JP2021139818A - Luminance meter state determination system, luminance meter state determination device, and program - Google Patents

Abstract

To provide a luminance meter state determination system or the like capable of determining a state of a plurality of luminance meters while performing measurement on a measuring object such as a display without stopping a production process or the like for the plurality of luminance meters incorporated in a production process or the like.SOLUTION: A luminance meter state determination system includes: a plurality of luminance meters 1; a reference luminance meter 2; comparison means 46 for comparing measured results of measuring objects by plurality of luminance meters 1 with the measured results of the measuring objects by the reference luminance meter 2, which are selected from among the measuring objects whose measured values are measured by the luminance meters 1; and determination means 47 for determining whether or not to adjust the luminance meters 1 based on a result of comparison by the comparison means 46.SELECTED DRAWING: Figure 2

Description

The present invention relates to a state determination system, a state determination device, and a program for determining the state of a luminance meter when measuring the luminance of a measurement object such as a plurality of displays using, for example, a plurality of stimulation value type luminance meters. ..

It is possible to maintain the quality of the display by measuring and monitoring the brightness (spectral radiation characteristics) of the display produced by using a plurality of stimulation value type luminance meters in, for example, a display factory, which is the object to be measured. It has been.

However, the stimulus value type luminance meter causes an error from the true measured value due to the error of the spectral response degree of the sensor or the like, and the error generally varies from stimulus value type luminance meter to each stimulus value type luminance meter. That is, it has an instrumental error. Therefore, in order to reduce the instrumental error of the stimulus value type luminance meter, the reference value is acquired in advance by the spectral luminance meter by the spectroscopic color measurement method using the reference light source, and the stimulus value luminance meter is adjusted to the reference value. The output value of the total is corrected.

In this case, in order to prepare stable measurement conditions and reduce measurement errors as much as possible, the stimulation value type luminance meter is moved from the normal operating environment, and the measurement of the reference light source is performed under stable environmental conditions. Therefore, there arises a problem that it takes time and effort to transfer the stimulus value type luminance meter and measure the reference light source.

To solve this problem, it is conceivable to install a reference light source near each stimulus value type luminance meter, but since the uncertainty of the plurality of reference light sources themselves increases, an increase in instrumental error occurs.

In Patent Document 1, even if the measuring instruments used for white balance adjustment are different between a plurality of production bases and the development department, the deviation of the measuring instruments is calibrated to provide more accurate measurement data. A calibration system has been proposed to provide.

Specifically, the base server 23 receives the first measurement data by the spectral radiation brightness meter 12 and the second measurement by the color analyzer 22 with respect to the standard sample 11 whose white balance is adjusted by the spectral radiation brightness meter 12. The calibration data based on the deviation from the data is calculated, and the base measurement data and the calibration data when the white balance is adjusted by the color analyzer 22 for the product 21 are uploaded to the center server 30. The center server 30 stores the base measurement data and the calibration data uploaded from the base server 23 for each production base, and calibrates the stored base measurement data with the calibration data in response to a request from the terminal device 13. The base measurement data after calibration is transmitted to the terminal device 13.

Japanese Unexamined Patent Publication No. 2014-87037

However, the technique described in Patent Document 1 needs to periodically monitor and correct the deviation of the measurement data between the color analyzer and the reference luminance meter using a standard sample, and is once incorporated into the production process of the object to be measured. It is troublesome to take out the color analyzer and the stimulation value type luminance meter and perform this work, and it is not efficient because the production process is stopped during the adjustment of the color analyzer.

The present invention has been made in view of such a technical background, and for a plurality of luminance meters incorporated in a production process or the like, measurement of a measurement object such as a display without stopping the production process or the like. It is an object of the present invention to provide a luminance meter state determination system, a luminance meter state determination device, and a program capable of determining the state of a plurality of luminance meters while performing the above.

The above object is achieved by the following means.
(1) Measurement selected from a plurality of luminance meters, a reference luminance meter, a measurement result of a measurement object by the plurality of luminance meters, and a measurement object whose measurement value is measured by the luminance meter. Brightness characterized by comprising a comparison means for comparing a measurement result of an object with the reference luminance meter, and a determination means for determining the necessity of adjustment of the luminance meter as a result of comparison by the comparison means. Measurement status judgment system.
(2) A calculation means for calculating the variation in the measured value difference from the reference luminance meter is provided for each of the plurality of luminance meters based on the comparison result by the comparison means, and the determination means is calculated by the calculation means. The luminance meter state determination system according to item 1 above, which determines that adjustment is necessary for a luminance meter in which the variation in the measured value difference exceeds the permissible value.
(3) The luminance meter state determination system according to item 2 above, wherein the allowable value is set to a value larger than the variation in the measured values of the object to be measured by the reference luminance meter.
(4) The luminance meter state determination system according to item 2 above, wherein the allowable value is set by obtaining uncertainty from the measured value difference by a statistical method.
(5) When it is determined by the determination means that the adjustment of the luminance meter is unnecessary and it is necessary to change the correction matrix, the measurement results of the plurality of measurement objects by the luminance meter and the reference luminance meter are used. Described in any one of the above items 1 to 4, further comprising a generation means for generating a new correction matrix from the measurement result and a correction means for correcting the output value using the correction matrix generated by the generation means. Luminance meter status judgment system.
(6) The luminance meter state determination system according to item 5 above, wherein the generation means generates a new correction matrix by selecting from a plurality of correction matrices based on measurement results of a plurality of measurement objects.
(7) The luminance meter state determination system according to item 5 above, wherein the generation means generates a new correction matrix by averaging or interpolation approximation from a plurality of correction matrices based on measurement results of a plurality of measurement objects.
(8) Acquire the measurement results of the measurement object by a plurality of luminance meters, and obtain the measurement results of the measurement object selected from the measurement objects whose measurement values are measured by the luminance meters by the reference luminance meter. The acquisition means to be acquired, the comparison means for comparing the measurement result by the luminance meter acquired by the acquisition means and the measurement result by the reference luminance meter, and the comparison result by the comparison means, the necessity of adjusting the luminance meter is determined. A luminance meter state determination device including a determination unit for determination.
(9) A calculation means for calculating the variation in the measured value difference from the reference luminance meter is provided for each of the plurality of luminance meters based on the comparison result by the comparison means, and the determination means is calculated by the calculation means. The luminance meter state determination device according to item 8 above, which determines that adjustment is necessary for a luminance meter in which the variation in the measured value difference exceeds the permissible value.
(10) The luminance meter state determination device according to item 9 above, wherein the allowable value is set to a value larger than the variation in the measured value of the object to be measured by the reference luminance meter.
(11) The luminance meter state determination device according to item 9 above, wherein the allowable value is set by obtaining uncertainty from the measured value difference by a statistical method.
(12) When it is determined by the determination means that the adjustment of the luminance meter is unnecessary and it is necessary to change the correction matrix, the measurement results of the plurality of measurement objects by the luminance meter and the reference luminance meter are used. Item 8. Luminance meter status judgment device.
(13) The luminance meter state determination device according to item 12 above, wherein the generation means generates a new correction matrix by selecting from a plurality of correction matrices based on measurement results of a plurality of measurement objects.
(14) The luminance meter state determination device according to item 12 above, wherein the generation means generates a new correction matrix by averaging or interpolation approximation from a plurality of correction matrices based on measurement results of a plurality of measurement objects.
(15) The measurement result of the measurement object by a plurality of luminance meters is acquired, and the measurement result by the reference luminance meter of the measurement object selected from the measurement objects whose measurement values are measured by the luminance meter is obtained. The acquisition step to be acquired, the comparison step for comparing the measurement result by the luminance meter acquired by the acquisition step and the measurement result by the reference luminance meter, and the comparison result by the comparison step, the necessity of adjusting the luminance meter is determined. A decision step and a program for causing a computer to execute.
(16) Based on the comparison result by the comparison step, the computer is further executed to calculate the variation of the measured value difference from the reference luminance meter for each of the plurality of luminance meters, and in the determination step, the determination step is performed. The program according to item 15 above, which determines that adjustment is necessary for a luminance meter in which the variation in the measured value difference calculated in the calculation step exceeds the permissible value.
(17) The program according to item 16 above, wherein the permissible value is set to a value larger than the variation in the measured value of the object to be measured by the reference luminance meter.
(18) The program according to item 16 above, wherein the allowable value is set by obtaining uncertainty from the measured value difference by a statistical method.
(19) When it is determined by the determination step that the adjustment of the luminance meter is unnecessary and it is determined that the correction matrix needs to be changed, the measurement results of the plurality of measurement objects by the luminance meter and the reference luminance meter are used. Any one of items 15 to 18 above, which causes the computer to further perform a generation step of generating a new correction matrix from the measurement results and a correction step of correcting the output value using the correction matrix generated in the generation step. The program described in.
(20) The program according to item 19 above, in which in the generation step, a new correction matrix is generated by selecting from a plurality of correction matrices based on measurement results for a plurality of measurement objects.
(21) The program according to the previous item 19 in which in the generation step, a new correction matrix is generated by averaging or interpolation approximation from a plurality of correction matrices based on measurement results for a plurality of measurement objects.

According to the inventions described in the preceding paragraphs (1), (8) and (15), the measurement result of the object to be measured by a plurality of brightness meters and the measurement object whose measured value is measured by the brightness meter are selected. Since the measurement result of the measured object to be measured by the reference luminometer is compared and the comparison result determines the necessity of adjusting the luminometer, the luminometer is measured while measuring a plurality of measurement objects on a production line or the like. It is possible to determine the necessity of adjustment of. Therefore, it is not necessary to stop the production process or the like for the measurement of the standard sample as in the case of periodically monitoring and correcting the deviation of the measurement data between the luminance meter and the standard luminance meter using the standard sample. The decrease in efficiency can also be suppressed.

According to the inventions described in the preceding paragraphs (2), (9) and (16), a plurality of measurement results of an object to be measured by a plurality of luminance meters are compared with the measurement results of a reference luminance meter. For each luminance meter, the variation in the measured value difference from the reference luminance meter is calculated, and it is determined that the luminance meter in which the variation in the measured value difference exceeds the permissible value needs to be adjusted.

According to the inventions described in the preceding paragraphs (3), (10) and (17), the permissible value is set to a value larger than the variation in the measured value of the object to be measured by the reference luminance meter, and therefore the certainty is high. Judgment can be made.

According to the inventions described in the preceding paragraphs (4), (11) and (18), the allowable value is set by obtaining the uncertainty from the measured value difference by a statistical method, so that a highly reliable determination is made. be able to.

According to the inventions described in the preceding paragraphs (5), (12) and (19), when it is determined that the luminance meter adjustment is unnecessary and it is determined that the correction by the correction matrix is necessary, the luminance of a plurality of measurement objects is determined. A new correction matrix is generated from the measurement result by the meter and the measurement result by the reference luminance meter, and the output value is corrected by using the generated correction matrix.

According to the inventions described in the preceding paragraphs (6), (13) and (20), a new correction matrix is generated by selecting from a plurality of correction matrices based on the measurement results for a plurality of measurement objects. NS.

According to the inventions described in the preceding paragraphs (7), (14) and (21), a new correction matrix is generated by averaging or interpolation approximation from a plurality of correction matrices based on measurement results for a plurality of measurement objects. Will be done.

It is a figure which shows the schematic structure of the production process of the measurement object to which the luminance meter state determination system which concerns on one Embodiment of this invention is applied. It is a block diagram which shows the structure of the luminance meter state determination apparatus which concerns on one Embodiment of this invention. It is a graph which shows the state of the time-dependent change of the luminance meter when the same reference light source is measured by the luminance meter and the reference luminometer at different times. It is a graph which shows the change of the Y value when the measurement object is measured by the luminance meter and the reference luminance meter. It is a graph which shows the measured value difference of the Y value when a plurality of measurement objects are measured by one luminance meter and one reference luminance meter. (A) is a graph showing the measured value difference of the Y value when a plurality of measurement objects are measured with three luminance meters and one reference luminance meter, and (B) is a graph showing the frequency of the measured value difference. It is a figure represented by a histogram. (A) and (B) are diagrams for explaining a method of determining a permissible value of variation. It is a figure for demonstrating another method of determining the permissible value of variation. It is a figure for demonstrating the method of generating a new correction matrix. It is a flowchart which shows the process of determining the state change of the luminance meter executed by the luminance meter state determination apparatus.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a diagram showing a schematic configuration of a production process of a measurement object to which the luminance meter state determination system according to the embodiment of the present invention is applied.

In FIG. 1, the luminance meter state determination system includes a plurality of stimulation value type luminance meters 1 and one reference luminance meter 2.

Each stimulus value type luminance meter 1 is incorporated into the production process of the measurement object 3, and sequentially measures the measurement object 3 conveyed by a transfer device (not shown). In this embodiment, the case where the measurement object 3 is a display is shown, but the measurement object 3 is not limited to the display. In the following description, the object to be measured is also referred to as a display.

Further, in this embodiment, the display 3 is once measured by each stimulus value type luminance meter 1, and then the light emitting state is adjusted, and the production process shown in FIG. 1 is the stimulus value type after the adjustment. This is a process in which the luminance meter 1 is used to perform inspection and measurement again before shipment.

In this embodiment, the reference luminance meter 2 is configured by a spectral luminance meter by a spectrophotometric method. The reference luminance meter 2 measures the display 3 selected from the displays 3 whose luminance has been measured by each stimulus value type luminance meter 1. Therefore, the number of displays 3 whose brightness is measured by the reference luminance meter 2 is smaller than the total number of displays 3 measured by each stimulation value type luminance meter 1.

FIG. 2 is a block diagram showing a configuration of a luminance meter state determination device 4 according to an embodiment of the present invention. The state determination device 4 is composed of a personal computer including a storage unit 43 including a CPU 41, a RAM 42, a hard disk device, and the like.

Further, as shown in FIG. 2, the luminance meter state determination device 4 includes an input unit 44, a variation calculation unit 45, a comparison unit 46, a determination unit 47, a correction matrix generation unit 48, and a correction unit 49. However, these may be configured by the function of the CPU 41.

The input unit 44 inputs and acquires the measured values of each stimulus value type luminance meter 1 and the reference luminance meter 2. The input measured value is stored in the storage unit 43 in association with the type of the stimulus value type luminance meter 1, the identification information of the display 3, and the like. If the display 3 has a memory capable of storing the measured value and the measured value is stored in the memory at the time of measurement by each stimulus value type brightness meter 1 and the reference brightness meter 2, the input unit 44 is stored in the memory. The measured value may be obtained by reading from.

The variation calculation unit 45 calculates the variation of the measured value difference from the reference luminance meter 2 for each stimulation value type luminance meter 1.

The comparison unit 46 compares the variation of each stimulus value type luminance meter 1 calculated by the variation calculation unit 45 with the permissible value.

The determination unit 47 determines the necessity of adjustment for each stimulus value type luminance meter 1 based on the comparison result by the comparison unit 46.

The correction matrix generation unit generates a new correction matrix when it is determined as a result of the determination by the determination unit that the numerical correction of the stimulus value type luminance meter 1 can be applied.

The correction unit corrects the output value of the stimulus value type luminance meter 1 by using a correction matrix (a new correction matrix when a new correction matrix is generated).

Next, a specific state determination process executed by the luminance meter state determination device 4 will be described.

FIG. 3 shows a change over time of the stimulus value type luminance meter 1 when the same reference light source is measured at different times with the stimulus value type luminance meter 1 and the reference luminance meter 2. It is a graph and illustrates the change of the Y value. In this example and subsequent examples, CA-410 manufactured by Konica Minolta Co., Ltd. is used as the stimulation value type luminance meter 1, and CS-2000 also manufactured by Konica Minolta Corporation is used as the reference luminance meter (spectral luminance meter) 2. bottom.

In FIG. 3, white circles indicate the measured values of the reference luminance meter 2, and black circles indicate the measured values of the stimulation value type luminance meter 1. In FIG. 3, the measured value of the reference luminance meter 2 changes with time. Normally, the measuring instrument is managed with this minute change as "uncertainty". Further, the measured value of the reference luminance meter 2 is used as a reference value, and the difference from the measured value of the stimulation value type luminance meter 1 is treated as an error.

In the actual production process, as described above, the display 3 is adjusted based on the measurement result of the stimulation value type luminance meter 1, the measured value is measured again by the stimulation value type luminance meter 1, and some of the displays 3 are further measured. Will be measured by the reference luminance meter 2.

FIG. 4 shows a change in the Y value when the display 3 is measured by the stimulus value type luminance meter 1 and the reference luminance meter 2. In FIG. 4, white circles indicate the measured values of the reference luminance meter 2, and black circles indicate the measured values of the stimulation value type luminance meter 1. Further, the measured values arranged in the vertical direction are the measured values for the same display (denoted as Display panel in FIG. 4) 3, and the measured values of the different displays 3 in the horizontal direction are shown.

In FIG. 4, the value measured by the reference luminance meter 2 is treated as the true value (reference value) in the field. This value is not affected by changes in the characteristics of the display 3. The measurement error with the stimulus value type luminance meter 1 appears as a variation.

Since the light emitting state of the display 3 has already been adjusted, the variation in the measured values by the stimulation value type luminance meter 1 seems to be small. In addition to the time course of the luminance meter, the characteristics of the display 3 (spectral emission spectrum, etc.) affect the values measured by the stimulation value type luminance meter 1.

In this embodiment, as described above, the variation in the measured value difference (measurement error) between the measured value by the reference luminance meter 2 and the measured value of the stimulation value type luminance meter 1 is measured by each of the plurality of stimulation value type luminance meters 1. Calculate about.

In FIG. 5, the difference between the measured values of the Y values (Y (Y (Y)) when a plurality of displays 3 are measured by one stimulus value type luminance meter 1 (CA-410) and one reference luminance meter 2 (CS-2000). CA-410) -Y (CS-2000)) is shown. The difference in measured values varies, but when the difference in measured values becomes large, it is necessary to determine whether it is a problem with the output of the stimulation value type luminance meter 1 or a problem with changes in the characteristics of the display 3 in order to identify the cause. ..

FIG. 6A shows the difference in the measured value of the Y value when a plurality of displays 3 are measured by three stimulation value type luminance meters 1 (CA-410) and one reference luminance meter 2 (CS-2000). It is a graph which shows (Y (CA-410) -Y (CS-2000)), and the figure (B) is the figure which showed the frequency of the measured value difference by a histogram. The three stimulation value type brightness meters 1 are indicated by ID = 001, ID = 002, and ID = 003, respectively.

In both the stimulation value type luminance meter 1 of ID001 and ID002, the measured value difference may exceed a preset error limit value. However, in the stimulation value type luminance meter 1 of ID001, the luminance meter itself or the display 3 is unstable and the measurement reproducibility is low. Therefore, measures such as repairing the stimulation value type luminance meter 1 and reviewing the driving conditions of the display 3 are taken. It was necessary. The stimulation value type luminance meter 1 of ID002 has high measurement reproducibility, but a correction matrix suitable for the display 3 has not been selected, and it can be solved by performing numerical correction on the output value. There was no problem with the stimulation value type luminance meter 1 of ID003.

Therefore, in order to distinguish between the stimulation value type luminance meter 1 of ID001 and the stimulation value type luminance meter 1 of ID002, the following method is adopted in this embodiment.

That is, the variation in the error of each luminance meter is represented by the standard deviation. Let the standard deviation of each stimulus value type brightness meter 1 of ID = 001, ID = 002, and ID = 003 be σ001, σ002, and σ003, respectively. Then, it is determined that the stimulation value type luminance meter 1 whose standard deviation exceeds the permissible value σTH cannot be solved by the numerical correction and needs to be adjusted. In the above example, the standard deviation σ001 of the stimulation value type luminance meter 1 with ID = 001 exceeds the permissible value σTH, and repair or review the measurement conditions.

Further, even if there is a measured value difference exceeding the error limit value, if the standard deviation does not exceed the permissible value σTH, it is determined that the problem can be solved by numerical correction of the output of the stimulation value type luminance meter 1. .. In the above example, the stimulus value type brightness meter 1 with ID = 002 is applicable. In this case, the measured value of the stimulation value type luminance meter 1 is corrected by rewriting with an appropriate correction matrix. This point will be described later.

Next, a method for determining the allowable value σTH will be described.

As the first determination method, a value larger than the variation in the measured value of the display 3 by the reference luminance meter 2 is set. If the stimulation value type luminance meter 1 is not calibrated on the appropriate reference display 3, the appropriate correction matrix cannot be generated. When determining whether or not to change the correction matrix, assuming that an error has occurred due to fluctuations in the display 3 while there is no problem with the stimulus value type luminance meter 1 itself (no change over time). As shown in FIG. 7A, the variation in the measured value of the display 3 is obtained from the measurement results of the spectral spectra of the plurality of displays 3 by the reference luminance meter 2. Then, as shown by arrows, the error of the stimulation value type luminance meter 1 is estimated and a margin is added to the X, Y, and Z values in FIG. 7B to determine the permissible value σTH. In FIG. 7B, the vertical axis is the margin of error. That is, when there is a measured value exceeding a predetermined error limit value, the stimulus value type brightness meter 1 that causes a variation exceeding the measurement variation of the display 3 determines that it cannot be solved by numerical correction, and exceeds the measurement variation of the display 3. It is judged that the stimulus value type brightness meter 1 that causes no variation can be solved by numerical correction.

As a second method for determining the permissible value σTH, there is a method of determining the uncertainty by obtaining the uncertainty by a statistical method from the difference between the measured values of each stimulus value type luminance meter 1 and the reference luminance meter 2. That is, as shown in FIG. 8, the permissible value σTH is determined by specifying the range (uncertainty) of the permissible error by a statistical method based on the difference in the measured values of each stimulus value type luminance meter 1.

Next, although there is a measured value difference that exceeds the error limit value, the standard deviation of the measured value difference does not exceed the permissible value σTH. Will be described.

As is well known, the stimulation value type luminance meter 1 causes a measurement error due to the spectral characteristics of the optical filter and the sensor, and in order to eliminate this error, the measured value can be corrected by using a correction matrix. It has been. For the stimulation value type brightness meter 1 with ID = 002, by changing this correction matrix to an appropriate correction matrix, it is possible to calculate an appropriate measured value.

The new correction matrix is generated from the measurement results of the stimulus value type brightness meter 1 and the reference brightness meter 2 with ID = 002 for the plurality of displays 3. There are the following methods as the generation method.

First, as shown in FIG. 9, a selection close to the median value or the average value (shown by a broken line in FIG. 9) of the measured values is selected from a plurality of correction matrices based on the actual measurement results of the plurality of displays 3. Then, a new correction matrix is used.

As another method, the actual measurement results for the plurality of displays 3, for example, a plurality of correction matrices based on the measurement results from the time of the previous generation of the new correction matrix to the immediately preceding are used, and the average value or the interpolation approximation thereof is used. A new correction matrix may be generated.

Using the new correction matrix generated in this way, the output value of the stimulation value type luminance meter 1 with ID = 002 is corrected.

FIG. 10 is a flowchart showing a process of determining a state change of the stimulus value type luminance meter 1 executed by the state determination device 4. This process is executed by the CPU 41 of the luminance meter state determination device 4 of FIG. 2 operating according to the operation program stored in the storage unit 43 or the like.

In step S01, the measurement data is acquired from each stimulus value type luminance meter 1 and the reference luminance meter 2, and then the acquired measurement data is stored in the storage unit 43 or the like in step S02.

In step S03, the measured values stored in the storage unit 43 or the like are read out, in step S04, the difference between the measured values measured by each of the read stimulus value type luminance meters 1 and the reference luminance meter 2 is calculated, and in step S05, each stimulus value is calculated. The variation (standard deviation) is calculated for each type luminance meter 1.

In step S06, the calculated variation is compared with the permissible value, and in step S07, it is determined whether or not there is a problem for each stimulus value type luminance meter 1. If the variation does not exceed the permissible value and each measured value does not exceed the error limit value, it is determined that there is no problem (YES in step S07), and the process proceeds to step S10. In step S10, the output value of the stimulus value type luminance meter 1 determined to have no problem is corrected by the conventional correction matrix and used as the corrected measured value.

In step S07, the stimulation value type luminance meter 1 in which the variation exceeds the permissible value or the measured value exceeds the error limit value even if the permissible value is not exceeded is determined to have a problem (NO in step S07). In step S08, it is determined whether or not the numerical correction can be applied. Since the stimulation value type luminance meter 1 whose variation exceeds the permissible value cannot be dealt with by the numerical correction, it is determined as NO in step S08, and the process proceeds to step S11, and it is determined that adjustment is necessary.

On the other hand, even if there is a measured value difference exceeding the error limit value, the variation does not exceed the permissible value and the stimulation value type luminance meter 1 can be dealt with by numerical correction (YES in step S08), so step S09. Proceed to to generate a new correction matrix. Then, in step S10, the output value is corrected by the generated new correction matrix.

As described above, in this embodiment, the measurement result of the display 3 by the plurality of stimulation value type luminance meters 1 and the display 3 selected from the displays 3 whose measured values are measured by the stimulation value type luminance meter 1 The measurement result by the reference luminance meter 2 is compared, and as a result of the comparison, it is determined whether or not the stimulation value type luminance meter 1 needs to be adjusted. Specifically, based on the comparison result between the measurement result of the display 3 by the plurality of stimulation value type luminance meters 1 and the measurement result by the reference luminance meter 2, the reference luminance is used for each of the plurality of stimulation value type luminance meters 1. The variation in the measured value difference from the total 2 is calculated, and it is determined that adjustment is necessary for the luminance meter whose variation in the measured value difference exceeds the permissible value. Therefore, a plurality of displays 3 are measured on the production line or the like. However, it is possible to determine whether or not the stimulation value type luminance meter 1 needs to be adjusted. Therefore, the production process or the like is stopped for the measurement of the standard sample, as in the case of periodically monitoring and correcting the deviation of the measurement data between the stimulation value type luminance meter 1 and the standard luminance meter 2 using the standard sample. Since it is not necessary, the decrease in efficiency can be suppressed.

Although one embodiment of the present invention has been described above, the present invention is not limited to the above embodiment. For example, although the number of the reference luminance meter 2 is one, a plurality of reference luminance meters 2 may be used. In this case, it is desirable that the reference luminance meters 2 use a reference light source to grasp the difference between the measured values.

1 Luminance meter (stimulation value type luminance meter)
2 Reference luminance meter 3 Display (measurement object)
4 Status judgment device (computer)
41 CPU
42 RAM
43 Storage unit 44 Input unit (acquisition unit)
45 Variation calculation unit 46 Comparison unit 47 Judgment unit 48 Correction matrix generation unit 49 Correction unit

Claims (21)

With multiple luminance meters
With a reference luminance meter
Comparison between the measurement result of the measurement object by the plurality of luminance meters and the measurement result by the reference luminance meter of the measurement object selected from the measurement objects whose measured values were measured by the luminance meter. Means and
As a result of comparison by the comparison means, a determination means for determining the necessity of adjustment of the luminance meter, and
A luminance meter state determination system characterized by being equipped with. A calculation means for calculating the variation in the measured value difference from the reference luminance meter is provided for each of the plurality of luminance meters based on the comparison result by the comparison means.
The luminance meter state determination system according to claim 1, wherein the determination means determines that adjustment is necessary for a luminance meter in which the variation of the measured value difference calculated by the arithmetic means exceeds an allowable value. The luminance meter state determination system according to claim 2, wherein the allowable value is set to a value larger than a variation in the measured values of the object to be measured by the reference luminance meter. The luminance meter state determination system according to claim 2, wherein the allowable value is set by obtaining uncertainty from the measured value difference by a statistical method. When it is determined by the determination means that the adjustment of the luminance meter is unnecessary and it is necessary to change the correction matrix, the measurement result by the luminance meter and the measurement result by the reference luminance meter for a plurality of measurement objects are used. A generation means to generate a new correction matrix,
A correction means that corrects the output value using the correction matrix generated by the generation means, and a correction means.
The luminance meter state determination system according to any one of claims 1 to 4, further comprising. The luminance meter state determination system according to claim 5, wherein the generation means generates a new correction matrix by selecting from a plurality of correction matrices based on measurement results for a plurality of measurement objects. The luminance meter state determination system according to claim 5, wherein the generation means generates a new correction matrix by averaging or interpolation approximation from a plurality of correction matrices based on measurement results for a plurality of measurement objects. Acquire the measurement result of the measurement object by a plurality of luminance meters, and acquire the measurement result by the reference luminance meter of the measurement object selected from the measurement objects whose measured values are measured by the luminance meter. Means and
A comparison means for comparing the measurement result by the luminance meter acquired by the acquisition means and the measurement result by the reference luminance meter, and
As a result of comparison by the comparison means, a determination means for determining the necessity of adjustment of the luminance meter, and
A luminance meter state determination device characterized by being equipped with. A calculation means for calculating the variation in the measured value difference from the reference luminance meter is provided for each of the plurality of luminance meters based on the comparison result by the comparison means.
The luminance meter state determining apparatus according to claim 8, wherein the determining means determines that adjustment is necessary for a luminance meter in which the variation of the measured value difference calculated by the arithmetic means exceeds the permissible value. The luminance meter state determination device according to claim 9, wherein the allowable value is set to a value larger than a variation in the measured values of the object to be measured by the reference luminance meter. The luminance meter state determination device according to claim 9, wherein the allowable value is set by obtaining uncertainty from the measured value difference by a statistical method. When it is determined by the determination means that the adjustment of the luminance meter is unnecessary and it is necessary to change the correction matrix, the measurement result by the luminance meter and the measurement result by the reference luminance meter for a plurality of measurement objects are used. A generation means to generate a new correction matrix,
A correction means that corrects the output value using the correction matrix generated by the generation means, and a correction means.
The luminance meter state determination apparatus according to any one of claims 8 to 11. The luminance meter state determination device according to claim 12, wherein the generation means generates a new correction matrix by selecting from a plurality of correction matrices based on measurement results for a plurality of measurement objects. The luminance meter state determination device according to claim 12, wherein the generation means generates a new correction matrix by averaging or interpolation approximation from a plurality of correction matrices based on measurement results for a plurality of measurement objects. Acquire the measurement result of the measurement object by a plurality of luminance meters, and acquire the measurement result by the reference luminance meter of the measurement object selected from the measurement objects whose measured values are measured by the luminance meter. Steps and
A comparison step for comparing the measurement result by the luminance meter acquired by the acquisition step with the measurement result by the reference luminance meter, and
As a result of the comparison by the comparison step, the determination step of determining the necessity of adjusting the luminance meter and the determination step
A program that lets your computer run. Based on the comparison result by the comparison step, the computer is further made to perform a calculation step for calculating the variation in the measured value difference from the reference luminance meter for each of the plurality of luminance meters.
The program according to claim 15, wherein in the determination step, it is determined that adjustment is necessary for the luminance meter in which the variation in the measured value difference calculated in the calculation step exceeds the permissible value. The program according to claim 16, wherein the permissible value is set to a value larger than a variation in the measured values of the object to be measured by the reference luminance meter. The program according to claim 16, wherein the allowable value is set by obtaining uncertainty from the measured value difference by a statistical method. When it is determined by the determination step that the adjustment of the luminance meter is unnecessary and it is determined that the correction matrix needs to be changed, the measurement result by the luminance meter and the measurement result by the reference luminance meter for a plurality of measurement objects are used. A generation step to generate a new correction matrix,
A correction step that corrects the output value using the correction matrix generated in the generation step, and a correction step.
The program according to any one of claims 15 to 18, further causing the computer to execute the program. The program according to claim 19, wherein in the generation step, a new correction matrix is generated by selecting from a plurality of correction matrices based on measurement results for a plurality of measurement objects. The program according to claim 19, wherein in the generation step, a new correction matrix is generated by averaging or interpolation approximation from a plurality of correction matrices based on measurement results for a plurality of measurement objects.

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