecutive time periods. The driving frequency adjustment unit 220 is used to adjust the driving frequency. The backlight adjustment unit 230 is used to adjust the color and brightness of the backlight unit 320. Driving methods include:

[0170] Calculate the average grayscale value of the red sub-pixel 111, the average grayscale value of the green sub-pixel 112, and the average grayscale value of the blue sub-pixel 113 among the grayscale values ​​corresponding to the original grayscale data to be displayed in the Nth display area .

[0171] Determine the average grayscale value of the red sub-pixel 111, the average grayscale value of the green sub-pixel 112, and the average grayscale value of the blue sub-pixel 113 in the Nth display area.

[0172] During the time period for displaying the second grayscale data set, the light source of the backlight unit 320 corresponding to the Nth display area with the same color as the sub-pixel with the smallest average grayscale value in the Nth display area is turned off.

[0173] During the time period when the third grayscale data set is displayed, the light source of the backlight unit 320 corresponding to the Nth display area that is different from the sub-pixel color of the maximum average grayscale value in the Nth display area is turned off.

[0174] N is an integer greater than or equal to 1.

[0175] In one of the embodiments, the method further includes: determining the type of color corresponding to the original gray-scale data according to the number of 0 gray-scale data in the original gray-scale data group to be displayed by the n-th pixel unit 110.

[0176] When the original grayscale data set does not include 0 grayscale data, it is determined that the color corresponding to the original grayscale data set is a ternary mixed color.

[0177] When the original grayscale data set includes only one 0 grayscale data, it is determined that the color corresponding to the original grayscale data set is a binary mixed color.

[0178] When the original gray-scale data set includes only two 0 gray-scale data, it is determined that the color corresponding to the original gray-scale data set is a unit color.

[0179] n is an integer greater than or equal to 1.

[0180] In one of the embodiments, the method further includes: dividing the original gray-scale data group into a first gray-scale data group according to a set grouping rule according to the color type of the original gray-scale data group to be displayed by the n-th pixel unit 110, The second grayscale data set and the third grayscale data set.

[0181] The first gray-scale data set, the second gray-scale data set, and the third gray-scale data set are respectively output and displayed in three consecutive time periods.

[0182] n is an integer greater than or equal to 1.

[0183] In one of the embodiments, the first grayscale data set is a ternary mixed color grayscale data set, a binary mixed color grayscale data set, or a unit color grayscale data set.

[0184] The second grayscale data set is a binary mixed color grayscale data set or a unit color grayscale data set.

[0185] The third grayscale data group is a unit color grayscale data group.

[0186] The above-mentioned driving method of the liquid crystal display device is achieved by dividing the display module 100 into a plurality of mutually independent display areas, and arranging at least one backlight unit 320 corresponding to each display area on the backlight panel. According to the color type corresponding to the original gray-scale data group to be displayed by the n-th pixel unit 110, the original gray-scale data group is decomposed into the first gray-scale data group, the second gray-scale data group, and the third gray-scale data group according to the set grouping rules. Grayscale data group Three grayscale data groups are displayed in three consecutive time periods. By calculating the average gray level value of the red sub-pixel 111, the average gray level value of the green sub-pixel 112, and the average gray level value of the blue sub-pixel 113 in the gray-scale values ​​corresponding to the original gray-scale data to be displayed in the Nth display area, respectively The average gray scale value of the red sub-pixel 111, the average gray scale value of the green sub-pixel 112, and the average gray scale value of the blue sub-pixel 113 in the Nth display area are respectively determined. According to the size relationship of the average grayscale value of the display area, when controlling the display of the decomposed grayscale data set, most of the backlight units 320 of the corresponding color with the grayscale value of 0 are turned off. Such a setting improves the brightness ratio of the main tones of a specific display area, so that the color shift of the main tones of large viewing angles affected by the low-voltage sub-pixels is improved. Increased the main signal brightness in the case of a large viewing angle in a specific display area. At the same time, the specific display area can maintain the overall image quality display brightness by increasing the backlight brightness to twice the original brightness, and the specific display area can maintain the overall image quality display speed by increasing the driving frequency to twice the original driving frequency constant. In addition, while improving the color cast of a specific display area, energy saving can be achieved. And there is no need for additional wiring on the LCD panel.

[0187] Driving method three.

[0188] A method for driving a liquid crystal display device. The liquid crystal display device includes a display module 100 and a backlight module 300. The display module 100 includes a plurality of pixel units 110 arranged in an array, and the pixel unit 110 includes a red sub-pixel 111, a green sub-pixel 112 and a blue sub-pixel 113. The color generated by the pixel unit 110 each time is any one of three types of unit color, binary color mixing, and ternary color mixing. The backlight module 300 is provided with a plurality of backlight units 320. The backlight unit 320 includes a red light source, a green light source, and a blue light source. The display module 100 is divided into at least two independent display areas. The display area corresponds to at least one backlight unit 320, and the backlight units 320 corresponding to different display areas are independent of each other. The method includes:

[0189] Calculate the average grayscale value of the red sub-pixel 111, the average grayscale value of the green sub-pixel 112, and the average grayscale value of the blue sub-pixel 113 among the grayscale values ​​corresponding to the original grayscale data to be displayed in each display area.

[0190] Determine the average grayscale value of the red sub-pixel 111, the average grayscale value of the green sub-pixel 112, and the average grayscale value of the blue sub-pixel 113 in each display area.

[0191] Determine whether the number of pixel units 110 of the display unit color in the display area reaches the first set value, and if so, the color of the sub-pixels in the backlight unit 320 corresponding to the display area and the maximum average gray scale value in the Nth display area is different The light source is turned off.

[0192] When the display areas in the display module 100 are physically divided, each display area is fixed and relatively independent. The patterns displayed in each display area are different according to the overall needs. Some display areas only display one color, and some display two or more colors. Or basically speaking, some display areas only display unit colors, or only display binary colors, or only display ternary colors, while some display areas can include display unit colors, binary colors or ternary colors. Any combination of two or three. In some display areas, although the pixel units 110 of a certain color mixing type are relatively few in a certain display stage, when they are more concentrated in a certain range of pixel blocks, if the display area corresponds to the backlight according to the general control method The color light corresponding to the minimum average grayscale value in the unit 320 is turned off, or the grayscale value of the color corresponding to the minimum average grayscale value in the display area is set to 0, which will affect the image quality. Seriously, it will affect the integrity of the picture. Therefore, it is necessary to make more refined control of this situation when carrying out the overall control rules. When the number of pixel units 110 of the display unit color in the display area reaches the first set value, the light source of the backlight unit 320 corresponding to the display area that is different from the sub-pixel color of the maximum average grayscale value in the display area is turned off. Among them, "when the number of pixel units 110 of the display unit color in the display area reaches the first set value" means that the unit color pixel units 110 in a certain display area occupies the vast majority. At this time, the characteristics of the display area are mainly Dominated by the unit color, according to the control rule of the unit color, the light source of the backlight unit 320 corresponding to the display area and the sub-pixel color of the maximum average gray scale value in the display area is controlled to be turned off or on, which can change the display of the display area. The picture or the influence of the picture on the display area can be ignored.

[0193] In one of the embodiments, the method further includes: determining whether there is a pixel block in the display area where the number of the pixel units 110 of the display unit color reaches the second set value, and if so, maintaining the second set value in the backlight unit 320 corresponding to the display area. The light sources with different sub-pixel colors of the maximum average grayscale value in the N display areas are turned on. Otherwise, the light source in the backlight unit 320 corresponding to the display area that is different from the sub-pixel color of the maximum average grayscale value in the Nth display area is turned off. In this embodiment, "determine whether there is a pixel block in the display area where the number of pixel units 110 of the display unit color reaches the second set value" is for illustration, although a certain unit color accounts for the extreme of the pixel units 110 in the total display area. However, the unit color is not scattered in the entire display area, but concentrated in a certain pixel block. When the number of pixel units 110 of the unit color reaches a certain set value, the display area The displayed picture is affected, that is, there may be a certain color whose average grayscale value is the smallest for the entire display area, but for a pixel block in the display area, the average grayscale value of that color If it is not the smallest in the pixel block, and the effect of the color on the pixel block cannot be ignored, it is necessary to maintain the backlight unit 320 corresponding to the display area during the time period for displaying the grayscale data group. The color lamp corresponding to the minimum average grayscale value is turned on, but the color lamp corresponding to the minimum average grayscale value in the backlight unit 320 corresponding to the display area cannot be turned off according to the usual practice. Otherwise it will affect the image quality or affect the integrity of the picture. For example, a certain display area is divided into a first pixel block, a second pixel block, and a third pixel block. The first pixel block displays the red unit color, the second pixel block displays the green unit color, and the third pixel block The block displays blue cells, and the area of ​​the first pixel block is larger than the second pixel block, and the second pixel block is larger than the third pixel block. At this time, for the entire display area, the average gray scale value of the blue sub-pixel 113 is the smallest, but for the third pixel block at this time, the blue sub-pixel 113 is its main color. The color light corresponding to the blue sub-pixel 113 with the smallest average gray scale value in the area is turned off, and the third pixel block cannot be displayed, which may seriously affect the originally displayed image.

[0194] In one of the embodiments, the method further includes:

[0195] Determine whether the number of pixel units 110 displaying binary color mixing in the display area reaches the third set value, and if so, select the light source of the backlight unit 320 corresponding to the display area with the same color as the sub-pixel with the smallest average grayscale value in the display area shut down. When the number of pixel units 110 displaying binary color mixing in the display area reaches the third set value, the light source of the backlight unit 320 corresponding to the display area with the same color as the sub-pixel with the smallest average gray scale value in the display area is turned off. Among them, "when the number of pixel units 110 displaying binary color mixing in the display area reaches the third set value" means that the binary color mixing pixel units 110 in a certain display area occupies the vast majority. At this time, the characteristics of the display area Mainly dominated by binary color mixing, according to the control rules of binary color mixing, the backlight unit 320 corresponding to the display area is controlled to turn off or on the light source with the same color as the sub-pixel with the smallest average grayscale value in the display area, which can change the display area The display screen or the influence on the display screen of the display area can be ignored. It can achieve energy saving while ensuring that the original picture is less affected.

[0196] The above-mentioned driving method of the liquid crystal display device is by dividing the display module 100 into a plurality of mutually independent display areas, and arranging at least one backlight unit 320 corresponding to each display area on the backlight board 300. By calculating the average gray scale values ​​of the red sub-pixel 111, the green sub-pixel 112, and the blue sub-pixel 113 in the gray-scale values ​​corresponding to the original gray-scale data to be displayed in each display area, respectively, the red sub-pixels in each display area are determined. The magnitude of the average grayscale value corresponding to the pixel 111, the green sub-pixel 112, and the blue sub-pixel 113. According to the size relationship of the average grayscale value of the display area, when controlling the display of the decomposed grayscale data set, most of the backlight units 320 of the corresponding color with the grayscale value of 0 are turned off. This setting increases the brightness ratio of the main color, so that the color shift of the large viewing angle main color affected by the low-voltage sub-pixel is improved. Increased the main signal brightness in the case of large viewing angles. At the same time, by increasing the brightness of the backlight to twice the original brightness, the brightness of the overall picture quality display can be maintained, and by increasing the driving frequency to twice the original driving frequency, the speed of the overall picture quality display can be maintained unchanged. In addition, energy saving can be achieved while improving color cast. And there is no need for additional wiring on the LCD panel, etc.

[0197] The invention also provides a display device.

[0198] A liquid crystal display device, such as figure 1 As shown, the liquid crystal display device includes a display module 100, a driving module 200, and a backlight module 300. The display module 100 includes a plurality of pixel units 110 arranged in an array, and the pixel unit 110 includes a red sub-pixel 111, a green sub-pixel 112 and a blue sub-pixel 113. The backlight module 300 includes a power processing unit 310 and a backlight unit 320. Among them, the display module 100 is used to display graphic information. The driving module 200 is used for receiving, processing and outputting driving data to control the normal operation of the display module. The backlight module 300 is used for current processing and lighting the backlight unit 320.

[0199] The driving module 200 includes a grayscale data decomposition processing unit 210. The gray-level data decomposition processing unit 210 is used for decomposing the original gray-level data group to be displayed into a first gray-level data group and a second gray-level data group, respectively, in two consecutive time periods Output the grayscale values ​​corresponding to the first grayscale data set and the second grayscale data set. Wherein, the first grayscale data group is a ternary color mixing grayscale data group, a binary color mixing grayscale data group, or a unit color grayscale data group. The second grayscale data set is a binary mixed color grayscale data set or a unit color grayscale data set.

[0200] The backlight module 300 is provided with a plurality of backlight units 320. The backlight unit 320 includes a red light source, a green light source, and a blue light source. The light source of each color can be individually controlled to turn on or off, and the brightness can be individually controlled.

[0201] In one of the embodiments, the backlight unit 320 provided on the backlight module 300 adopts a plurality of mutually independent LED lamps, and each LED lamp and the color of each LED lamp can be individually controlled to be turned on or off, and the brightness can be individually controlled.

[0202] The display module 100 is divided into at least two independent display areas. The color of each color graphic in a small area is basically the same or does not change much, its main color is the same, and the lowest gray scale is generally the same or most of the same. At this time, the gray scale data is being performed. After decomposition, the decomposition grayscale data set of all or most of the pixel units 110 in the area contains zero grayscale data, and all or most of the zero grayscale data corresponds to the same color. At this time, when the decomposition is displayed In the grayscale data group, the backlight light line with the same color as the 0 grayscale data does not work. It can be turned off to save energy, that is, the backlight unit 320 in a small area can be allocated on demand by the display module area. Realize energy saving.

[0203] The display area corresponds to at least one backlight unit 320, and the backlight units 320 corresponding to different display areas are independent of each other. Since the liquid crystal itself is not an active light-emitting object, but a photoresist switch, each liquid crystal cell must have its corresponding external light source, and the external light source corresponding to each display area should not be turned off without adversely affecting other display areas. Each display area needs to correspond to at least one backlight unit 320, and the backlight units 320 corresponding to different display areas are independent of each other.

[0204] The gray-scale value decomposition processing unit 210 connects all the red sub-pixels 111, green sub-pixels 112, and blue sub-pixels 113 in the display module 100, and is used to decompose the input original gray-scale data corresponding to each pixel unit 110 into two new groups. The gray-scale data of each pixel unit 110, and output the gray-scale values ​​of the red sub-pixel 111, the green sub-pixel 112, and the blue sub-pixel 113 in two consecutive time periods in each pixel unit 110.

[0205] The driving module 200 further includes a driving frequency adjustment unit 220. The driving frequency adjustment unit 220 is used to adjust the driving frequency. The original one grayscale value is decomposed into two grayscale values ​​and displayed in two consecutive time periods, so that the display time of the screen becomes twice the original, that is, the display speed is reduced to half of the original, in order to compensate for the grayscale The display speed reduced by the value decomposition can increase the drive frequency. The way to increase the driving frequency can be the increase of hardware, or the change of software driver, or the simultaneous change of hardware and software program.

[0206] The driving module 210 also includes a backlight adjusting unit 230. The backlight adjustment unit 230 is used to adjust the color and brightness of the backlight unit 320. In order to turn off the backlight unit 320 corresponding to the 0 grayscale value and realize the energy-saving effect of the present invention, the present invention uses a plurality of mutually independent backlight units 320 as the source of the backlight unit 320, and the three color lamps of each backlight unit 320 are also independent Controlled, the switch of each color lamp in each backlight unit 320 can be adjusted independently. In addition, because the grayscale value decomposition process is to decompose the original high grayscale value into two new low grayscale values, that is, in practice, a set of high voltage signals is decomposed into two sets of low voltage signals, so the brightness Will decrease. In order to compensate for the brightness reduction due to the grayscale value decomposition, the backlight brightness corresponding to the non-zero grayscale value can be increased, that is, the backlight intensity is increased, to compensate for the brightness decreased due to the grayscale value decomposition. The way to increase the brightness of the backlight unit 320 may be a change of hardware and/or a change of a software driver.

[0207] A liquid crystal display device, by dividing a display module into a plurality of mutually independent display areas, and at least one backlight unit 320 corresponding to each display area is provided on a backlight panel. By turning off all or most of the color lights corresponding to 0 grayscale data in a certain display, energy saving can be achieved. At the same time, by changing the driving frequency of the driving module and the backlight brightness of the backlight module, the display device can be suitable for the display of decomposed data, while improving the large-view role, without reducing the original visual effect of the picture.

[0208] Any of the above-mentioned "backlight units 320" can independently and individually control the light-emitting conditions and the on and off conditions of the red, green and blue light sources. For example, the "light emitting unit" of the present disclosure can individually adjust the brightness, turn on and turn off of any one of red, green, and blue light. You can also control the brightness, mixing ratio, on and off of any two and three colors of red, green, and blue light.

[0209] In some embodiments, the backlight unit 320 may be any light-emitting unit capable of separately emitting red, green and blue light, which is not limited herein. For example, the light emitting unit in the present disclosure may be the backlight unit 320.

[0210] The technical features of the above embodiments can be combined arbitrarily. In order to make the description concise, all possible combinations of the technical features in the above embodiments are not described. However, as long as there is no contradiction in the combination of these technical features, they should It is considered as the range described in this specification.

[0211] The above examples only express a few implementation modes of the present invention, and the description is relatively specific and detailed, but it should not be understood as a limitation on the scope of the invention patent. It should be pointed out that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can be made, and these all fall within the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention should be subject to the appended claims.