TWI230788B - Method for determining calibration factor of luminance and apparatus set therefor - Google Patents

Abstract

A method for determining calibration factor of luminance and an apparatus set therefor. The apparatus set includes a standard apparatus and a luminance apparatus. The method includes the steps of: (a) measuring a standard luminance for a light source with the standard apparatus; (b) measuring a measurable luminance for the light source with the luminance apparatus; (c) determining a calibration factor of luminance in accordance with the standard luminance and the measurable luminance; (d) changing luminance of the light source and obtaining corresponding calibration factors of luminance by repeating the steps of (a), (b) and (c); and (e) determining an approximation function of luminance calibration factor and measurable luminance according to the luminance calibration factors and their corresponding measurable luminance.

Description

1230788 V. Description of the invention (1) [Technical field to which the invention belongs] The present invention relates to a method for determining a brightness correction factor and a measurement device group for implementing the method, and in particular to a method that can be determined for different brightness Method with different brightness correction factors and measurement device group implementing the method. [Previous Technology] Luminance meters currently used to measure the brightness of light sources usually have only one brightness correction factor. For example, when the measured brightness of a light source measured by luminance is 100 nits, and when the measured brightness of a measured light source is 6 0 nits, the same brightness correction factor is used as the measured brightness. The basis of brightness correction. Please refer to FIG. 1, which is a schematic diagram for explaining a conventional method for determining a brightness correction factor. The measuring device group mainly includes a standard device 10 and a luminance meter 12. Using the standard device 10, a standard brightness Ys is measured for the light source 14, and Ys is about 3 8 0 n t. In addition, a luminance meter 12 is used to measure a light source 14 to measure a measured luminance Y m, and Y m is about 4 0 n i t s. Compared with the measurement results of the luminometer 12 and the standard 10 under the same light source 14, a brightness correction factor Ky can be defined; Ky = Ys / Ym = 0.95. Then, the value of this brightness correction factor is stored in the memory of the luminance meter 12. After that, when measuring the brightness of other light sources, the luminance meter 12 will multiply the measured brightness value by a brightness correction factor of 0.9 5 to obtain the value of the standard brightness and then output. Taking the above situation as an example, the luminance meter 12 will output the standard brightness

TW1234F (Chimei) .ptd Page 7 1230788 V. The value of invention description (2) Ys = 400nitsx 0.95 = 380nits. Because the standard is quite expensive, and it takes a long time to use the standard to measure the brightness of the light source to get the standard brightness directly. Therefore, the above method is usually adopted to obtain the standard brightness of the measured light source. From the experience of using a luminance meter, it is known that due to the non-linear characteristics of the photo sensor in the luminance meter, this brightness correction factor of 0.95 is only suitable for brightness around 400nits. When the brightness of the light source is considerably greater than 4001 丨 3 (e.g. 6000114) or considerably less than 40011 丨 7 (e.g. 100nits), use this single brightness correction factor to correct the luminance meter The measured measured brightness (in order to obtain the standard brightness), the actual standard brightness cannot be obtained. [Summary of the Invention] In view of this, the object of the present invention is to provide a method for determining a brightness correction factor and a measurement device group for implementing the method. When the brightness of a light source is measured by luminance measurement, a near-actual standard can be obtained. brightness. According to the above purpose, the present invention proposes a first method for determining a brightness correction factor and a measurement device group for implementing the method. The method for determining mainly includes the following steps: (a) measuring a standard brightness for a light source; (b) measuring The light source measures the measured brightness; (c) determines the brightness correction factor from the standard brightness and the measured brightness; (d) changes the brightness of the light source and repeats steps (a), (b), (c) to obtain each Brightness correction factor; (e) According to the corresponding relationship between each brightness correction factor and each measured brightness, determine the proximity of the brightness correction factor to the measured brightness

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The convex-like relationship, and the storage of this approximation function are related to two sets of brightness, standard, and luminance meter. … To measure: to = = amount :: to get the brightness. The luminance meter can determine each brightness correction factor according to each obtained and / or quasi-redundancy, and the corresponding relationship between each brightness correction factor and each measured brightness is = 22-like function relationship, and this approximation can be stored Functional relationship.尔 产 1. The measured brightness measured here can be calculated based on this approximate function.

2 According to the above purpose, the present invention proposes a second method for determining the brightness correction factor and a measurement device group for implementing the method. This determination method includes the following steps: (a) measuring standards for a plurality of basic colored lights respectively The true G e (b) measures the measured brightness of these basic colored lights separately; (222 and the measured brightness, determine the shell correction factors corresponding to these basic colored lights; (d) according to The relationship between each brightness correction factor and each measured true luminance determines the closeness between the brightness correction factor and the measured brightness: the function-to-number relationship, and (e) the storage of this approximate function relationship. The measurement device group includes Standards and luminance meters. Standards are used to measure standard brightness. The brightness is then measured to measure the brightness. The brightness meter can determine each brightness correction factor based on each measured brightness and standard, and the brightness meter is The approximate function relationship can be determined according to the relationship between each brightness correction factor and each measured brightness, and this approximate function relationship can be stored. The measured brightness measured by the luminance meter afterwards can be corrected according to this approximate function relationship . "According to the above purpose, the present invention proposes a third method for determining a brightness correction factor and a measurement device group for implementing the method.

TW1234F (Chimei) .ptd Page 9 1230788 V. Description of the invention (4) Includes ^ f】 广 骤 · (&) For the light source in a brightness range, measure the standard brightness 1 (b) For the light source at this brightness Range, measure the measured brightness; (c) uf 焭 and the measured brightness to determine the brightness correction factor; (d) repeat the steps (a), (b), (c) at each brightness, Each degree correction factor is obtained in each brightness range; and (e) each brightness correction factor is stored. The measuring device group 'includes a standard and a luminance meter. The standard device is used to measure the standard brightness. The brightness meter is used to measure the brightness. The luminance meter can determine each brightness correction factor in each brightness range 'according to each measured brightness and each standard brightness, and can store each brightness correction factor. The measured brightness measured by the luminance meter can be corrected according to each brightness correction factor. According to the above purpose, the present invention further proposes a fourth method for determining a brightness correction factor and a measurement device group implementing the method. The method for determining mainly includes the following steps: (a) the brightness of a light source in a brightness range, Measure the standard brightness; (b) measure the measured brightness of the light source in the brightness range; (c) determine the brightness correction factor from the standard brightness and the measured brightness; (d) in this brightness range, Change the brightness of the light source, and repeat steps (a), (b), (c) to obtain each brightness correction factor; (e) In this brightness range, determine according to the corresponding relationship between each brightness correction factor and each measured brightness' The approximate functional relationship between the brightness correction factor and the measured brightness; (f) Repeat steps (a), (b), (c), (d), and (e) in the range of each party degree to determine the approximate function relationship; And (g) storing each approximate function relationship. ; ^ This measurement set I set includes standard and luminance meter. The standard is used to measure the standard brightness, and the luminometer is used to measure the measured brightness. The luminance meter can determine the correction of each party's brightness in each range of brightness according to the measured brightness and standard brightness.

TW1234F (Chimei) .ptd Page 10 1230788 V. Description of the invention (5) —- — — factor, and the luminance meter can be used in each brightness range, according to the relationship between each friend and each measured brightness, determine the approximate functions == The positive factor stores the approximate functional relationships. Later measured by the luminometer = storable It can be corrected according to the approximate function relationship. Do n’t forget, in order to make the above-mentioned objects, features, and advantages of the present invention ^ ΤΓ-V tl4r 6 texts are obviously easy to repeat. The following is a description of the preferred embodiments and the accompanying drawings. ° [Embodiment] The present invention is described in detail with preferred embodiments. However, these examples do not limit the scope of the present invention. The second embodiment herein is only a method for determining a brightness correction factor in the spirit of the invention of the present invention and a measurement device group for implementing the method. In the following, the technical features of the present invention will be described in detail first. (1) The approximate functional relationship of the i-degree range without segmentation: Please refer to FIG. 2A, which shows a flowchart of a method for determining a brightness correction factor in the first embodiment of the present invention. The method for determining the brightness correction factor mainly includes the following steps. First, in step 200, a method for determining the brightness correction factor is started. Then, in step 2005, the standard brightness 10 and the brightness meter 12 in the first figure are used to measure the standard brightness Ys and the measured brightness Ym at a certain brightness for the light source 14 respectively. Next, in step 210, a brightness correction factor Ky is determined from the measured standard brightness YS and the measured brightness Ym by Ys / Ym. After that, at step

1230788 V. Description of the invention (6) In step 21 5, the brightness of the light source 14 is changed, and steps 2 05 and 21 0 are repeated to obtain a brightness correction factor Ky corresponding to different measured brightness Ym under different brightness. . As shown in Figure 2B, the distribution of the brightness correction factor Ky at different measured brightnesses Ym. Next, in step 220, an approximate function relationship between the brightness correction factor Ky and the measured brightness Ym is determined according to the corresponding relationship between each brightness correction factor Ky and each measured brightness Ym. As shown in Figure 2C, a functional relationship is selected to approximate the distribution in Figure 2B. This functional relationship can be selected as the polynomial function shown in the dotted line in Figure 2C, or any other function that can approximate the distribution in Figure 2B. In this way, this approximate function relationship can be used to determine a more realistic brightness correction factor Ky corresponding to the measured brightness Ym. Then, in step 2 2 5, the approximate function relationship is stored. Finally, in step 230, the method for determining the brightness correction factor is ended. The method for determining the brightness correction factor described above can be implemented by a measurement device group as shown in FIG. This measuring device group includes a standard device 10 and a luminance meter 12. The standard device 10 is used to measure the standard brightness γ s, and the luminance meter 12 is used to measure the measured brightness Ym. Luminance meter 12 can determine each brightness correction factor Ky according to each measured brightness Ym and each standard brightness Ys. In addition, the luminance meter 12 can determine an approximate function relationship as indicated by a dashed line in FIG. 2C according to the corresponding relationship between each brightness correction factor Ky and each measured brightness Ym, and the approximate function relationship can be stored. The measured brightness γ m measured by the 'brightness meter 12' can be corrected according to this approximate function relationship. As can be seen from the above, the inventive spirit of the present invention is based on the measurement of brightness

TW1234F (Chi Mei) .ptd Page 12 1230788, description of the invention (7) When measuring different measured brightness, different brightness correction factors should be used. In this way, the actual and accurate brightness can be obtained under different measured brightness. ^ ^ In the above method, the approximate function relationship between the brightness correction factor Ky and the measured brightness Ym is determined by the correspondence relationship between the brightness correction factor "and the measured brightness Ym. Therefore, as long as sufficient correspondence is obtained, the approximate function The relationship is based on this "quotation 2:" is another method to determine the approximate function relationship using the principles in the above method. (2) Approximate function relationship: Please refer to Figure 3A, which is shown It is a flowchart of the method for determining the brightness correction factor in the second embodiment of the present invention. The method for determining the brightness correction factor mainly includes the following steps. First, in step 300, the determination of the brightness correction factor is started. Then, in step 305, the target & quasi-brightness Ys and the measured brightness Ym are measured for a plurality of 2 natural colors, such as white light, green light, red light and blue light.

Next, in step 310 ', the brightness correction factors Ky corresponding to the beauty light such as white light, green light, red light, and blue light are determined from each of the standard brightness Ys and each of the measured brightness Ym'. As shown in Figure 3B, it is the distribution of the measured brightness Ym relative to the brightness correction factor Ky for the two basic white, green, red, and blue lights. W, G, R, and B in the figure represent white, green, red, and blue light, respectively. After V, in step 315, according to each brightness correction factor. And each test

1H TW1234F (Chimei) .ptd Page 13 1230788 The corresponding relationship between the degree Ym is determined, and the approximate function relationship between the brightness correction factor and the measured brightness is determined. The method is the same as that of the first embodiment. As shown in FIG. 3C, a functional relationship is selected to approximate the distribution in FIG. 3B. This functional relationship can be a polynomial function as shown by the dashed line in Figure 3C, or any other function that can approximate the distribution in Figure 3B. Then, in step 3 2 0, the approximate function relationship is stored. Finally, in step 3 2 5, this method for determining the second brightness correction factor is ended. As can be seen from the above, the determination method for implementing this brightness correction factor can be passed through a measuring device group composed of a standard device 10 and a luminance meter 2 as shown in FIG. 1. The standard 10 is used to measure the standard brightness Ys of the four basic color lights of white, green, red, and blue, and the luminometer 12 is used to measure the measured brightness Ym of the four basic color lights. The luminance meter 12 can determine the brightness correction of the four basic color lights of white, green, red, and blue according to the measured brightness Ym and each standard brightness Ys. Moreover, the luminance meter 12 can be corrected according to these four brightness As a result of the corresponding relationship of the brightness Ym, it is determined as shown in Fig. 3C that the quasi-like function relationship is calculated, and this approximate function relationship can be stored. The measured luminance Ym, as shown in the figure below, can be calculated according to this < ' U-function relationship to carry out Generally, the basic color light emitted by a general display is described as four basic color lights of white, green, red, and blue. The other side is the reflected natural light of the above device, which can also be a printed matter or a reflective display, and the above-mentioned base light. . ,,,, No Please refer to Figure 3D.

TW1234F (Chi Mei) .ptd 1230788

V. Description of the invention (9) The intention of the reflected light of the brush. The printed matter 3 3 0 or the reflective display is subjected to reflection light 340. Generally speaking, the basic color light of the reflected light 3 4 0 from printed matter 3 3 0 or reflective display is white light, yellow transmission standard 3 2 7 and luminance meter, which can be divided into a standard light source 3 3 5 Through the illumination of a standard light source 3 35, the reflected reflected light 3 4 0, this million light, purple red light and aqua blue light. The standard brightness Ys and measured brightness Ym of each of the basic color lights such as white, yellow, magenta, and aqua blue are measured through transmission. According to the four-color array correction theory (the〇ry 〇f four color matrix coirirection), a colorimeter that can measure brightness at the same time is used to perform four-color correction for four colors of white, red, green, and red on a display. Or, a colorimeter that can measure brightness at the same time will be used for four-color correction for the four colors of white, yellow, magenta, and aqua blue in a print or reflective display. This colorimeter can get extremely accurate color measurement within the color gamut range of this display. In line with this theory, when measuring white, green, red, blue, or white, yellow, magenta, and aqua blue light, it is equivalent to measuring light sources with different brightness. Therefore, according to the distribution as shown in FIG. 3B, the dotted line as shown in FIG. 3C can be selected as an approximate functional relationship. In the first and second embodiments described above, the determination of the approximate functional relationship is based on the brightness correction factor Ky distributed throughout the measured brightness Ym range. The following two methods of determining the brightness correction factor are to distinguish the entire measured brightness range to obtain the brightness correction factor belonging to the individual measured acceptance range, or the brightness correction factor and the measured brightness. Approximate functional relationship

TW1234F (Chimei) .ptd Page 15 1230788 V. Explanation of the invention (ίο) (3) Brightness correction factor of brightness range segmentation: Please refer to FIG. 4A, which shows the brightness correction factor of the third embodiment of the present invention Flow chart of the decision method. The method for determining the brightness correction factor mainly includes the following steps. First, the method for determining the brightness correction factor is started in step 400 '. Then, in step 405, arbitrarily select a brightness with the standard device 10 and the luminance meter 12 in the first figure, and the light source 14 under a certain brightness range, to measure the standard brightness γ s and Wait for Ym °, and then, in step 4 10, the standard brightness measured in this way. With the measured brightness Ym, Ys / Ym determines the brightness correction factor Ky for this brightness range. Then, in step 415, steps 40 5 and 410 are repeated for each brightness range to obtain a brightness correction factor Ky in each brightness range. As shown in Figure 4B, different brightness correction factors have different brightness correction factors Ky for different measured brightness ranges. The example shown in the figure divides the measured brightness ¥ 111 into four brightness ranges (this example is four brightness ranges of 0 ~ 100nits, i00nits ~ 200nits, 200nits ~ 300nits, and 300nits ~ 700nits). In the brightness range, a brightness correction factor Ky can be determined respectively. The selection and division of the number of brightness ranges is not limited. As long as the selected method is used, the obtained brightness correction factor 0 can be representative within the selected brightness range. Finally, in step 42, the method for determining the brightness correction factor is ended. The above-mentioned method for determining the TO degree correction factor can be implemented as a measurement device group having a standard 10 and a luminance meter 12 as shown in FIG. The standard Is 1 0 is used to measure the standard brightness γ s, and the luminance meter 2 is used to measure the measured brightness.

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V. Description of the invention (11) Degree Ym 〇 The luminometer 1 2 can be used in each brightness range, according to the measured brightness Ym and the standard brightness Ys, to determine the brightness correction factors for each brightness range ^

Ky, and as shown in Fig. 4C, the dotted line shows the corresponding brightness correction factor Ky 'in the individual range, and the luminance meter 12 can store all the measured brightness Ym in a certain brightness range. , All use the same representative brightness correction factor Ky for correction. After that, the measured brightness Ym measured by the luminance ancient Shigong 2 can be corrected according to these brightness correction factors $ K ° y. The advantage of using the above method to determine the brightness correction factor is that the measured exemption range can be segmented first, and then a smaller measured brightness range can be used to select only a representative brightness correction. The factor Ky is used as the brightness correction factor in this measured brightness range. This not only saves the time required to determine multiple points to determine the approximate function relationship. And to a certain extent, the brightness correction factor determined from this Therefore, at least a certain degree of accuracy can be maintained. Compared with the conventional method that does not segment at all, a fixed brightness correction factor Ky is used, and the brightness correction factor Ky obtained by this method is closer to reality. 4) The approximate functional relationship of the brightness range segmentation: Please refer to FIG. 5A, which shows a flowchart of a method for determining a brightness correction factor in the fourth embodiment of the present invention. The method for determining the brightness correction factor mainly includes The following steps: First, in step 500, start the light

TW1234F (Chimei) .ptd Page 17 1230788 V. Description of the invention (12) The method for determining the degree correction factor. Then, in step 5 05 ', the standard brightness Ys and the measured brightness Ym are respectively measured for a certain brightness of the light source 14 in a certain brightness range using the standard 10 and the luminance meter 12 in the first figure. Next, in step 510, the measured standard brightness Ys and the measured brightness Ym are determined by Ys / Ym for the brightness correction factor Ky at this brightness. After that, in step 5 15, in the brightness range, change the brightness of the light source, and repeat steps 5 5 and 5 1 0 to obtain several brightness correction factors Ky in the brightness range. Then, in step 5 2 0, under this measured brightness range, an approximation of the party degree correction factor K y and the measured brightness Y in is determined according to the correspondence between each brightness correction factor Ky and each measured brightness Ym. Functional relationship. Then, in step 525, steps 505, 510, 515, and 5 2 0 are repeated to determine the approximate function relationships for each measured brightness range. Then, in step 530, these approximate function relationships are stored. Finally, in step 5 35, the method for determining the brightness correction factor is ended.

As shown in Figure 5B, the brightness correction factor Ky corresponds to the distribution of the measured brightness Ym in each brightness range. In Figure 5C, a function relationship is selected in each measured degree range to approximate the distribution in Figure 5 β. This functional relationship can be selected as a polynomial function 'shown by the dashed line in Fig. 5C or any other function that can approximate the distribution in Fig. 5B. In this way, the approximate function relationship can be used to determine a more realistic brightness correction factor Ky corresponding to the measured brightness Ym. The examples shown in the above Figures 5B and 5C divide the measured brightness Ym into three brightness ranges (in this example, 〇 ~ 100〇ni ts, 〇〇Ni ts ~

1230788 V. Description of the invention (13) Three brightness ranges of 300 nits and 300 nits to 700 nits). The selection and division of the number of brightness ranges is not limited. As long as the method is selected, the obtained brightness correction factor Ky can be made close to the actual Ky value. The above-mentioned method for determining the brightness correction factor can be implemented as a measuring device group having a standard device 10 and a luminance meter 2 as shown in FIG. 1. The standard 10 is used to measure the standard brightness γ s, and the luminosity meter 12 is used to measure the measured brightness Y ID. The luminosity meter 12 can be used at each brightness standard brightness Ys. In Fig. 4C, the dotted line approximates the functional relationship. Then, the luminance meter i 2 is then calibrated by a function-like relationship measured by the luminance meter 12. It can be known from the foregoing that the measurement device group implementing the method according to the present invention has a correction factor. Therefore, measuring the degree of the device can match the actual brightness with a more accurate brightness value. The range is based on the relationship between the measured brightness Ym and the approximate function of each party's range. These are shown in the individual measured brightness ranges and these approximate functional relationships can be stored. The measured brightness Ym can be corrected according to the determination method of the near-redundancy board positive factor and the measured brightness correction factor measured by a luminance meter that is more in line with the actual brightness group =, to obtain "The invention described in the instructions above has been implemented to limit the invention. Anyone who is familiar with this technique, but its spirit and scope β, can make all kinds of changes; do, door; no Departure from the scope of protection of the present invention shall be treated as the attached Shenshe A /, / decoration. Therefore, the definition of the 月 -month patent stem of the present invention shall prevail.

1230788 Schematic description [Schematic description] Figure 1 is a schematic diagram illustrating the conventional method for determining the brightness correction factor. FIG. 2A shows a flowchart of a method for determining a brightness correction factor according to the first embodiment of the present invention. Figure 2B shows the distribution of the brightness correction factor Ky at different measured brightnesses Ym. Figure 2C shows a functional relationship that approximates the distribution in Figure 2B. FIG. 3A shows a flowchart of a method for determining a brightness correction factor according to the second embodiment of the present invention. Figure 3B shows the distribution of the measured brightness Ym relative to the brightness correction factor Ky for white, green, red, and blue light. Figure 3C shows a functional relationship that approximates the distribution in Figure 3B. Figure 3D is a schematic diagram of measuring the reflected light of a printed matter with a standard and a luminance measurement. FIG. 4A is a flowchart of a method for determining a brightness correction factor according to a third embodiment of the present invention. Figure 4B shows different measured brightness ranges with different brightness correction factors Ky. Figure 4C shows the different measured brightness ranges corresponding to Figure 4B, with a fixed brightness correction factor. FIG. 5A shows a flowchart of a method for determining a brightness correction factor according to the fourth embodiment of the present invention. Figure 5B shows the brightness correction factor Ky versus TW1234F (Chimei) .ptd Page 20 1230788 for each brightness range. The diagram briefly illustrates the distribution of brightness Y m that should be measured. Fig. 5C shows a function relationship that approximates the distribution in Fig. 5B in each measured brightness range. Description of figure symbols 10, 327: standard device 12: luminance meter 14: light source 3 3 0: printed matter 3 3 5: standard light source 3 4 0: reflected light

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Claims (1)

1230788 VI. Scope of patent application 1. A method for determining the Sanskrit correction factor includes the following steps: (a) measuring a standard brightness of a light source; (b) measuring a measured brightness of the light source; (c) A tolerance correction factor is determined from the standard brightness and the measured brightness; ~ X ^ (d) Change the brightness of the light source, and repeat steps (a), (b), and (C) to obtain each of the brightness corrections Factors; and C e) determine an approximate functional relationship between a brightness correction factor and the measured brightness according to the corresponding relationship between each of the brightness correction factors and each of the measured brightness. 2. The method described in item 1 of the scope of patent application, wherein after step (e), it further includes (f) storing the approximate function relationship. 3. A measuring device group of a method for determining the method of claim No. 1 in the scope of the patent application, including: a standard device for measuring the standard brightness; and a long-term β Γ glow meter for measuring the measurement. Brightness, the brightness meter can determine according to 4 / /, u degree and each of the standard brightness, to determine each of the brightness correction 丨 The calculation of the degree ϊ T determines the approximate function relationship according to each of the brightness correction factors and each of the measured; correspondences. $ 辉 4 translated the measurement device group described in item 3 of the patent scope, where a == and 丨 can be used to store the approximate function relationship, and then the brightness, ~;: the measured brightness, Can be based on this approximation 1230788 6. Scope of Patent Application (a) Measure a standard brightness for a plurality of basic color lights; (b) Measure a measured brightness for each of the basic color lights; (c) Determine from each of the standard brightness and each of the measured brightness A brightness correction factor corresponding to each of the basic colored lights; and (d) determining an approximate functional relationship between a brightness correction factor and the measured brightness according to the correspondence between the brightness correction factors and the measured brightness'. 6. The method of determination according to item 5 of the scope of patent application, wherein the basic color lights are white light, green light, red light and blue light. 7. The method of determination according to item 5 of the scope of patent application, wherein the basic color light is emitted by a display. 8. The method of determination according to item 5 of the scope of patent application, wherein the basic color lights are white light, yellow light, purple red light, and aqua blue light. 9 · The method of determination as described in item 5 of the scope of patent application, wherein the basic colored lights are reflected light on a printed matter, and the printed matter is irradiated by a standard light source to generate the reflected light. 10. The method for determining according to item 5 of the scope of patent application, further comprising (e) storing the approximate function relationship after step (d). 11. A measuring device group for implementing the method for determining the fifth item of the scope of patent application, comprising: a standard device for measuring the standard brightness; and a brightness leaf 'for measuring the measured brightness and the brightness The meter system can determine each of the brightness correction factors according to each of the measured brightness and each of the standard brightness, and the luminance meter can also depend on each of the brightness correction factors and each of the measured brightness. 1230788 6. The relationship between the scope of patent application and the approximate function relationship is determined. 12. The measuring device set according to item 11 of the scope of application for a patent, wherein the luminance meter can be used to store the approximate functional relationship, and the measured brightness measured by the luminance meter can be based on the approximation Functional relationships are corrected. 13. · A method for determining a brightness correction factor includes the following steps: (a) measuring a standard brightness for a light source in a brightness range; (b) measuring a measurement for the light source in the brightness range Obtain the brightness; (c) determine a brightness correction factor from the standard brightness and the measured brightness; and (d) repeat steps (a), (b), (c) for each of the brightness ranges to obtain Each brightness correction factor for each brightness range. 14. The method for determining according to item 13 of the scope of patent application, wherein after step (d), the method further includes (e) storing each of the brightness correction factors. 15. · A measuring device group for implementing the determination method of item 13 of the scope of patent application, comprising: a standard device for measuring the standard brightness; and a luminance meter for measuring the measured brightness and the brightness The system can determine each of the brightness correction factors in each of the brightness ranges according to each of the measured brightness and each of the standard brightness. 16. The measuring device group as described in item 15 of the scope of patent application, wherein the luminance meter can be used to store each of the brightness correction factors, and then the measured luminance measured by the luminance meter can be based on Brightness correction factor TW1234F (Chimei) .ptd Page 24 1230788 6. Scope of Patent Application Correction. 17. A method for determining a brightness correction factor, including the following steps: (a) measuring a standard brightness for a light source in a brightness range; (b) measuring the brightness of the light source in the brightness range To measure a measured brightness; (c) determine a brightness correction factor from the standard brightness and the measured brightness; (d) change the brightness of the light source in the brightness range, and repeat steps (a), (B), (c) to obtain each of the brightness correction factors; (e) in the brightness range, a brightness correction factor and the measured brightness are determined according to the correspondence between each brightness correction factor and each measured brightness (F) Repeat steps (a), (b), (c), (d), and (e) for each of the brightness ranges to determine each of the approximate function relationships. 18. The method for determining according to item 17 of the scope of patent application, wherein after step (f), the method further includes (g) storing each approximate function relationship. 19. A measuring device group for implementing the method for determining item 17 of the scope of patent application, comprising: a standard device for measuring the standard brightness; and a luminance meter for measuring the measured brightness and the brightness The system can determine each of the brightness correction factors in each of the brightness ranges, according to the measured brightness and each of the standard brightness, and the brightness meter can be in each of the brightness ranges. TW1234F (Chimei) .ptd Page 25 1230788 6. Scope of patent application According to the relationship between each brightness correction factor and each measured brightness, each approximate function relationship is determined. 20. The measuring device group as described in item 19 of the scope of patent application, wherein the luminance meter can be used to store each approximate function relationship, and then the measured brightness measured by the luminance meter can be The correction is performed according to each of the approximate function relationships. TW1234F (Chi Mei) .ptd Page 26