TWI780449B - Color gamut conversion method of OLED display panel and display device and information processing device using the same - Google Patents

Abstract

The present invention mainly discloses a color gamut conversion method of an OLED display panel, which is applied to an OLED display having an OLED display panel and a display panel driver chip, by storing an n-level color in the display panel driver chip Gamut conversion matrix (n≧4), and use the N-level color gamut conversion matrix to perform a mapping operation on the input (R, G, B) grayscale vector data, and then follow the mapped (R, G, B) grayscale The R, G, and B grayscale values in the level vector data each generate a corresponding pixel voltage to drive the OLED display panel, so as to ensure that the pixel color of the OLED display panel will not be oversaturated and the display screen will not be too bright and dazzling .

Description

Color gamut conversion method of OLED display panel and display device and information processing using same management device

The present invention relates to an OLED display panel, in particular to a color gamut conversion method for an OLED display panel that utilizes a multi-level conversion matrix for (R, G, B) mapping.

Due to the advantages of self-luminescence, wide viewing angle, high contrast, low power consumption and high reaction rate, organic light-emitting diodes (Organic Light-Emitting Diode, OLED) have been widely used, which are further divided into PMOLED and AMOLED. PMOLED has the advantage of saving power, but its response is slow, so it is gradually developing towards lighting applications; on the contrary, AMOLED is regarded as the best display panel that will replace LCD panels in the future because of its fast response. Compared with the best color gamut of the traditional LCD panel, which is only up to 72% NTSC, the AMOLED display panel has the characteristics of wide color gamut, and its best color gamut can reach or even exceed 100% NTSC.

The color gamut is used to represent the color range blocks that the display panel can display. In the same color space, the higher the color gamut percentage, the wider the color range that the display panel can display. In order to define the color gamut more clearly, the International Commission on Illumination (CIE) has developed a method for describing the color gamut: CIE-xy chromaticity diagram. Figure 1 shows the known CIE-xy chromaticity diagram. According to the current industry definition, the wide color gamut of smartphones and monitors refers to a color gamut higher than 100% sRGB. Simply put, the sRGB color gamut is the color system commonly used in smartphones and monitors.

However, as shown in Figure 1, DCI-P3 is a wider color gamut than sRGB. In other words, compared with the sRGB color gamut display panel, the wide color gamut screen can display richer and more vivid colors, so the original color gamut of the display panel needs to be converted to support the DCI-P3 color gamut. FIG. 2 shows a schematic diagram of conventional color gamut conversion. As shown in FIG. 2 , for a display equipped with an LCD panel, a third-order transformation matrix can be set in the display driver chip, and the third-order transformation matrix can be used to convert the sRGB color gamut to the DCI-P3 color gamut.

For a display equipped with an LCD panel, the third-order transformation matrix can transform between different color gamuts without any difference, because the LCD panel is a non-self-illuminating panel, and its RGB sub-pixels and pixels basically satisfy lvR+lvG+lvB=lvW, so the color gamut can be ideally converted without being affected by the reference color (Color Reference Image, I _RC ). From a mathematical understanding, the color gamut conversion of the LCD panel can be regarded as a linear mapping from one color gamut space to another color gamut space.

However, the OLED display panel is a self-illuminating panel, so it is easily affected by IRC during the color gamut conversion process, resulting in lvR+ _lvG +lvB>lvW between RGB sub-pixels and pixels. Simply put, even if an OLED display panel can convert from sRGB color gamut to DCI-P3, its screen color will be oversaturated because lvR+lvG+lvB>lvW, resulting in too bright and dazzling. From a mathematical understanding, the color gamut conversion of an OLED display panel is a non-linear space mapping conversion, and the ideal color gamut conversion cannot be completed directly through the conventional third-order transformation matrix. Space compression, rotation, and/or clipping must be considered at the same time. Everything changes.

It can be seen from the above description that there is an urgent need in the art for a new color gamut conversion method for OLED display panels.

The main purpose of the present invention is to provide a color gamut conversion method for an OLED display panel, which is applied to an OLED display having an OLED display panel and a display panel driver chip, so that the display panel driver chip has an n-level color gamut conversion method Matrix (n≧4), so that the ideal color gamut conversion of the OLED display panel can be accomplished by using the n-level color gamut conversion matrix, so that the screen color of the OLED display panel that has completed the color gamut conversion will not be too bright and dazzling due to oversaturation.

To achieve the above object, the present invention proposes an embodiment of the color gamut conversion method of the OLED display panel, which includes: performing a plurality of iterative operations to obtain data of a complex array (input RGB vector, target RGB vector); The input RGB vector is expanded into a first n-order vector and each of the target RGB vectors is expanded into a second n-order vector, n is an integer not less than 4, and an n-order transformation matrix is set so that each of the said first n-order The second n-order vector is equal to the product of the n-order conversion matrix and the first n-order vector, and then performs a minimum square difference on the n-order conversion matrix according to the data of the complex array (input RGB vector, target RGB vector). operation to obtain the value of each element of the n-order transformation matrix; and

When the OLED display panel is actually performing a display operation, a mapping operation is performed on the first n-order vector generated by a received piece of (R, G, B) data according to the n-order conversion matrix, and then according to the mapped R, G, and B grayscale values in a second n-level vector each generate a corresponding pixel voltage to drive the OLED display panel.

In one embodiment, the iterative operation includes:

drive the OLED display panel respectively according to the first R value, the first G value and the first B value of a preset RGB vector to obtain three first stimulus value coordinates to form a first array, and input RGB according to a The second R value, the second G value and the second B value of the vector respectively drive the OLED display panel to obtain three second stimulus value coordinates to form a second array, and according to the second R value, the second G value and the second B value set a third array;

executing a plurality of updating procedures to update the third array multiple times, the updating procedure comprising: obtaining an error array according to the difference between the product of the first array and the third array and the second array; updating the third array by taking the product of the inverse matrix of the array and the second array, and updating the second array according to the sum of a ratio of the second array to the error array; and

The target RGB vector is generated according to the second R value, the second G value, and the second B value in the third array.

In one embodiment, the ratio is a positive real number less than 1.

To achieve the above object, the present invention further proposes a display device, which has an OLED display panel and a control circuit for driving the OLED display panel, the control circuit has an n-order conversion matrix, n is greater than or equal to 4, and is Perform a mapping operation on a first n-order vector generated by a received piece of (R, G, B) data according to the n-order transformation matrix, and then perform a mapping operation according to R, G, B grayscale values each generate a corresponding pixel voltage, wherein the n-order conversion matrix is generated according to a color gamut conversion method, and the color gamut conversion method includes the following steps:

Perform complex number of iterative operations to obtain data of complex arrays (input RGB vector, target RGB vector); and

Expanding each of the input RGB vectors into a first n-order vector and expanding each of the target RGB vectors into a second n-order vector, and each of the second n-order vectors is equal to the n-order conversion matrix and a product of the first n-order vector, and then perform a minimum square difference operation on the n-order conversion matrix according to the data of the complex array (input RGB vector, target RGB vector) to obtain the n-order conversion matrix The value of each element of .

In one embodiment, the iterative operation includes:

drive the OLED display panel respectively according to the first R value, the first G value and the first B value of a preset RGB vector to obtain three first stimulus value coordinates to form a first array, and input RGB according to a The second R value, the second G value and the second B value of the vector respectively drive the OLED display panel to obtain three second stimulus value coordinates to form a second array, and according to the second R value, the second G value and the second B value set a third array;

executing a plurality of updating procedures to update the third array multiple times, the updating procedure comprising: obtaining an error array according to the difference between the product of the first array and the third array and the second array; updating the third array by taking the product of the inverse matrix of the array and the second array, and updating the second array according to the sum of a ratio of the second array to the error array; and

The target RGB vector is generated according to the second R value, the second G value, and the second B value in the third array.

In one embodiment, the ratio is a positive real number less than 1.

To achieve the above object, the present invention further proposes a display device, which has an OLED display panel and a control circuit for driving the OLED display panel, the OLED display panel is divided into a plurality of display blocks, and the control circuit has A plurality of n-level conversion matrices corresponding to the plurality of display blocks, n is greater than or equal to 4, and when performing a display operation, the control circuit is based on a corresponding n-level conversion matrix for a display block A first n-level vector generated by an input (R, G, B) data is subjected to a mapping operation, and then a corresponding gray scale value of R, G, and B in a second n-level vector after mapping is generated Pixel voltage, wherein each of the n-order conversion matrices is generated according to a color gamut conversion method, and the color gamut conversion method includes the following steps:

Perform complex number of iterative operations to obtain data of complex arrays (input RGB vector, target RGB vector); and

Expanding each of the input RGB vectors into a first n-order vector and expanding each of the target RGB vectors into a second n-order vector, and each of the second n-order vectors is equal to the n-order conversion The product of the matrix and a described first n-order vector, and then according to the data of the complex array (input RGB vector, target RGB vector), carry out a minimum square difference operation to a described n-order conversion matrix to obtain its matrix The value of each element.

In one embodiment, the iterative operation includes:

Driving one of the plurality of display blocks according to the first R value, the first G value and the first B value of a preset RGB vector to obtain three first stimulus value coordinates to form a first array , and according to the second R value of the input RGB vector, the second G value and the second B value respectively drive the block to obtain three second stimulus value coordinates to form a second array, and according to the second R value, the second G value and the second B value set a third array;

executing a plurality of updating procedures to update the third array multiple times, the updating procedure comprising: obtaining an error array according to the difference between the product of the first array and the third array and the second array; updating the third array by taking the product of the inverse matrix of the array and the second array, and updating the second array according to the sum of a ratio of the second array to the error array; and

The target RGB vector is generated according to the second R value, the second G value, and the second B value in the third array.

To achieve the above object, the present invention further proposes an information processing device, which has the aforementioned display device.

In a possible embodiment, the information processing device may be a smart phone, a smart watch, a smart bracelet, a tablet computer, a notebook computer, an all-in-one computer, or an access control device.

In order to enable your examiners to further understand the structure, features, purpose, and advantages of the present invention, drawings and detailed descriptions of preferred embodiments are hereby attached.

Fig. 3 shows the flowchart of an embodiment of the color gamut conversion method of OLED display panel of the present invention, wherein, the color gamut conversion method is applied in a display device, and the display device has an OLED display panel and is used for driving A control circuit of the OLED display panel, and the control circuit has an n-level conversion matrix generated according to a color gamut conversion method, n is greater than or equal to 4, to display (R, G, B) received by the OLED display panel A mapping operation is performed on the data to realize ideal color gamut conversion, so that the OLED display panel presents ideal picture colors.

As shown in Figure 3, the color gamut conversion method of the OLED display panel of the present invention includes: performing a plurality of iterative operations to obtain data of a complex array (input RGB vector, target RGB vector) (step S1); The vector is expanded into a first n-order vector and each of the target RGB vectors is expanded into a second n-order vector, n is an integer not less than 4, and an n-order conversion matrix is set so that each of the second n-order The vector is equal to the product of the n-order transformation matrix and the first n-order vector, and then a minimum square difference operation is performed on the n-order transformation matrix according to the data of the complex array (input RGB vector, target RGB vector) to obtain Obtain the value of each element of the n-order conversion matrix (step S2); performing a mapping operation on the first n-level vector, and then generating a corresponding pixel voltage according to the R, G, and B grayscale values in the second n-level vector after mapping to drive the OLED display panel (step S3).

In step S1, please refer to FIG. 4 for the flow of the iterative operation, which includes: respectively driving the OLED display panel according to the first R value, the first G value and the first B value of a preset RGB vector to obtain three The first stimulus value coordinates are used to form a first array, and the OLED display panel is respectively driven according to a second R value, a second G value and a second B value of the input RGB vector to obtain three second stimulus value coordinates To form a second array, and set a third array according to the second R value, the second G value and the second B value (step S11); perform a plurality of update procedures to perform a plurality of times on the third array Updating, the update procedure includes: obtaining an error array according to the difference between the product of the first array and the third array and the second array; updating the first array according to the product of the inverse matrix of the first array and the second array Three arrays; and updating the second array according to the sum of a ratio of the second array and the error array (step S12); and according to the second R value, the second G value and the first value in the third array Two B values generate the target RGB vector (step S13).

Next, the color gamut conversion method of the OLED display panel of the present invention will be described in more detail below in conjunction with the presentation of related mathematical formulas.

In step S11, R value (=1), G value (=1) and B value (=1) corresponding to a preset RGB vector (1,1,1) can be measured from an OLED display panel The three CIE 1931 XYZ coordinates, that is, the three first stimulus value coordinates. The three first stimulus value coordinates are expressed in a first-order array, which are respectively [Xr Yr Zr], [Xg Yg Zg] and [Xb Yb Zb]; wherein, Xr, Yr, and Zr are red stimulus values ( Tristimulus value), Xg, Yg, and Zg are green stimulus values, and Xb, Yb, and Zb are blue stimulus values. Afterwards, the three CIE 1931 XYZ coordinates are combined into an array M, which is the first array.

………………………(1) Mt=

………………(2)Then, according to the second R value (=Rt), the second G value (=Gt) and the second B value (=Bt) of the input RGB vector (Rt, Gt, Bt), respectively drive the OLED display panel to Three CIE 1931 XYZ coordinates, that is, the three second stimulus value coordinates are measured to form an array Mt, that is, the second array. Express the coordinates of the three second stimulus values in a first-order array, respectively [Xtr Ytr Ztr], [Xtg Ytg Ztg] and [Xtb Ytb Ztb], where Xtr, Ytr, and Ztr are red stimulus values, and Xtg , Ytg, and Ztg are green stimulus values, and Xtb, Ytb, and Ztb are blue stimulus values. The array M and the array Mt can be represented by the following formulas (1)-(2). M =

……………………(1) Mt=

………………(2)

。In addition, the third array set according to the second R value, the second G value and the second B value can be expressed as Mrgb=

.

In step S12, let the error array be expressed as Diff, then Diff=M*Mrgb-Mt, and then update Mrgb, so that Mrgb=M ^-1 *Mt, where M ^-1 is the inverse array of array M. Then, the array Mt is updated according to the sum of a ratio (eg, but not limited to 1/3) of the array Mt to Diff, that is, Mt←[Mt+( Diff /3)].

In addition, during the process of executing the updating procedure for multiple times, the value in Diff will gradually decrease until it is less than a reference difference or a preset difference, and the values of Rt, Gt, and Bt in Mrgb will also be different. converges to a value. The following table (1) reveals the data of the complex array (input RGB vector, target RGB vector) obtained through the iterative operation.

，第二n階向量可表為

，n階轉換矩陣可表為

，

。然後依表(1)所示的複數組(輸入RGB向量，目標RGB向量)的資料對該n階轉換矩陣進行一最小平方差(least squares)運算以得出該n階轉換矩陣的各個元素(a,b,c,d,e,f,g,h,I,j,k,l)的數值。 After obtaining the complex array data such as shown in Table (1), each input RGB vector can be expanded into a first n-order vector and each target RGB vector can be expanded into a second n-order vector as shown in step S2, n is an integer not less than 4, and an n-order transformation matrix is set so that each second n-order vector is equal to the product of the n-order transformation matrix and a first n-order vector. For example, taking n=4 as an example, the first n-order vector can be expressed as

, the second nth order vector can be expressed as

, the n-order transformation matrix can be expressed as

,

. Then according to the data of the complex array (input RGB vector, target RGB vector) shown in table (1), a minimum square difference (least squares) operation is carried out to this n-order conversion matrix to obtain each element of this n-order conversion matrix ( a,b,c,d,e,f,g,h,I,j,k,l).

對由接收到的一筆 (R,G,B)資料所產生的一第一n階向量

進行一映射操作，然後依映射後所產生的一第二n階向量

中的R、G、B數值各產生一對應的畫素電壓以驅動該OLED顯示面板，使該OLED顯示面板的畫素顏色不會過飽和而可避免畫面過於鮮豔、刺眼。After obtaining the n-order conversion matrix, the OLED display panel can use the n-order conversion matrix during the actual display operation.

For a first n-order vector generated by a received piece of (R, G, B) data

Perform a mapping operation, and then according to a second n-order vector generated after mapping

The R, G, and B values in each generate a corresponding pixel voltage to drive the OLED display panel, so that the pixel color of the OLED display panel will not be oversaturated and the picture will not be too bright and dazzling.

In addition, in the process of calculating the value of each element (a, b, c, d, e, f, g, h, I, j, k, l) of the n-order transformation matrix with the least squares operation , the following three formulas can be listed first:

Rt=a*R+b*G+c*B+d;

Gt=e*R+f*G+g*B+h; and

Bt=i*R+j*G+k*B+l.

Substituting the complex array (input RGB vector, target RGB vector) data shown in Table (1) into the above three formulas, a complex number of first simultaneous equations can be obtained to represent the four matrix elements a, b, c, d , the complex number of second simultaneous equations to represent the relationship between the four matrix elements e, f, g, h, and the complex number of third simultaneous equations to represent the four matrices i, j, k, l Element relationship. Then, the complex number of first simultaneous equations, the complex number of second simultaneous equations and the complex number of third simultaneous equations can be found by using the minimum square difference operation to find out (a, b, c, d), the best solution for (e, f, g, h), and the best solution for (i, j, k, l).

After calculating the optimal values of a, b, c, d, d, f, f, i, j, k, l, the input (R, G, B) data can be converted by using the n-order conversion matrix into the R, G, and B values in the second n-order vector. For example, assume that the target CIE-xy color coordinates produced by an OLED display panel for display data with RGB values (255, 188, 0) are (0.476, 0.46), and the color gamut is not converted The CIE-xy color coordinates produced by the OLED display panel for the display data of (255, 188, 0) are (0.457, 0.430), then the input (R, G, B) data ( After 255, 188, 0) is mapped to (255, 128, 0), the OLED display panel can generate the target CIE-xy color coordinates of (0.476, 0.46) according to the display data of (255, 128, 0).

FIG. 5 shows a structural diagram of an OLED display device applying the color gamut conversion method of the OLED display panel of the present invention. As shown in FIG. 5 , the OLED display device 1 mainly includes a display panel driving chip 11 and an OLED display panel 12 . In particular, the OLED display device 1 can divide the OLED display panel 12 into a plurality of display blocks 121 according to a plurality of hues (Hue), and correspondingly set the color gamut conversion shown in FIG. 3 for the plurality of display blocks 121. The plurality of n-order conversion matrices generated by the method are used to perform a first n-order vector generated by a received piece of (R, G, B) data according to an n-order conversion matrix in each display block 121 A mapping operation, and then generate a corresponding pixel voltage according to the R, G, and B grayscale values in the second n-level vector after mapping, so that each display block 121 of the OLED display panel 12 presents Ideal picture color.

It should be known that hue is the name used to distinguish colors, which are called according to the appearance of colors with different wavelengths, such as red, orange, yellow, yellow-green, green, cyan, cyan, indigo, blue, purple, magenta, purple, etc. . Based on the basic definition of hue, for example, the OLED display panel 12 can be divided into twelve display blocks 121 , and one n-order conversion matrix is provided for each display block 121 . In this way, the display panel driver chip 11 can use twelve n-order conversion matrices to complete the ideal color gamut conversion of the OLED display panel 121, so that the pixel color of the OLED display panel 12 that has completed the color gamut conversion will not be oversaturated. And can avoid the picture is too bright, dazzling.

In this way, the above has completely and clearly described a color gamut conversion method of an OLED display panel of the present invention; and, through the above, it can be known that the present invention has the following advantages:

(1) The present invention discloses a color gamut conversion method of an OLED display panel, which is applied to an OLED display having an OLED display panel and a display panel driver chip, so that the display panel driver chip has an n-level color gamut conversion matrix (n≧4), thereby using the N-order color gamut conversion matrix to complete the ideal color gamut conversion of the OLED display panel, so that the pixel color of the OLED display panel that has completed the color gamut conversion will not be oversaturated and the picture will be avoided. dazzling.

(2) The present invention also discloses an information processing device, which has the display device of the present invention as described above. Moreover, the information processing device can be a smart phone, a smart watch, a smart bracelet, a tablet computer, a notebook computer, an all-in-one computer, or an access control device.

It must be emphasized that what is disclosed in the above-mentioned case is a preferred embodiment, and all partial changes or modifications derived from the technical ideas of this case and easily deduced by those familiar with the technology are all inseparable from the patent of this case. category of rights.

To sum up, regardless of the purpose, means and efficacy of this case, it shows that it is very different from the conventional technology, and its first invention is practical, and it does meet the patent requirements of the invention. I implore your review committee to understand it clearly and grant a patent as soon as possible. Society is for the Most Prayer.

S1: Execute multiple iterations to obtain the data of the complex array (input RGB vector, target RGB vector)

S2: expanding each of the input RGB vectors into a first n-order vector and expanding each of the target RGB vectors into a second n-order vector, where n is an integer not less than 4, and an n-order conversion matrix is set to Make each of the second n-order vectors equal to the product of the n-order transformation matrix and a described first n-order vector, then according to the data of the complex array (input RGB vector, target RGB vector) to the n-order transformation matrix Performing a least square difference operation to obtain the value of each element of the n-order transformation matrix

S3: when the OLED display panel is actually performing a display operation, perform a mapping operation on the first n-order vector generated by a received piece of (R, G, B) data according to the n-order conversion matrix, and then according to R, G, and B grayscale values in a second n-level vector after mapping each generate a corresponding pixel voltage to drive the OLED display panel

S11: Drive the OLED display panel respectively according to the first R value, the first G value and the first B value of a preset RGB vector to obtain three first stimulus value coordinates to form a first array, and according to a description The second R value, the second G value and the second B value of the input RGB vector respectively drive the OLED display panel to obtain three second stimulus value coordinates to form a second array, and according to the second R value, the second The second G value and the second B value set a third array

S12: Execute a plurality of update procedures to update the third array a plurality of times, the update procedure includes: obtaining an error array according to the difference between the product of the first array and the third array and the second array; updating the third array by taking the product of the inverse matrix of the first array and the second array; and updating the second array according to the sum of a ratio of the second array to the error array

S13: Generate the target RGB vector according to the second R value, the second G value and the second B value in the third array

1: OLED display device

11: Display panel driver chip 12:OLED display panel 121: Display blocks

Fig. 1 depicts a conventional CIE-xy chromaticity diagram; Fig. 2 depicts a schematic diagram of a conventional color gamut conversion; Fig. 3 depicts the process flow of an embodiment of the color gamut conversion method of the OLED display panel of the present invention 4 shows a flowchart of an embodiment of the iterative operation of the color gamut conversion method of FIG. 3; and FIG. 5 is a structural diagram of an OLED display device applying the color gamut conversion method of the OLED display panel of the present invention.

S1: Execute multiple iterations to obtain the data of the complex array (input RGB vector, target RGB vector)

S2: expanding each of the input RGB vectors into a first n-order vector and expanding each of the target RGB vectors into a second n-order vector, where n is an integer not less than 4, and an n-order conversion matrix is set to Make each of the second n-order vectors equal to the product of the n-order transformation matrix and a described first n-order vector, then according to the data of the complex array (input RGB vector, target RGB vector) to the n-order transformation matrix Performing a least square difference operation to obtain the value of each element of the n-order transformation matrix

S3: when the OLED display panel is actually performing a display operation, perform a mapping operation on the first n-order vector generated by a received piece of (R, G, B) data according to the n-order conversion matrix, and then according to R, G, and B grayscale values in a second n-level vector after mapping each generate a corresponding pixel voltage to drive the OLED display panel

Claims (10)

A color gamut conversion method of an OLED display panel, comprising: performing a plurality of iteration operations to obtain data of complex arrays (input RGB vectors, target RGB vectors); expanding each of the input RGB vectors into a first n-order vector and Each of the target RGB vectors is expanded into a second n-order vector, n is an integer not less than 4, and an n-order conversion matrix is set so that each of the second n-order vectors is equal to the n-order conversion matrix and one described The product of the first n-order vector, and then perform a minimum square difference operation on the n-order conversion matrix according to the data of the complex array (input RGB vector, target RGB vector) to obtain the value of each element of the n-order conversion matrix ; and when the OLED display panel is actually performing a display operation, a mapping operation is performed on a first n-order vector generated by a received piece of (R, G, B) data according to the n-order conversion matrix, and then according to The mapped R, G, and B grayscale values in the second n-level vector each generate a corresponding pixel voltage to drive the OLED display panel. The method for converting the color gamut of an OLED display panel according to Claim 1, wherein the iterative operation includes: respectively driving the OLED display panel according to the first R value, the first G value, and the first B value of a preset RGB vector Obtaining three first stimulus value coordinates to form a first array, and respectively driving the OLED display panel according to a second R value, a second G value and a second B value of the input RGB vector to obtain three first stimulus value coordinates Two stimulus value coordinates are used to form a second array, and a third array is set according to the second R value, the second G value and the second B value; multiple update procedures are performed to perform multiple times on the third array Updating, the update procedure includes: obtaining an error array according to the difference between the product of the first array and the third array and the second array, updating the first array according to the product of the inverse matrix of the first array and the second array Three arrays, and updating the second array according to the sum of a ratio of the second array and the error array; and generating according to the second R value, the second G value and the second B value in the third array The destination RGB vector. The color gamut conversion method of an OLED display panel as claimed in Claim 2, wherein the ratio is a positive real number less than 1. A display device having an OLED display panel and a control circuit for driving the OLED display panel, the control circuit has an n-order conversion matrix, n is greater than or equal to 4, and is received according to the n-order conversion matrix Perform a mapping operation on a first n-order vector generated by a piece of (R, G, B) data, and then generate a corresponding picture according to the R, G, and B gray-scale values in a second n-order vector after mapping Pixel voltage, wherein, the n-order conversion matrix is generated according to a color gamut conversion method, and the color gamut conversion method includes the following steps: Perform complex number of iterative operations to obtain data of complex arrays (input RGB vector, target RGB vector); and Expanding each of the input RGB vectors into a first n-order vector and expanding each of the target RGB vectors into a second n-order vector, and each of the second n-order vectors is equal to the n-order conversion matrix and a product of the first n-order vector, and then perform a minimum square difference operation on the n-order conversion matrix according to the data of the complex array (input RGB vector, target RGB vector) to obtain the n-order conversion matrix The value of each element of . The display device according to claim 4, wherein the iterative operation includes: drive the OLED display panel respectively according to the first R value, the first G value and the first B value of a preset RGB vector to obtain three first stimulus value coordinates to form a first array, and input RGB according to a The second R value, the second G value and the second B value of the vector respectively drive the OLED display panel to obtain three second stimulus value coordinates to form a second array, and according to the second R value, the second G value and the second B value set a third array; executing a plurality of updating procedures to update the third array multiple times, the updating procedure comprising: obtaining an error array according to the difference between the product of the first array and the third array and the second array; updating the third array by taking the product of the inverse matrix of the array and the second array, and updating the second array according to the sum of a ratio of the second array to the error array; and The target RGB vector is generated according to the second R value, the second G value, and the second B value in the third array. The display device according to claim 5, wherein the ratio is a positive real number less than 1. A display device having an OLED display panel and a control circuit for driving the OLED display panel, the OLED display panel is divided into a plurality of display blocks, and the control circuit has a plurality of display blocks corresponding to the plurality of display blocks An n-order conversion matrix, where n is greater than or equal to 4, and when performing a display operation, the control circuit is to input (R, G, B) data to a display block according to a corresponding n-order conversion matrix A mapping operation is performed on the generated first n-order vector, and then a corresponding pixel voltage is generated according to the R, G, and B gray-scale values in a second n-order vector after mapping, wherein each of the n The order conversion matrices are all generated according to a color gamut conversion method, and the color gamut conversion method includes the following steps: Perform complex number of iterative operations to obtain data of complex arrays (input RGB vector, target RGB vector); and Expanding each of the input RGB vectors into a first n-order vector and expanding each of the target RGB vectors into a second n-order vector, and each of the second n-order vectors is equal to the n-order conversion The product of the matrix and a described first n-order vector, and then according to the data of the complex array (input RGB vector, target RGB vector), carry out a minimum square difference operation to a described n-order conversion matrix to obtain its matrix The value of each element. The display device according to claim 7, wherein the iterative operation includes: Driving one of the plurality of display blocks according to the first R value, the first G value and the first B value of a preset RGB vector to obtain three first stimulus value coordinates to form a first array , and according to the second R value of the input RGB vector, the second G value and the second B value respectively drive the block to obtain three second stimulus value coordinates to form a second array, and according to the second R value, the second G value and the second B value set a third array; executing a plurality of updating procedures to update the third array multiple times, the updating procedure comprising: obtaining an error array according to the difference between the product of the first array and the third array and the second array; updating the third array by taking the product of the inverse matrix of the array and the second array, and updating the second array according to the sum of a ratio of the second array to the error array; and The target RGB vector is generated according to the second R value, the second G value, and the second B value in the third array. An information processing device having the display device according to any one of claims 4 to 8. The information processing device as described in Claim 9 is an electronic device selected from the group consisting of a smart phone, a smart watch, a smart bracelet, a tablet computer, a notebook computer, an all-in-one computer, and an access control device.

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