TW201349219A - Pixel display drive system and sub-pixel display drive process - Google Patents

Abstract

This invention discloses a sub-pixel display drive system, comprising: an image input unit, a image difference calculation unit, a selection unit, a judging unit, an image interpolation unit, and an image output unit. By using the sub-pixel display drive system and process of this invention, every sub-pixel can be efficiently used as an independent pixel to triple the resolution, and the display becomes smoother and clearer, which can efficiently enhance the display resolution.

Description

Display pixel driving system and display sub-pixel driving process

The present invention relates to a display pixel driving system and a display sub-pixel driving process, and more particularly to a display pixel driving system and a display sub-pixel driving process using independent sub-pixels as display pixels.

With the development of human technology, mobile phones, TVs, desktop computers, notebook computers, etc. are all in the category of display devices, and important components in display devices are displays, so how to make the display The related researches that show lighter or more suitable for human eyes and have better visual effects have been in existence for a long time, but this topic has always occupied a large part of relevant research and development content.

Among them, the monochrome display for medical use focuses on displaying image sharpness and resolution, while the display with mammography always has high requirements for resolution. At present, the five-megapixel display is barely in line with the needs of mammography, but in order to pursue better image quality and diagnostic quality, it is hoped that there will be further improvement in image resolution.

The implementation of the prior art is to display the same gray scale for each sub-pixel LCR (where: L is for left-left; C is for medium-center; and R is for right-right) in a monochrome display. value. The sub-pixel driving method can be roughly divided into: directly multiplying the three sub-pixels of the LCR by different parameters, but this method may cause brightness degradation; or another common practice is to pre-process the LCR sub-pixels with computer software. Then output to the display, but this method needs to be matched with a specific software, which is inconvenient in practical use.

And referring to the prior art US20080079755A1, this prior art mentions that one pixel is composed of four sub-pixels, including R (red) G (green) B (blue) W (white) four sub-pixels (or other four) Kind of sub-pixel), in which a way of driving sub-pixels is proposed, mainly based on sub-pixels The value adjacent to the pixel is fused by a nearby sub-pixel according to a certain ratio to generate a new sub-pixel. It can also be said that the image is interpolated to make the image flatter.

The invention defines a threshold value based on the previous related processing technology, and uses the original picture data for subsequent judgment, according to the determined data to map different interpolation modes, and further interpolates the individual sub-pixels. Each sub-pixel is used as an independent pixel, and has the function of independently outputting gray scales, so that the display screen is smoother and clearer, so as to achieve an ultra-high resolution effect.

In order to solve the above mentioned problems, one main object of the present invention is to provide a pixel driving system for a display, comprising: an image input unit, an image gray scale difference calculating unit, a selecting unit, and a determining unit. An image interpolation unit and an image output unit are processed by judging the data of the original picture, and then performing corresponding different interpolation methods according to the determined data, and obtaining each sub-pixel after interpolation The grayscale value should be displayed, and each sub-pixel is used as an independent pixel to increase the resolution by three times, so that the display screen is smoother and clearer, so as to improve the resolution.

Another main object of the present invention is to provide a display sub-pixel driving method, which comprises the steps of: determining a grayscale value of a pixel display by using a monochrome image signal source input, and determining any of the same sub-pixel gray of any two adjacent pixels. The difference value between the order values is compared with the threshold value to determine which threshold interval to fall into, and each sub-pixel is used as an independent display pixel, and an appropriate interpolation method is selected to independently output the gray scale value, which can be improved. The power of resolution.

According to the above objective, the present invention first provides a pixel driving system for a display, comprising: an image input unit for inputting image signals formed by a plurality of pixels, and each pixel includes a plurality of sub-pixels and an image gray scale The difference calculation unit selects any one of the two adjacent pixels of the plurality of pixels to perform gray scale difference calculation to form a gray scale difference value and a selection unit to provide a variable K value, and each will be based on the K value The grayscale value of each pixel is divided into threshold intervals formed by K threshold values, wherein each threshold interval corresponds to a set interpolation equation and a judgment unit, and the grayscale difference value is determined to be located in the threshold interval, and is selected. The interpolation equation corresponding to the threshold interval and an image interpolation unit are calculated according to the interpolation equation corresponding to the threshold interval selected by the determination unit, to obtain a new grayscale value of the remaining sub-pixels, and an image. An output unit for outputting new grayscale values.

The present invention further provides a display sub-pixel driving method, the method comprising: providing an image input unit for inputting image signals formed by a plurality of pixels, and each pixel includes a plurality of sub-pixels, and providing an image gray-scale difference calculation a unit that selects any one of the two adjacent pixels of the plurality of pixels to perform gray scale difference calculation to obtain a gray scale difference value, and provides a selection unit for providing a variable K Value, and according to the K value, the gray scale value of each pixel is divided into threshold intervals formed by K threshold values, wherein each threshold interval corresponds to a set interpolation equation, and a judgment unit is provided, and the gray scale difference value is determined. Located in the threshold interval, and selecting the interpolation equation corresponding to the threshold interval, providing an image interpolation unit, which is calculated according to the interpolation equation corresponding to the threshold interval selected by the determination unit, to obtain the remaining sub-pixels. A new grayscale value and an image output unit for outputting new grayscale values.

According to the pixel driving system and the display sub-pixel driving method of the display provided by the present invention, after the data from the original picture is judged, the corresponding interpolation equations are made according to the determined data, and each sub-interpolation is used after interpolation. Pixels are used as independent pixels to output gray scales independently, which can make the display screen smoother and clearer, so as to improve the resolution without reducing the contrast.

The present invention mainly discloses a pixel driving system and a display sub-pixel driving method for a display, wherein the pixel driving system of the display and the display sub-pixel driving method are basically The structure and function are well known to those skilled in the relevant art, and therefore, the description of the pixel driving system and the display sub-pixel driving method of the display of the present invention will be described in detail below. At the same time, the drawings referred to in the following text are indicative of the structure related to the features of the present invention, and therefore are not drawn according to actual dimensions, and are described first.

First, please refer to FIG. 1 , which is a schematic diagram of a pixel driving system of a display of the present invention, including: an image input unit 10 for inputting image signals formed by a plurality of pixels, where the image signal refers to a monochrome image signal. And each pixel includes a plurality of sub-pixels, which may be any one of L, C, and R (where: L is a left-left; C is a medium-center; and R is a right-right); The image gray-difference value calculation unit 20 selects any one of the two adjacent pixels of the plurality of pixels to perform gray-scale difference calculation to form a gray-scale difference value and a selection unit 30. To provide a variable K value, the K value is used to divide each pixel grayscale value into K threshold values, which can form (K+1) threshold intervals, and the K threshold value is determined as [ (1 ^* 2^N/K)-M ₁ ], [(2 ^* 2^N/K)-M ₂ ], [(3 ^* 2^N/K)-M ₃ ], ..., [(K -1) ^* 2^N/K)-M _K-1 ], where K is any natural number, N is the N bits of the image signal grayscale value, and M ₁ , M ₂ , ......, M _K-1 is an adjustment The number and a determining unit 40 determine that the grayscale difference value is located in the threshold interval, and select the interpolation equation corresponding to the threshold interval, and an image interpolation unit 50, corresponding to the threshold interval selected by the determining unit 40. The interpolation equation is calculated to obtain a new grayscale value of the remaining sub-pixels, and an image output unit 60 for outputting the new grayscale value.

Here, the important parameters K, N, and M in the calculation formula of the technical feature threshold of the present invention are respectively described as follows, and the N value description portion is as follows: if the maximum display gray value of the panel is 255, according to the The calculation formula (2 ^Nbit ) can be pushed back to obtain an N value of 8 bits, where the value of N in the calculation formula of K threshold values is taken as 8; if the maximum gray scale value of the panel is 1023, it is also based on The calculation formula (2 ^Nbit ) can be pushed back to obtain an N value of 10 ^bits , where the value of N in the calculation formula of K threshold values is brought into 10, that is, the value of N is the maximum gray scale value of the panel. By extension, the value of N is not limited here.

Next, the K value portion is selected. The K value provided by the selection unit 30 can be divided into K threshold values for each pixel and form (K+1) threshold intervals, wherein each threshold interval corresponds to one Set the interpolation equation, where the interpolation equation is S ( x _i )= a ₁ x _i + a ₂ x _j , and a ₁ and a ₂ are interpolation coefficients, 0≦ a ₁ + a ₂ ≦1, x _i And x _j is the gray scale value of the same sub-pixel of any one of the adjacent pixels, and the calculated S ( x _i ) value is calculated as a new gray scale value; finally, the adjustment parameter M value portion is adjusted, wherein the parameter is adjusted The M range is -(1 ^* 2^N)/K≦M ₁ , M ₂ , ..., M _K-1 ≦(1 ^* 2^N)/K, and M ₁ , M ₂ , ..., M _K-1 can be a different value, and K can be any natural number.

The threshold value portion of the present invention can be further described in detail by assuming that the panel is an 8-bit system, that is, the gray scale interval is 0 to 255. If it is divided into four threshold intervals, three threshold values are required, in this example. The adjustment parameter M value can be any natural number from -64 to 64. If M ₁ = M ₂ = M ₃ =1 is selected, the threshold value can be calculated as 63, 127, 195, and the original display The gray-scale interval determines that the gray-scale left and right boundary values are 0~255, that is, under the condition of N=8, K=4, M ₁ =M ₂ =M ₃ =1, the gray-scale value can be distinguished as 0, 63. Four segments of 127, 195, and 255. At this time, if the image grayscale difference calculating unit 20 performs grayscale difference value calculation for any one of the two adjacent pixels of the plurality of pixels, 57, if it falls into the section of 0~63, the interpolation coefficients a ₁ and a ₂ corresponding to the section are brought into the interpolation equation, wherein the interpolation equation is S ( x _i )= a ₁ x _i + a ₂ x _j , the interpolation coefficients a ₁ and a _{2 are in} accordance with the condition of 0≦a ₁ +a ₂ ≦1, and x _i and x _j are gray scales of the same sub-pixel of any of the adjacent pixels Value, calculated to find S ( x _i ) the value is a new grayscale value; another example is as follows: if the image grayscale difference calculation unit 20 performs grayscale difference values for any two of the plurality of pixels, the same subpixel If the calculation result is 70, if it falls within the segment of 63~127, the different interpolation coefficients a ₁ and a ₂ corresponding to this segment are brought into the interpolation equation, and the calculation can be used to obtain S ( The value of x _i ) gives a new grayscale value. Therefore, it can be known that when the K value is initially determined, the number of thresholds is determined, and the number of thresholds is also determined. After the adjustment parameter M is determined, the exact threshold value can be obtained, and the gray scale of the image can be obtained. The calculation result of the gray scale difference value obtained by the difference calculating unit 20 is brought in, which one can enter the threshold interval, and then the corresponding interpolation coefficients a ₁ , a ₂ and interpolation are used in the threshold interval. The equation, where the interpolation equation can be a linear or nonlinear equation, can be obtained by interpolation equations to obtain a new gray scale value S ( x _i ) and output through an image output unit 60.

2 is a schematic diagram of processing results of a preferred embodiment of a pixel driving system for a display of the present invention. This figure may represent another technical feature of the present invention, in that each pixel 101 of the present invention includes a plurality of sub-pixels 103, which are L, C, and R (where: L is a left-left; C is a medium-center; R is the right-right three sub-pixels 103 as the minimum display unit, so the resolution can be effectively increased by three times, and the effect of not reducing the contrast can be achieved; when the initial image signal is input, the L, C, R (where: L is a left-left; C is a medium-center; and R is a right-right), and any one of the sub-pixels 103 retains the display value of the initial image signal, and the remaining two sub-pixels 103 further The processing is exemplified as follows: the left frame of the left figure of FIG. 2 is composed of three sub-pixels 103 of L ₃ , C ₃ , and R ₃ , and the part of the middle frame is composed of three sub-pixels 103 of L ₁ , C ₁ , and R ₁ . The portion of the frame is composed of three sub-pixels 103 of L ₂ , C ₂ , and R ₂ ; the portion of the left frame of the right diagram of FIG. 2 is composed of three sub-pixels 103 of L ₃ ^' , C ₃ ^' , and R ₃ ^' , and the portion of the middle frame is composed of L ₁ ^' , C ₁ ^' , R ₁ ^' three sub-pixels 103, the right border is made up of three L ₂ ^' The C ₂ ^' , R ₂ ^' sub-pixel 103 is composed; the left picture of FIG. 2 is the value displayed by the pixel 101 after inputting the image signal of the original picture, and the gray level value of the display is L ₁ in the left picture. =C ₁ =R ₁ =250, L ₂ =C ₂ =R ₂ =190, and the right graph of Fig. 2 shows the result obtained by the operation of the proposed method of the present invention, which is explained as follows: It is assumed that the initial image signal controls the C sub- The display value of the pixel 103, that is, C ₁ = C ₁ ^' , C ₂ = C ₂ ^' , if the initial C ₁ = 250, C ₂ = 190, the phase difference is judged to be C ₁ - C ₂ = 60, and falls into N = 8, K=4, 0~63 section under M=1 condition, the interpolation coefficient a ₁ =0.55, a ₂ =0.45 of the first section is selected, and R ₁ ^' = a ₁ can be obtained according to the interpolation formula. ×C ₁ + a ₂ ×C ₂ =0.55×250+0.45×190=223, and L ₂ ^' = a ₂ × C ₁ + a ₁ × C ₂ = 0.45 × 250 + 0.55 × 190 = 217 can also be obtained. At this time, the results of C ₁ ^' , R ₁ ^' , L ₂ ^' , and C ₂ ^' after the operation of the present invention can be seen to show a smooth trend, which can effectively increase the resolution; another example is as follows: Assume that the initial image signal system controls L. value of the sub-pixels 103, i.e. ^{_{L 1 = L 1 ', L}} 2 = L 2', if the initial _{L 1 = 250, L 2 =} 190, And set its apparent difference value L ₁ -L ₂ = 60, 0 to 63 sections fall under the N = 8, K = 4, M = 1 condition, selecting a first section of the interpolation coefficients a ₁ = 0.55, a ₂ = 0.45, according to the interpolation formula, C ₁ = a ₁ × L ₁ + a ₂ × L ₂ = 0.55 × 250 + 0.45 × 190 = 223; R ₁ ^' = a ₂ × L ₁ + can also be obtained a ₁ × L ₂ = 0.45 × 250 + 0.55 × 190 = 217. At this time, the results of L ₁ ^' , C ₁ ^' , R ₁ ^' , and L ₂ ^' after the operation of the present invention also exhibit a smooth tendency, which can effectively increase the resolution. That is, in the present invention, in the adjacent pixel 101, LCR (i.e., L is a left-left; C is a medium-center; and R is a right-right) is selected to control the grayscale value of the sub-pixel 103. After calculating the grayscale difference value, the grayscale values of the remaining two subpixels 103 are obtained in the above manner. For the description of not reducing the contrast of the image, the description of FIG. 2 can also be proved as follows: When L ₃ = C ₃ = R ₃ = 50 in the left frame of the left diagram of FIG. 2, it is assumed that the initial image signal controls the C sub-pixel 103. The displayed values, ie C ₁ =C ₁ ^' , C ₃ =C ₃ ^' , if the initial C ₁ =250, C ₃ =50, the phase difference is judged to be C ₁ -C ₃ =200, falling into N=8, K =4, 191~255 segments under M=1 condition, because the contrast difference between black and white images is very large, if the average processing is performed, the contrast may be lowered, so no processing is performed at this time, and the interpolation coefficient a ₁ =1 is also obtained. a ₂ =0 brings in L ₁ ^' = a ₁ × C ₁ + a ₂ × C ₃ , and L ₁ ^' = 250 can be obtained. In the right graph of Fig. 2, the L ₁ ^' gray after the arithmetic processing of the present invention can be seen. The order value is still maintained at 250, so the averaging process is not performed, so as not to affect the contrast. It can also be seen from the description that the pixel driving system of the display provided by the invention can effectively improve the resolution without reducing the contrast effect.

3 is a system diagram of another preferred embodiment of the pixel driving system of the display of the present invention. Further, the pixel driving system of the display further includes a signal conversion unit 70 for inputting images. The color image signal input by the unit 10 is converted into a monochrome image signal, and the pixel drive system structure or the related function main body operation manners of the other displays are the same as those of the foregoing embodiment, and details are not described herein again.

Referring to FIG. 4 and FIG. 1 and FIG. 2 together, FIG. 4 is a flowchart of a display sub-pixel driving method of the present invention. The flow of the steps is as follows: Step 5001: Provide an image input unit 10 for inputting The image signal formed by the plurality of pixels 101, wherein the image signal is a monochrome image signal, and each of the pixels 101 includes a plurality of sub-pixels 103, wherein the constituent sub-pixels 103 can be L, C, R (where: L is Representing left-left; C is the representation of -center; and R is any of the right-right pixels 103, and then Proceed to step 5002.

Step 5002: Provide an image gray-scale difference calculation unit 20, which selects any one of the two adjacent pixels 101 of the plurality of pixels 101, wherein the sub-pixels 103 can be L, C, and R ( Where: L is a left-left; C is a medium-center; and R is a right-right sub-pixel 103 to perform gray-scale difference calculation to obtain a gray-scale difference value, and then enter the step 5003.

Step 5003: Provide a selection unit 30 for providing a variable K value, and dividing the grayscale value of each pixel 101 into threshold intervals formed by K threshold values according to the K value, wherein each threshold interval corresponds to one The interpolation equation and the interpolation coefficient are set, and then proceeds to step 5004.

Step 5004: A determination unit 40 is provided to determine which threshold interval the grayscale difference value is located, that is, to select the interpolation equation and the interpolation coefficient corresponding to the threshold interval, and then proceed to step 5005.

Step 5005: An image interpolation unit 50 is provided, which is calculated according to the interpolation equation and the interpolation coefficient corresponding to the threshold interval selected by the determining unit 40, to obtain a new grayscale value of the remaining sub-pixels 103, and finally Proceed to step 5006.

Step 5006: Provide an image output unit 60 for outputting new grayscale values.

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

10‧‧‧Image input unit

20‧‧‧Image grayscale difference calculation unit

30‧‧‧Selection unit

40‧‧‧judging unit

50‧‧‧Image Interpolation Unit

60‧‧‧Image output unit

70‧‧‧Signal conversion unit

101‧‧ ‧ pixels

103‧‧‧Subpixel

5001, 5002, 5003, 5004, 5005, 5006‧‧‧ steps

1 is a schematic diagram of a system of a preferred embodiment of a display pixel driving system of the present invention; FIG. 2 is a schematic diagram of a processing result of a preferred embodiment of a display pixel driving system of the present invention; A schematic diagram of another preferred embodiment of a display pixel driving system; FIG. 4 is a flow chart of a display sub-pixel driving method of the present invention.

10‧‧‧Image input unit

20‧‧‧Image grayscale difference calculation unit

30‧‧‧Selection unit

40‧‧‧judging unit

50‧‧‧Image Interpolation Unit

60‧‧‧Image output unit

Claims (10)

A pixel driving system for a display includes: an image input unit for inputting image signals formed by a plurality of pixels, and each of the pixels includes a plurality of sub-pixels; and an image gray-scale difference calculating unit selects the plurality of pixels Performing gray scale difference calculations on any one of the two adjacent pixels to form a gray scale difference value; a selection unit for providing a variable K value, and based on the K value The grayscale value of each pixel is divided into threshold intervals formed by K threshold values, wherein each threshold interval corresponds to a set interpolation equation; a determining unit determines that the grayscale difference value is located at the threshold In the interval, the interpolation equation corresponding to the threshold interval is selected; an image interpolation unit is calculated according to the interpolation equation corresponding to the threshold interval selected by the determining unit, to obtain the remaining sub-pixels. a new grayscale value; and an image output unit for outputting the new grayscale value. The pixel driving system of the display of claim 1, wherein the image signal is a monochrome image signal. The display sub-pixel driving system of claim 2, wherein the sub-pixel is any one of L (left), C (center), and R (right). The pixel drive system of the display of claim 1, wherein the image input unit further comprises a signal conversion unit for converting the color image signal input by the image input unit into a monochrome image signal. According to the pixel driving system of the display of claim 1, wherein the K value divides the grayscale value of each pixel into a threshold interval formed by K threshold values as [(1 ^* 2^N/ K)-M ₁ ], [(2 ^* 2^N/K)-M ₂ ], [(3 ^* 2^N/K)-M ₃ ], ..., [(K-1) ^* 2^N /K)-M _K-1 ], where K is any natural number, N is N bits of the gray scale value of the image signal, and M is an adjustment parameter. The pixel driving system of the display according to claim 5, wherein the adjustment parameter M ranges by - (1 ^* 2^N) / K ≦ M ₁ , M ₂ , M ₃ , ..., M _{K -1} ≦(1 ^* 2^N)/K. A pixel driving system for a display according to claim 1, wherein the interpolation equation is S ( x _i )= a ₁ x _i + a ₂ x _j , and a ₁ and a ₂ are interpolation coefficients, 0 ≦ a ₁ + a ₂ ≦1, x _i , x _j are the gray scale values of any of the adjacent subpixels, and S ( x _i ) is the new gray scale value. A display sub-pixel driving method includes: providing an image input unit for inputting image signals formed by a plurality of pixels, and each of the pixels includes a plurality of sub-pixels; and providing an image gray-scale difference calculation unit for selecting Performing grayscale difference calculation on any one of the two adjacent pixels of the plurality of pixels to obtain a grayscale difference value; providing a selection unit for providing a variable K value according to The K value divides the grayscale value of each pixel into a threshold interval formed by K threshold values, wherein each threshold interval corresponds to a set interpolation equation; and a judgment unit is provided to determine the grayscale difference value Located in the threshold interval, and selecting the interpolation equation corresponding to the threshold interval; providing an image interpolation unit according to the interpolation equation corresponding to the threshold interval selected by the determining unit, Deriving a new grayscale value of one of the remaining subpixels; and providing an image output unit for outputting the new grayscale value The display sub-pixel driving method of claim 8, wherein the sub-pixel can be any one of L (left), C (center), and R (right). The display sub-pixel driving method according to claim 8, wherein the threshold of the K threshold is formed by [(1 ^* 2^N/K)-M ₁ ], [(2 ^* 2) ^N/K)-M ₂ ], [(3 ^* 2^N/K)-M ₃ ], ..., [(K-1) ^* 2^N/K)-M _K-1 ], wherein K is any natural number, N is the N bits of the grayscale value of the image signal, and M is an adjustment parameter.