TWI421828B - Plane display and display data controlling method of plane display - Google Patents

Description

Display data control method for flat panel display and flat panel display

The present invention relates to a method for adjusting the polarity of display materials, and more particularly to a method for adjusting display data of a flat panel display and a flat panel display.

With the development of technology, flat panel displays (for example, liquid crystal displays) are widely used in mobile phones, notebook computers, and desktop displays due to their high image quality, small size, light weight, and wide application range. Among various consumer electronic products such as devices and televisions, conventional cathode ray tube display devices have been gradually replaced as the mainstream of display devices.

The display unit in a flat panel display is generally called a pixel, and in order to make the flat panel display have better display quality, many flat panel displays adopt a dot inversion or a two-line inversion. To process the display data provided to each pixel. The so-called dot inversion means that the polarity of any pixel charging is opposite to that of other pixels around it, and the two-line inversion is a unit of polarity inversion of two display line data. However, data processing using dot inversion or two-line inversion can improve display quality, but it increases the amount of energy required for display. Therefore, the researchers developed another adaptive column inversion display data processing method.

In the adaptive column inversion technique, two display data processing methods of dot inversion (or two-line inversion) and column inversion (Column Inversion) are simultaneously adopted. Wherein, when the display data is an intermediate gray scale (for example, a gray scale value of 4 to 59 in the gray scale of 64 gray scale), the technique provides display data by means of dot inversion or two-line inversion. Maintain a fixed display quality; relatively, when the display data is the edge grayscale (for example, the grayscale value of 0 to 3 in the 64 grayscale and the grayscale of 60 to 63), the technique is to reverse the column. To provide information to reduce energy consumption.

However, although the adaptive bar inversion technique has the above advantages, when using the Frame Rate Control (FRC) technology to simulate higher color resolution, the adaptive bar inversion technique is used to provide display data for the screen. The displayed flat display will have vertical lines and rolling cross lines on the screen to destroy the uniformity of the overall picture.

The object of the present invention is to provide a display data control method for a flat panel display and a flat panel display, which can reduce the texture generated when the adaptive column inversion technique is matched with the frame number control technology.

The invention provides a display data control method for a flat panel display, which is suitable for determining the polarity when the display data is output. The display data control method is to first receive the first display line data including the first pixel data displayed on the first pixel, and then determine the second information according to the relationship between the first pixel data and the preset range. Whether the polarity of the second pixel data displayed on the second pixel in the line data is output is the same as the first pixel data. When it is determined that the polarity of the first pixel data and the second pixel data are the same, the specific one of the subsequent pixel data of each subsequent display line data that is successively received is fixed for a predetermined length of time. The polarity of the time is the same as the polarity when the first pixel data is output. Wherein, the subsequent pixels for displaying the subsequent pixel data, the second pixel and the first pixel receive the pixel data from the same path.

In an embodiment of the present invention, the display data control method is further fixed for each of the predetermined time lengths when determining the polarity of the first pixel data and the second pixel data being outputted. The polarity of the specific one of the subsequent pixel data in the subsequent display line data is the same as the polarity when the first pixel data is output; and the polarity is different when it is determined that the first pixel data and the second pixel data are output. When receiving the subsequent display line data, the first pixel data is replaced by the second pixel data and the determination process between the foregoing and the preset range is performed, thereby determining whether the polarity of the subsequent pixel data is output and the second The pixel data is the same.

In another embodiment of the present invention, if it is determined that the grayscale value of the first pixel data falls within the foregoing preset range, determining the polarity of the second pixel data to be output and the first pixel When the data is output, the polarity is different; relatively, if it is determined that the grayscale value of the first pixel data falls outside the preset range, then the polarity of the second pixel data is output and the first painting is determined. The polarity of the prime data is the same when it is output.

In another embodiment of the present invention, when the grayscale value of the pixel data falls between 0 and 63, the aforementioned preset range is set between 4 and 59.

The invention also proposes a flat panel display adapted to determine the polarity of the display material as it is output. The flat panel display includes a display area, a plurality of pixel control lines, a plurality of data supply lines, and a control unit. The display area has a plurality of pixels, and the pixels are used to receive the display data and display corresponding images according to the pixels; each of the pixel control lines is electrically coupled to a part of the pixels to control the electrically coupled portion. Whether the pixels receive the display data; each data supply line is electrically coupled to the partial pixels to provide display data to the partially coupled pixels; the control unit receives the plurality of display line data, and the display The line data is sequentially supplied to the aforementioned data supply line, and thus a pixel of the pixel control line electrically coupled to receive a display line data. In addition, the control unit then receives the second display line data immediately after receiving the first display line data, and then receives other subsequent display line data. The first display line data has a first pixel data, the second display line data has a second pixel data, and each subsequent display line data has a subsequent pixel data, and the first pixel The data, the second pixel data and the subsequent pixel data are provided to the same data supply line. The control unit determines the polarity of the second pixel data when it is output according to the relationship between the first pixel data and a certain preset range, and if the control unit determines that the first pixel data and the second pixel data are output If the polarities are the same, the polarity of the subsequent pixel data in each subsequent display line data that is successively received is fixed for the same time as the first pixel data is outputted.

In an embodiment of the invention, the control unit has a register, and the control unit determines how to set the register according to the relationship between the grayscale value of the first pixel data and the preset range. Alternatively, in an embodiment, if the grayscale value of the first pixel data falls within the foregoing preset range, the control unit sets the register to be the first preset value; conversely, if the first pixel data The gray level falls outside the preset range, and the control unit sets the register to the second preset value. In addition, in an embodiment of the present invention, when the register is the second preset value, the control unit stops determining the relationship between the grayscale value of the first pixel data and the preset range, and the slave register After being set to a predetermined length of time starting from the second preset value, the control unit resets the register to the aforementioned first preset value.

Since the invention can control the manner in which the data is provided, the polarity of the data supply can be adjusted under the possible arrangement of the displayed data, and the image instability caused by the change of the data polarity is reduced.

The above and other objects, features and advantages of the present invention will become more <RTIgt;

In order to solve the higher color resolution when the Adaptive Column Inversion technology is combined with the Frame Rate Control (FRC) technology, the flat display will have vertical lines and rolling horizontal lines on the screen. The technicians conducted experiments and analysis to destroy the uniformity of the overall picture. According to the results of the experiment, it was found that these lines were caused by irregular interlacing of bright and dark lines. However, the irregular interlacing of these bright and dark lines does not appear on all image data, but only on the image data of a specific gray level. According to the 256-gray image data and the 2-bit frame number control technology, when the image data with grayscale values between 16 and 18 or grayscale values of 241 to 243 appears, the displayed image appears. The above-mentioned texture will be generated; in contrast, other grayscale image data will not be generated when displayed. It is inferred that if the problem of the image data of a specific gray scale is solved, it is possible to obtain a stable image display quality.

Similarly, a 2-bit frame number control technique is used to simulate 256 grayscale image data. The grayscale value of each frame of image data ranges from 0 to 63, and the brightness accumulated by four frames is used to provide one. The actual brightness of the image. In order to achieve the effect that the accumulated brightness becomes the actual brightness, the control method adopted in the prior art is as shown in FIG. Please refer to FIG. 1 , which is a flow chart of the implementation steps of the currently used data polarity control method. In FIG. 1, first, a display line data is received in step S100, and the grayscale value of each pixel data in the line data is determined to confirm the pixel data. Whether the grayscale value falls within a certain range (step S102). If the grayscale value of the pixel data falls within the specific range, setting the polarity of the pixel data supplied to the same data supply line to be the same as the polarity of the current pixel data (step S106); If the grayscale value of the pixel data does not fall within the specific range, the polarity of the pixel data supplied to the same data supply line is set to be different from the polarity of the current pixel data (step S104). After judging a pixel data, it is necessary to confirm whether the entire display line data has been judged (step S108); if all the judgments have been completed, the next display line data is received (return to step S100), otherwise, return to Step S102 is to determine the relationship between the next pixel data and the specific range.

However, this method causes the flat display to produce a bright and dark line display result when the polarity is constantly changing, and thus the display quality is deteriorated by the appearance of vertical lines and rolling cross lines on the display screen to destroy the uniformity of the overall picture. . Accordingly, the present invention proposes the following techniques to be improved.

Please refer to FIG. 2, which is a circuit block diagram of a flat panel display according to an embodiment of the invention. In the present embodiment, the flat panel display 20 has a display area 200, a control unit 210, a plurality of pixel control lines 220-226, and a plurality of data supply lines 230-238. The display area 200 has a plurality of pixels 240 to 278. The pixels 240 to 278 receive pixel data from one of the data supply lines 230 to 238 by the control of the pixel control lines 220 to 226, respectively. This shows the corresponding image. Each of the pixel control lines 220-226 is electrically coupled to one of the pixels to control whether the partially coupled pixels receive the display data; similarly, each data supply line 230~238 They are also electrically coupled to a portion of the pixels to provide pixel data to the partially coupled pixels. As shown, the pixel control line 220 is electrically coupled to the pixels 240, 242, 244, 246, and 248. The pixel control line 222 is electrically coupled to the pixels 250, 252, 254, 256, and 258. The control line 226 is electrically coupled to the pixels 270, 272, 274, 276, and 278; the data supply line 230 is electrically coupled to the pixels 240, 250, and 270, and the data supply line 232 is electrically coupled to the pixels. 242, 252 and 272, the data supply line 234 is electrically coupled to the pixels 244, 254 and 274, the data supply line 236 is electrically coupled to the pixels 246, 256 and 276, and the data supply line 238 is electrically coupled to the picture. 248, 258 and 278.

In this embodiment, all of the display line data is first transmitted to the control unit 210. After receiving the display line data, the control unit 210 sequentially supplies the display line data to the data supply lines 230-238, and receives the pixels electrically coupled to the same pixel control line 220-226. The same display shows the pixel data contained in the line data. If the display line data is named in the order received by the control unit 210, the control unit 210 will sequentially receive the display line data of the first display line data, the second display line data, the third display line data, and the like. The first display line data is provided to the data supply lines 230-238, so that the pixels 240-248 electrically coupled to the pixel control line 220 can respectively receive one pixel in the first display line data. Next, the second display line data is also provided to the data supply lines 230-238, but at this time different paintings are made by enabling different pixel control lines (for example, pixel control lines 222 or 226). The prime (relative pixel 250~258 or 270~278) can receive one pixel data in the second display line data.

Since the phenomenon of bright and dark lines is the result of the constant conversion of the polarity of the pixel data provided by the same data supply line, the following will discuss a specific data supply line. Those skilled in the art are aware that such discussions can also be applied to pixels that are electrically coupled to other data supply lines.

It is assumed that the aforementioned first display line data includes a pixel data (hereinafter referred to as first pixel data) for displaying on the pixel 242, and the aforementioned second display line data includes one for displaying on the pixel 252. The pixel data (hereinafter referred to as the second pixel data), then the control unit 210 determines the polarity of the second pixel data to be output according to the relationship between the first pixel data and a certain preset range. And if the control unit 210 determines that the polarity of the first pixel data and the second pixel data are the same, the control unit 210 fixes each subsequent display line data that is successively received for a predetermined length of time (for example, the foregoing Subsequent pixel data displayed on subsequent pixels (eg, pixels 272) electrically coupled to the same data supply line 232 in the third display line data) are outputted with the first pixel data when outputted Same polarity.

In order to more clearly illustrate the technical content provided by the present invention, please refer to the content shown in FIG. FIG. 3 is a flow chart showing the steps of executing the display data control method according to an embodiment of the invention. As shown in FIGS. 2 and 3, the control unit 210 first receives the first display line data (step S300), and then determines the polarity of each pixel. First, the control unit 210 first determines whether the pixel material to be processed currently has been set to be the same polarity as a certain pixel material (step S310). If there is no such setting result before, the control unit 210 determines whether the grayscale value of the pixel data falls within a certain range for the currently processed pixel data (step S302). According to the above example, if the image data of 256 gray scales is simulated by the 2-bit frame number control technology, the grayscale value range of the image data of each frame will be 0~63, and the specific range here is Between 4 and 59. In other words, in this embodiment, the control unit 210 determines whether the grayscale value of the current pixel data falls between 4 and 59, and determines the polarity of the other pixel output according to the result of the determination.

Assuming that it is determined in step S302 that the pixel data does not fall between 4 and 59, the control unit 210 sets the next pixel data and the current pixel data supplied to the same data supply line as Different polarities (step S304). For example, once it is determined that the gray scale value of the first pixel data is 0~3 or 60~63 (not falling between 4~59), the control unit 210 provides the next data to the data. The polarity of the second pixel data of the supply line 232 is set to be different from the polarity of the first pixel data. Or, similarly, once it is judged that the gray scale value of the second pixel data is 0 to 3 or 60 to 63, the control unit 210 will display the next pixel data supplied to the data supply line 232 (also The output polarity of the pixel data supplied to the data supply line 232 in the third display line data is set to be different from the output polarity of the second pixel data.

Conversely, if it is determined in step S302 that the grayscale value of the one pixel data falls between a specific range (for example, between 4 and 59), the control unit 210 provides the next one to the same The pixel data on the data supply line is set to the same polarity as the current pixel data (step S306). For example, once it is determined that the grayscale value of the first pixel data is between 4 and 59, the control unit 210 sets the polarity of the second pixel data provided to the data supply line 232. The polarity is the same as the first pixel data. Or, similarly, once it is determined that the gray scale value of the second pixel data is between 4 and 59, the control unit 210 will display the next pixel data supplied to the data supply line 232 (that is, the first The output polarity of the pixel data supplied to the data supply line 232 in the three display line data is set to be the same as the output polarity of the second pixel data.

After the setting of step S304 or S306 is passed, the control unit 210 determines whether all the pixel data in the display line material currently being prepared (or being) output has been judged (step S308). If all the pixel data have not been judged, the process will return to step S310 and start to judge and correspond to the next pixel data; in contrast, if the pixel data in the line data has been When it is judged and set, the control unit 210 will receive the next display line data (step S300) and perform the necessary determination. It should be noted that, in this embodiment, although the next display line data is received after all the pixel data are judged, the actual judgment and setting operation can be performed simultaneously with the receiving operation of the next display line data. Or you can even start receiving the next display line data before making the judgment and corresponding setting of the current display line data.

Going back to step S310, if it is found in step S310 that the pixel data is set to be the same polarity as the previous pixel data, the control unit 210 further determines the time interval from the fixed polarity to the present time. Whether or not the predetermined length of time has passed (step S312). If the predetermined length of time has elapsed, the control unit 210 restarts the determination between the grayscale value of the current pixel data and the preset range (step S302); conversely, if it is still within the predetermined length of time Then, the control unit 210 directly sets the output polarity of the next pixel data supplied to the same data supply line to be the same as the output polarity of the current pixel data. Obviously, if the fixed polarity of this time is from the first pixel data, then the output polarity set here will be the same as the output polarity of the first pixel data.

It should be noted that the so-called predetermined length of time here can be of many types. For example, a fixed length of time may be directly used as a predetermined length of time, or a time for receiving and setting a fixed number (such as three) of display line data may be set as a predetermined length of time, or may be displayed. A fixed number (such as three) of display line data is taken as a predetermined length of time.

According to the above steps, once the output polarity of one pixel material (for example, the second pixel data) is set to be the same as the output polarity of another pixel material (for example, the first pixel data), then the subsequent length of time is predetermined. The output polarity of the pixel data processed in the same data supply line processed by the same is also set to be the same as the output polarity of the first pixel data; or, from another point of view, the subsequent is predetermined The pixel data processed within the length of time supplied to the same data supply line will maintain the same output polarity as the first pixel data.

Furthermore, in addition to controlling whether the pixel polarity is changed in a software manner, it is also possible to control the transition of the pixel polarity by using a hardware method. As shown in FIG. 2, the control unit 210 further includes a register 212, and the register 212 can be set to at least two different values. When the control unit 210 performs the setting of step S304, the register 212 is set to the first value (hereinafter referred to as the first preset value); in contrast, when the control unit 210 performs the setting of step S306, temporarily The memory 212 will be set to the second value (hereinafter referred to as the second preset value).

It should be noted that since the present invention is to set the polarity conversion of two pixel data supplied to the same data supply line 230-238 before and after, the register 212 should preferably have the ability to indicate that it is provided. The ability to convert the polarity of pixel data to a specific data supply line. For example, the register 212 can have a plurality of bits, and each bit corresponds to one of the data supply lines, and the values 0 and 1 represent different polarity switching settings; or, the register 212 can have many Bits, and the values represented by these bits are combined by the polarity switching setting states of all data supply lines; or, the register 212 can have only one bit, and each data supply line is processed. When the polarity switch is set, the associated value is stored in additional memory or read from the additional memory to the scratchpad 212 for use.

According to the foregoing hardware architecture, the control unit 210 can easily determine whether the currently processed pixel data needs to be converted according to the content of the register 212, and the control unit 210 can also easily change the register. The polarity switching state set is changed by the content of 212. For example, the control unit 210 may set the register 212 to the first preset value when the grayscale value of the first pixel data falls within the preset range, and drop the gray scale of the first pixel data. The register 212 is set to the second preset value when outside the preset range. When the register 212 is at the second preset value, the control unit 210 stops determining the relationship between the grayscale value of the corresponding pixel data and the preset range, and is set from the register 212 to the second preset. The value of the register 212 is not changed within a predetermined length of time after the start of the value, and the register 212 is reset to the first preset value or other non-second preset value after the predetermined length of time is exceeded. The control unit 210 starts the related determination and setting operation again.

In summary, the present invention can control the manner in which data is provided, so that the polarity of the data supply can be adjusted under the possible arrangement of the displayed data, and the image instability caused by the variation of the data polarity can be reduced.

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.

20. . . monitor

200. . . Display area

210. . . control unit

212. . . Register

220~226. . . Pixel control line

230~238. . . Data supply line

240~278. . . Pixel

S100~S180. . . Current implementation steps of the technology

S300~S312. . . Implementation steps of an embodiment of the present invention

FIG. 1 is a flow chart showing the steps of the current data polarity control method.

2 is a circuit block diagram of a flat panel display in accordance with an embodiment of the present invention.

FIG. 3 is a flow chart showing the steps of executing the display data control method according to an embodiment of the invention.

S300~S312. . . Implementation steps of an embodiment of the present invention

Claims (9)

A display data control method for a flat panel display is adapted to determine a polarity when a display material is outputted, comprising the steps of: a. receiving a first display line data, wherein the first display line data comprises a first display element displayed on a first pixel a first pixel data; b. determining, according to the relationship between the first pixel data and a predetermined range, a second pixel data displayed on a second pixel in a second display line data is Whether the polarity at the time of output is the same as the polarity when the first pixel data is output; and c. if it is determined that the polarity of the first pixel data and the second pixel data are the same, for a predetermined length of time Internally, the polarity of a subsequent pixel data displayed on a subsequent pixel in each subsequent display line data that is successively received is the same as the polarity when the first pixel data is output, wherein The subsequent pixel, the second pixel and the first pixel receive pixel data from the same path. The method for controlling display data of a flat panel display according to claim 1, further comprising the steps of: d. receiving a difference in polarity when the first pixel data and the second pixel data are outputted, When the line material is subsequently displayed, the first pixel data is replaced by the second pixel data and step b is performed, thereby determining whether the polarity of the subsequent pixel data is output is the same as the second pixel data. The method for controlling display data of a flat panel display according to claim 1, wherein the step b comprises: if the grayscale value of the first pixel data falls within the preset range, determining to make the second pixel The polarity when the data is output is the same as the polarity when the first pixel data is output; and if the grayscale value of the first pixel data falls outside the preset range, then the decision is made The polarity when the second pixel data is output is different from the polarity when the first pixel data is output. The method for controlling display data of a flat panel display according to claim 1, wherein the preset range is between 4 and 59, and the gray scale values of the display line data are between 0 and 63. The display data control method of the flat panel display according to claim 1, wherein the step c further comprises: performing step b on the display line data received after the predetermined length of time, thereby determining when the display data is output. polarity. A flat panel display is adapted to determine a polarity when a display material is outputted, comprising: a display area comprising a plurality of pixels, the pixels receiving display data and displaying corresponding images according to the plurality of pixels; and a plurality of pixel control lines, respectively Electrically coupled to the plurality of pixels to control whether the pixels are electrically coupled to receive the display data; the plurality of data supply lines are electrically coupled to the plurality of pixels to provide Displaying the data to the electrically coupled portion of the pixels; and a control unit receiving the plurality of display line data, the display line data being sequentially provided to the data supply lines to enable the pixel control One of the lines controls the electrically coupled portion of the pixels to receive one of the display line data, and the control unit is based on a first pixel data and a pre-selection in a first display line data currently received. Setting a relationship between the ranges, determining a polarity of a second pixel data in a second display line data received after the first display line data is output, and if the control unit determines the first pixel Data and the second pixel data are lost When the polarity of the time is the same, the polarity of a subsequent pixel data in each subsequent display line data that is successively received is fixed for a predetermined time length, and the polarity of the first pixel data is output when the first pixel data is output. The first pixel data, the second pixel data, and the subsequent pixel data are provided to the same data supply line. The flat panel display of claim 6, wherein the control unit comprises a register, the control unit determines a relationship according to a relationship between a grayscale value of the first pixel data and the preset range. Register. The flat panel display of claim 7, wherein if the grayscale value of the first pixel data falls within the preset range, the control unit sets the register to a first preset value; If the gray level of the first pixel data falls outside the preset range, the control unit sets the register to a second preset value. The flat panel display of claim 8, wherein when the register is the second preset value, the control unit stops determining the grayscale value of the first pixel data and the preset range. Relationship, and resetting the register after the predetermined length of time from the register being set to the second preset value.