KR20070079220A - Color temperature setting and displaying method - Google Patents

Abstract

A method for setting and displaying a color temperature is provided to acquire and store a real color coordinate system position displacement value according to the increase and decrease of a unit color through real measurement and calculate an accurate color temperature of an image whose color temperature is changed by a color increase and decrease value provided from a user. Color-classified gain values for a certain color temperature are produced and applied through measurement. The displacement on a color coordinate system changed after a color value is increased and decreased by the minimum unit is acquired according to respective colors through measurement. If a user designates color-classified increase and decrease degree, a picture is displayed in a corresponding state and a position on the color coordinate system according to the color-classified increase and decrease value designated by the user is calculated on the basis of the acquired displacement on the color-classified color coordinate system. A color temperature according to the position on the color coordinate system is acquired.

Description

How to set and display color temperature {COLOR TEMPERATURE SETTING AND DISPLAYING METHOD}

1 is a diagram illustrating a relationship between a general display unit and an image signal processor.

2 is a conceptual diagram showing a white balance setting process.

3 is a gain calculation value for each color for white balance correction.

4 is a correlation between color temperature and color gain.

5 is a relationship diagram of conversion between color coordinates.

6 is a standard XYZ color coordinate system.

7 is an exemplary view of a color temperature display screen;

*** Explanation of symbols for main parts of drawing ***

10: video signal processor 20: display driver

30: display device 40: color temperature measuring instrument

50: XYZ coordinate system 51: color temperature

52: xyY coordinate system 53: RGB coordinate system

60: color temperature display section 70: color adjustment section

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a color temperature setting and display method, and more particularly, to a color temperature setting and display method for specifying an accurate color temperature in consideration of deviations between products existing in each flat panel display panel.

Devices using flat panel displays such as TFT liquid crystal display (LCD), electroluminescent display panel (PDP) devices, and plasma display panel (PDP) devices are basically white balance in order to express colors as they are. To provide accurate white. The white balance refers to an operation of adjusting R, G, and B, which are three primary colors of light, to adjust an appropriate color temperature so that pure white objects appearing in different colors according to light sources (sunlight, fluorescent, incandescent, etc.) are white. do.

Color temperature refers to the temperature of light by complete heat radiation. When heat is applied to the black body at the absolute temperature of 0 degrees (-273 ° C), the lowest temperature, radiation is generated. It is expressed in units. Since the unit is Kalvin, it is denoted by 'K'. The color temperature is changed from red to orange, yellow, white and blue.

For example, in a color temperature, a certain color has an overall red hue under incandescent lamps, and a blue hue under incandescent light as compared with incandescent lamps. In other words, the color tone appears as a blue color when the color temperature is high, and when the color temperature is low, the color as a red color. In this case, the color tone that appears as a whole is related to the color temperature, and to change the color tone, the color temperature must be changed.

Various display devices employing the flat panel display panel display color image characteristics that are slightly different for each display device even when a uniform image signal provided by the image signal processor is displayed. That is, even if the same image signal is provided to the same type of flat panel display panel, the same video output is not provided exactly due to the deviation of the flat panel panel itself. Therefore, as shown in FIG. 1, the color values of the images provided to the display driver 20 by the image signal processor 10 are individually calculated by considering the characteristics of the corresponding display panels (Gain_R, Gain_G, Gain_B) is multiplied by the color values R, G, and B of the actual image to obtain new color values (R '= Gain_R × R, G' = Gain_G × G, B '= Gain_B × B). That is, the image signal processor 10 processes the image input applied to generate R ', G', and B 'values compensated for the characteristics of each flat panel display panel, and then outputs the image data to the display driver 20 as image data for display. to provide.

Currently, most flat panel display devices provide a function of selecting a predetermined color temperature by a user's operation. In general, two flat display devices provide two color temperatures of 6500K and 9300K. Occasionally, various color temperature selections are possible by calculating and storing gains of colors for more color temperatures based on actual measurements.

However, there are few cases in which color temperature values are changed by adjusting the degree of individual R, G, and B values, and in some cases, the color temperature is roughly provided by adjusting R, G, and B values. This uncomplicated simple arithmetic operation only provided inaccurate color temperature values. In other words, since individual panel characteristics are not taken into account, the color temperature value of the actual displayed screen cannot be accurately known, and it is difficult to finely adjust the white balance by the user. Without it, it was impossible to set multiple display panels to the same color temperature.

The purpose of the embodiment of the present invention newly proposed to perform precise color temperature control, which was impossible for the above reason, using only a display device, is to obtain and store the actual color coordinate system position displacement value according to the unit color increase and decrease through actual measurement. The present invention provides a color temperature setting and display method for calculating an accurate color temperature of an image in which a color temperature is changed by a color increase / decrease value provided by a user.

Another object of the embodiment of the present invention is to provide an accurate color temperature of the image actually displayed in accordance with the increase or decrease of the color designated by the user through the actual measurement in consideration of the characteristics of the display panel, thereby providing an accurate color temperature with only the display device without additional measurement equipment. It is to provide a color temperature setting and display method that can be matched.

Another object of the embodiments of the present invention is to set the correct color temperature while checking the numerical value in consideration of the characteristics of each display panel so that the plurality of display devices can be set to the same specific color temperature. The present invention provides a color temperature setting and display method for reducing color temperature variation.

Another object of an embodiment of the present invention is to provide a color temperature setting and display method for allowing a user to finely adjust a color temperature according to the type of an image so as to manually set an accurate white balance.

Another object of the embodiments of the present invention is to use the on-screen display interface provided by the display device, and the user can easily adjust the color temperature to the color value without any additional device, and the correct color temperature at that time is absolute regardless of the panel deviation. It is to provide a color temperature setting and display method that can be confirmed by numerical information.

Another object of the embodiments of the present invention is to provide a color temperature setting and display method for precisely setting a white balance provided in a display device in consideration of an external light source so that a color that a real viewer feels can be matched to a standard color.

Another object of the embodiments of the present invention is to provide a color temperature setting and display method which can provide a color temperature value at high speed without burdening the system by implementing color temperature adjustment provided to the display device by only a very simple operation and memory content search. To provide.

In order to achieve the above object, the color temperature setting method according to an embodiment of the present invention comprises the steps of calculating and applying the gain values for each color for a predetermined color temperature by measuring; Increasing and decreasing the color value by a minimum unit and acquiring the displacement on the changed color coordinate system through measurement for each color; Calculating a position on a color coordinate system according to a color increase / decrease value designated by the user based on the obtained displacement on the color coordinate system for each color while displaying a screen in a corresponding state when the user designates a degree of increase / decrease for each color; Obtaining a color temperature according to a position on the color coordinate system.

In addition, another embodiment of the present invention, the step of calculating and applying the gain values for each color for a predetermined reference color temperature through measurement; Increasing and decreasing the color value to a unit size to be changed by a user designation, and obtaining a displacement on the changed color coordinate system through measurement for each color; Selecting the reference color temperature as any other reference color temperature and repeating the steps to obtain and store the color coordinate system displacement with respect to the reference color temperature; When the user selects the reference color temperature and specifies the increase / decrease for each color, the color is changed by the increase / decrease value designated by the user based on the color coordinate system displacement for each color according to the obtained reference color temperature while displaying the screen in a corresponding state. Calculating a position on the coordinate system; Obtaining a color temperature according to a position on the color coordinate system.

In addition, another embodiment of the present invention comprises the steps of the user changing the color temperature of the display image by setting the increase and decrease for each color using the on-screen display interface; Calculating a position change of the color coordinate system due to the set increase / decrease value based on the displacement value of the color coordinate system by the unit increase / decrease value for each color in consideration of characteristics of an individual display panel; Detecting a corresponding color temperature using the calculated new color coordinate system position and providing the same to the user using the on-screen display interface.

Embodiments of the present invention as described above will be described in detail with reference to the accompanying drawings.

FIG. 2 illustrates a process of setting color gains to compensate for deviations generated for each display panel of the display device 30 so as to provide a standard color image. As shown in FIG. Applying the generated pattern signal, it shows a situation to measure it through a separate dedicated color temperature measuring instrument (40). For example, after the image pattern signal of 6500K is applied to the display device 30, the color temperature of the image provided on the actual display panel is exactly 6500K, and the measurement is performed through the measuring device 40, and the measured color temperature at that time is referred to. The color gain of the color values (R, G, B) provided by the image signal processor is determined to be accurate to 6500K. Since the color gain includes characteristic values of individual panels, corresponding color gains are different for each display device.

In general, the display device determines the color gain through white balance correction according to several color temperatures. 3300K, 6500K, 9300K, and 12000K are mainly used.

FIG. 3 shows the color gain for white balance correction with respect to the predetermined reference color temperature 6500K obtained as measured in the same manner as in FIG. 2. Each gain obtained may vary from panel to panel, and in practice, a method of multiplying the percentage value by 100 and multiplying the color signal of an image to be applied is used.

4 shows the obtained white balance correction color gains at a color temperature position as a reference, and is then connected in a straight line. As shown in FIG. 4, it can be seen that they have different values according to the change of the reference color temperature. The values shown are to be recorded in an on-screen display (OSD) related area for adjustment. Although there may be other methods, in general, the OSD should have a separate recordable erasable memory (mainly flash memory) area in order to store various image-related settings selected by the user using the OSD interface. The method of storing the characteristic value of is used. Subsequently, in order to actually drive white balance, the image signal processing unit obtains each gain value determined and determined through the manufacturing measurement in the memory for storing the setting of the OSD and uses it.

In the embodiment of the present invention, by using the characteristic value of the individual panel by the measurement to the maximum, it is possible to obtain a color temperature value as close to the actual color temperature value as possible without the need for additional equipment by only considering the characteristics of the individual panel.

First, as shown in FIG. 2, a color gain for setting white balance with respect to an accurate reference color temperature is determined. At this time, the color gain is determined by measuring the color temperature of the image actually displayed using the dedicated device 40 and adjusting each color so that the position of the color coordinate system corresponding to the color temperature becomes the standard color temperature. The color coordinate system refers to a coordinate system according to color models displaying colors, and the color model includes hue, saturation, chroma, lightness, and brightness. Used to specify a color that is classified according to the same attributes. Color models include RGB (red, green, blue) models, HSB / HLS models, Munsell color systems, and CIE color models. Among these, the CIE color model was determined by the Commission Internationale de L'Eclairage (CIE), which sets the standard for lightings. Representative CIE color models include CIE XYZ and CIE xyY. . The direct use of the RGB function (actual primary color light) yields at least one negative value in the calculation of these values, which means that a mixture of RGB primary colors does not produce practically all color light, Because it is easy to make errors in the CIE, the CIE adopts the tristimulus value notation based on any virtual trichromatic light with no negative values. The tristimulus values by these virtual trichromatic light are represented by X, Y, and Z, and this is called CIE tristimulus value. This is the basic concept of CIE XYZ.

Referring to the basic trajectory of CIE XYZ shown in FIG. 6 for a while, a horseshoe-shaped chromaticity diagram surrounded by a spectral trajectory and a monochromatic light trajectory represents a maximum chromaticity range in which the coordinates of the actual photostimulation can be found. Since Y is generally regarded as an object's brightness property, only two dimensions are considered by the assumption that it has the same brightness value. The CIE xyY chromaticity diagram has a three-dimensional shape with the addition of the brightness axis Y and can be easily converted to CIE XYZ.

5 shows the correlation between various coordinate systems and color temperature, since the RGB coordinate system 53 with many colors that cannot be substantially represented is difficult to convert to color temperature as it is, and is substantially converted to the CIE XYZ coordinate system 50. The CIE XYZ coordinate system 50 and the CIE xyY coordinate system 52 can be easily converted to each other. In addition, since the corresponding color temperature 51 can be converted using the spectrum table of each coordinate system provided by the CIE, the XYZ or xyY coordinate system is mainly used for white balance correction.

Therefore, in the present embodiment, it is assumed that white balance correction is performed using the XYZ coordinate system. As described above, color gains for obtaining a specific color temperature (that is, specific X and Y coordinates) are obtained and stored through the method of FIG. 2. These color gains have different values depending on the reference color temperature as shown in FIGS. 3 to 4, and these values are also different among the individual display panels. In other words, the characteristics of the panel are considered first.

Subsequently, in the present invention, the color gain is applied by applying the color gain at a predetermined color temperature, and the color temperature is changed by the increment of each color that can be changed by the user's designation. By doing so, the color coordinate system displacement trend according to the increase or decrease of the color arbitrarily designated by the user may be obtained in consideration of the characteristics of each panel. That is, at this time, the characteristics of the panel are secondarily considered in calculating the color temperature.

For example, if the X and Y coordinates of the CIE XYZ coordinate system obtained at the precision used by the device at 6500K are X = 311 and Y = 329, the color gain applied to the panel is determined so that the corresponding color coordinates (= color temperature) are used. Obtain arithmetic rules that take into account the characteristics of the panel. In addition, in the state of image output (image output in consideration of gain) in which the panel characteristic is applied by applying a corresponding operation rule, a predetermined color (for example, as a minimum unit of color adjustment control that a user can specify through an interface such as OSD) For example, after adding or subtracting R), a color coordinate (for example, X = 313 and Y = 333) for a new color temperature image provided by the panel is obtained through a measuring device. The color coordinates may be provided directly by the corresponding measuring device, and may be converted using an XYZ coordinate system conversion table after obtaining the color temperature. If the displacement between the color coordinates (X = 313, Y = 333) and the reference color coordinates (X = 311, Y = 329) by 6500K is obtained, the displacement becomes ΔX = 2, ΔY = 4, so it is simply Rdelta_x It is assumed that = 2 and Rdelta_y = 4, and the displacement value is stored in an arbitrary memory area of the display device (mainly, a memory area storing OSD related information). This process is also performed for the other colors G and B. Since the displacement values of each color are obtained through measurement, the panel characteristics are considered first in the process of applying the image gain, and the panel characteristics are considered secondarily in the process of calculating the displacement value, thereby optimizing the panel. Displacement calculation rules can be obtained. For example, it is assumed that a unit displacement value of G color is obtained as Gdelat_x = 7 and Gdelta_y = 4, and a unit displacement value of B color is obtained as Bdelta_x = 5 and Bdelta_y = 6.

Subsequently, when the user manually adds or subtracts each color setting value through a color adjustment menu provided through a predetermined interface in an image displayed with a 6500K color temperature, the screen image is provided with a changed color temperature according to the corresponding addition or subtraction. It is possible to obtain a new position value by grasping the addition or subtraction of the color set by the position shift on the color coordinates based on the stored displacement value. For example, if the user increases the R color by 2 spaces, increases the G color by 1 space, and increases the B color by 3 spaces, the displacement first changes the R color at the default positions of X = 311 and Y = 329. According to the present invention, X = 315 and Y = 337, X = 322 and Y = 341 according to the G color change, and X = 337 and Y = 359 according to the B color change. Therefore, the color temperature at this time becomes a value corresponding to color coordinates X = 337 and Y = 359. The correlation between the color temperature and the color coordinate system may use the XYZ coordinate system and color temperature correlation information provided by the CIE (a numerical table of the XYZ coordinate system and the color temperature relationship graph shown in FIG. 6). It can be stored in the system's memory and used a simple lookup or lookup table reference.

Therefore, the new color coordinate system obtained by the user manually adjusting the color is different for each panel, and the color temperature provided accordingly is also the actual color temperature provided by the corresponding panel according to the characteristics of the panel. This provides much higher accuracy compared to the conventional method of obtaining color temperature by simply calculating without considering the characteristics of the panel. This allows fine adjustments to achieve the desired color temperature and reduces color deviations at specific color temperatures that can occur between multiple products-even in the conventional way, even if a specific color temperature is finely adjusted to a specific value, the panels Differences in the characteristics of the liver can cause actual color differences.

The above description is for a predetermined reference color temperature 6500K. Since the panel characteristics (color gain, color coordinate system position displacement due to color change) may differ depending on the reference color temperature, The color coordinate system displacement values obtained at the reference color temperature are calculated by calculating and storing the color coordinate system displacement values according to the color gain and color unit increase and decrease described above. Should be used.

For example, if the user-specified reference color temperature is set to 3300K, 6500K, 9300K, and 12000K, the color gains of FIGS. 3 to 4 are determined for each reference color temperature through measurement. After displaying the image of the corresponding color temperature by applying the obtained color gain at a predetermined reference color temperature, the color coordinate system is changed by measuring the color temperature of the changed image by increasing and decreasing the color by a minimum unit of color increase and decrease that can be set by the user. This is done for all colors and stored as color shift values according to a predetermined reference color temperature. The same process can be performed at other reference color temperatures to store a set of color displacement values according to the reference color temperature.

As can be seen from the correlation of the coordinate system shown in FIG. 5, the CIE_xyY coordinate system may be used instead of the CIE_XYZ coordinate system described above, although there may be colors that cannot be expressed, it is not impossible to use the RGB coordinate system. What is important is that the panel characteristics must be reflected in the color temperature conversion process in multiple steps so that the actual color temperature can be obtained according to the characteristics of the panel. Although the above procedure seems complicated, the color coordinate system can be moved by the user's color increase or decrease in actual application, and the calculated color temperature by the new color coordinate system can be easily performed by checking the lookup table. Is extremely insignificant, and it is possible to calculate color coordinate position and convert color temperature at high speed without burdening the system.

FIG. 7 illustrates a user interface applying the above-described embodiment and simply uses a screen provided as one of menus of an OSD.

As shown in the drawing, a color temperature display unit 60 for selecting a reference color temperature and displaying a current actual color temperature and a color adjusting unit 70 for increasing and decreasing respective colors are included. Although the display method is similar to the conventional OSD menu for general color temperature setting or color adjustment, the operation method is different as described above.

That is, the user displays an interface having a function of selecting a reference color temperature and adjusting a color as shown in a screen by operating a user interface such as an ODS or the like, and first, operating a color temperature display unit 60 to set a reference color temperature. Choose. The color temperature may be set by the designer at minute intervals, or only about 2 to 4 colors may be set. However, for each reference color temperature, color coordinate system displacements for color gain and color increase / decrease should be measured and stored in the display device at the manufacturing stage.

The image is adjusted to the reference color temperature set by the user's selection, and the white balance is corrected by the color gain for the color temperature. Thereafter, when the user selects the color adjuster 70 to increase or decrease an arbitrary color, a new color coordinate system position that is changed by the increased or decreased color may be obtained using the color coordinate system displacement measured and stored at a corresponding reference color temperature. Then, the color temperature value according to the new position of the color coordinate system is obtained by using a lookup table in which the relationship information between the color coordinate system and the color temperature is stored, and the color temperature value is displayed on the color temperature display unit 60 as accurate numerical information. . This process is repeatedly performed until the user's setting is completed.

Although the illustrated user interface has a basic simple structure, various modifications such as three-dimensional configuration or positioning may be performed on the graph using the graph of FIG. Numerical information on the color temperature or numerical information on the position of the moving color coordinate system may be provided.

As described above, the color temperature setting and display method according to the embodiment of the present invention obtains and stores the actual color coordinate system position displacement value according to the unit color increase and decrease through actual measurement, and then selects a color based on the user's selection. There is an effect that can accurately provide the color temperature of the image changed by the increase and decrease in consideration of the panel characteristics.

Color temperature setting and display method according to an embodiment of the present invention by providing the accurate color temperature of the image actually displayed in accordance with the increase or decrease of the color specified by the user through the actual measurement in consideration of the characteristics of the display panel, without any additional measurement equipment It is effective to set the correct color temperature only with the display device.

In the color temperature setting and display method according to an embodiment of the present invention, a plurality of displays may be set by allowing a plurality of display devices to be set to the same specific color temperature by setting the correct color temperature while checking numerical values in consideration of characteristics of each display panel. When the devices are used, the color temperature variation of the image can be reduced, so that the display uniformity of the multi-cube system using the precision monitor or a plurality of display devices used in broadcasting stations or studios can be matched.

The color temperature setting and display method according to an embodiment of the present invention allows the user to finely adjust the color temperature of the display device according to the type of image or the external light source, thereby effectively setting the correct white balance.

In the color temperature setting and display method according to an embodiment of the present invention, the color temperature can be precisely set by using the on-screen display interface provided by the display device, so that the user can easily adjust the color temperature to the color value without any additional device. In addition, there is an effect that can confirm the accurate color temperature at that time as absolute numerical information irrespective of the panel deviation.

The color temperature setting and display method according to the embodiment of the present invention enables the color temperature adjustment provided to the display device to be realized by only a very simple operation and memory content search, thereby providing the color temperature value at high speed without putting a load on the system. It works.

Claims (17)

Calculating and applying gains for each color for a predetermined color temperature through measurement; Increasing and decreasing the color value by a minimum unit and acquiring the displacement on the changed color coordinate system through measurement for each color; If the user designates the degree of increase or decrease for each color, calculating a position on the color coordinate system according to the color increase / decrease value designated by the user based on the obtained displacement on the color coordinate system for each color while displaying the screen in a corresponding state; And obtaining a color temperature according to a position on the color coordinate system. The method of claim 1, wherein after increasing or decreasing the color value in a predetermined unit, acquiring the displacement on the changed color coordinate system through measurement for each color, Adding or subtracting color values of each of R, G, and B in a minimum unit that can be designated by the user; Measuring the changed screen through an external measuring device to obtain a positional displacement on the color coordinate system and setting it as a reference displacement according to a unit change of a corresponding color; And performing all of the above steps for each of the colors to set the displacement for each color. The method of claim 1, wherein the calculating of the position on the color coordinate system according to the color increase / decrease value designated by the user based on the displacement for each color comprises: Obtaining a new color coordinate system position according to the increase and decrease of the single color indicated by the user by substituting the user-designated single color increase / decrease value into the color coordinate system position displacement relationship according to the unit increase / decrease value; And repeating the above steps for all other colors added or decreased by the user. The method of claim 1, wherein the obtaining of the color temperature according to the position on the color coordinate system comprises: And obtaining color temperature information for a predetermined color coordinate system by using standard information about a color temperature corresponding to the coordinate position of the color coordinate system. The method of claim 1, wherein the user designates the degree of increase or decrease by color. And manually increasing or decreasing the setting values for each color shown in the user interface provided by the on-screen display by a multiple of the minimum unit. And providing the color temperature obtained in the step of acquiring the color temperature according to the position on the color coordinate system on the screen as a result of the manual operation of the user. The method of claim 1, wherein the color coordinate system used is a CIE XYZ coordinate system, a CIE xyY coordinate system, or an RGB coordinate system. Calculating and applying gains for each color for a predetermined reference color temperature through measurement; Increasing and decreasing the color value to a unit size to be changed by a user designation, and obtaining a displacement on the changed color coordinate system through measurement for each color; Selecting the reference color temperature as any other reference color temperature and repeating the steps to obtain and store the color coordinate system displacement with respect to the reference color temperature; When the user selects the reference color temperature and specifies the increase / decrease for each color, the color is changed by the increase / decrease value designated by the user based on the color coordinate system displacement for each color according to the obtained reference color temperature while displaying the screen in a corresponding state. Calculating a position on the coordinate system; And obtaining a color temperature according to a position on the color coordinate system. 8. The color temperature setting method as claimed in claim 7, wherein the color coordinate system used is a CIE XYZ coordinate system. The method of claim 7, wherein the obtaining the displacement on the changed color coordinate system through measurement for each color, Adding or subtracting color values of each of R, G, and B in a minimum unit that can be designated by a user; Measuring the changed screen through an external measuring device to obtain a positional displacement on the color coordinate system and setting it as a reference displacement according to a unit change of a corresponding color; And performing all of the above steps for each of the colors to set the displacement for each color. The method of claim 7, wherein the calculating of the position on the color coordinate system according to the color increase / decrease value designated by the user based on the displacement for each color comprises: Obtaining a new color coordinate system position according to the increase or decrease of the single color indicated by the user by substituting the increase / decrease value of the single color designated by the user into the color coordinate system position displacement relationship according to the unit increase / decrease value; And repeating the above steps for all other colors added or decreased by the user. The method of claim 7, wherein the obtaining of the color temperature according to the position on the color coordinate system comprises: obtaining color temperature information of the predetermined color coordinate system using a look-up table in which standard information on the color temperature corresponding to the coordinate position of the color coordinate system is stored. Color temperature setting method characterized in that it comprises a step. The method of claim 7, wherein the step of specifying the increase and decrease for each color, And manually increasing or decreasing the setting values for each color shown in the user interface provided by the on-screen display by a multiple of the minimum unit. And providing the color temperature obtained in the step of acquiring the color temperature according to the position on the color coordinate system on the screen as a result of the manual operation of the user. Changing a color temperature of a display image by setting a color increase and decrease for each color using an on-screen display interface; Calculating a position change of the color coordinate system due to the set increase / decrease value based on the displacement value of the color coordinate system by the unit increase / decrease value for each color in consideration of characteristics of an individual display panel; And detecting a corresponding color temperature using the calculated new color coordinate system position and providing the same to a user using the on-screen display interface. The method of claim 13, wherein the calculating of the position change of the color coordinate system by the set increase / decrease value based on the displacement value of the color coordinate system by the unit increase / decrease value for each color in consideration of individual display panel characteristics is performed. Acquiring an increase or decrease of a color increased or decreased according to the user input; The color coordinate system position displaced by the increase / decrease value by using the value previously stored in the manufacturing step by obtaining the displacement value of the color coordinate system by color after increasing and decreasing the unit by color from the position on the reference color coordinate system set through measurement. Color temperature setting and display method comprising the step of calculating. The method of claim 13, wherein the user sets the color increase / decrease value using the on-screen display interface to change the color temperature of the display image. Setting a color temperature of an image by selecting a color temperature as a reference; And acquiring the corresponding setting value by changing the color temperature of the image by the unit increment value when the user manipulates one of the colors based on the color temperature. The method of claim 15, wherein the calculating of the color coordinate system displacement value based on the unit increase / decrease value for each color comprises: The user selects a color coordinate system displacement value based on the unit increment value measured at the selected reference color temperature among the color coordinate system displacement values measured at the selectable reference color temperatures respectively and stored in the manufacturing step. And calculating a position on the new color coordinate system displaced by the increase or decrease of one color. The method of claim 13, wherein the color coordinate system used is a CIE XYZ coordinate system, a CIE xyY coordinate system, or an RGB coordinate system.

Images