JPWO2018110333A1 - Color measuring system - Google Patents

Abstract

The time required for calibration in a plurality of color measuring instruments performed to eliminate the influence of fluctuations in internal temperature is shortened. In the color measurement system, first to Nth color measurement devices are connected to the control device. The first to Nth color measuring devices include first to Nth temperature sensors, respectively. The first to Nth temperature sensors detect the first to Nth internal temperatures, respectively. The first to Nth temperature fluctuation amounts are acquired from the first to Nth internal temperatures, respectively. The control device performs the calibration from the first to the Nth in such a manner that all of the first to Nth color measuring devices are simultaneously calibrated when a part of the first to Nth temperature fluctuation amounts exceeds the allowable value. Control color measuring equipment up to.

Description

  The present invention relates to a color measurement system.

  The light source color measuring device is a device that measures the luminance and color of the light source.

  There is known a light source color measurement system in which a plurality of light source color measurement devices are connected to a control device and controlled by the control device. The colorimeter described in Patent Document 1 is an example. In the colorimeter described in Patent Document 1, a plurality of probe units that are examples of a plurality of light source color measuring devices are connected to a main body unit that is an example of a control device, and the plurality of probe units are controlled by the main body unit. (Summary).

  The plurality of light source color measuring instruments are calibrated as necessary. Also in the colorimeter described in Patent Document 1, a plurality of stimulus value direct-reading probe units connected to the main body are calibrated based on the measurement results of the spectroscopic probe unit connected to the main body ( wrap up).

  The characteristics of the light source color measuring instrument have temperature dependence. For this reason, when the fluctuation of the internal temperature of the light source color measurement device exceeds the allowable value, the light source color measurement device is calibrated in order to eliminate the influence of the fluctuation of the internal temperature.

  On the other hand, the internal temperatures of a plurality of light source color measuring devices are often different from each other.

  Therefore, when calibration is performed in each light source color measuring device in synchronization with the fluctuation of the internal temperature of each light source color measuring device exceeding the allowable value, each of the plurality of light source color measuring devices. Calibration is performed at different timings in the measuring device.

International Publication No. 2010/021258

  When calibration is performed at different timings in a plurality of light source color measuring devices, the time required for calibration in the plurality of light source color measuring devices becomes longer, and the light source color measurement performed by the plurality of light source color measuring devices is interrupted. The time will be longer.

  This problem is particularly noticeable when a plurality of light source color measuring devices simultaneously perform light source color measurement and continuously perform light source color measurement.

  This problem also occurs when color measurement other than light source color measurement is performed.

  The invention described in the detailed description of the invention aims to solve this problem. The problem to be solved by the invention described in the detailed description of the invention is to shorten the time required for calibration in a plurality of color measuring instruments performed to eliminate the influence of fluctuations in internal temperature.

  In the invention described in the detailed description of the invention, the color measurement system includes first to Nth color measurement devices and a control device. N is an integer of 2 or more.

  The first to Nth color measuring devices include first to Nth temperature sensors, respectively. The first to Nth temperature sensors detect the first to Nth internal temperatures, respectively.

  The first to Nth temperature fluctuation amounts are acquired from the first to Nth internal temperatures, respectively.

  First to Nth color measuring devices are connected to the control device. The control device performs the calibration from the first to the Nth in such a manner that all of the first to Nth color measuring devices are simultaneously calibrated when even a part of the first to Nth temperature fluctuation amount exceeds the allowable value. Control color measuring equipment up to.

  According to the invention described in the detailed description of the invention, the timing at which calibration is performed in a plurality of color measuring devices performed to eliminate the influence of fluctuations in internal temperature is not dispersed in time, and is required for the calibration. Time is shortened.

  The objects, features, aspects and advantages of the present invention will become more apparent from the following detailed description and the accompanying drawings.

1 is a block diagram illustrating a light source color measurement system according to a first embodiment. It is a schematic diagram which illustrates the example of a measurement by the light source color measurement system of 1st Embodiment. It is a figure which shows the structure of the light source color measuring apparatus with which the light source color measuring system of 1st Embodiment is equipped. It is a block diagram illustrating the flow of electric power and information in the light source color measurement system of the first embodiment. It is a timing chart which illustrates the time change of the amount of temperature fluctuations in the 1st example of the light source color measurement system of a 1st embodiment. It is a timing chart which illustrates the timing which the calibration in the 1st Example of the light source color measurement system of a 1st embodiment is performed. It is a timing chart which illustrates time change of the amount of temperature fluctuation in the 1st comparative example. It is a timing chart which illustrates the timing at which calibration in the 1st comparative example is performed. It is a timing chart which illustrates the time change of the amount of temperature fluctuations in the 2nd example of the light source color measurement system of a 1st embodiment. It is a timing chart which illustrates the timing at which calibration in the 2nd example of the light source color measurement system of a 1st embodiment is performed. It is a timing chart which illustrates the time change of the amount of temperature fluctuation in the 2nd comparative example. It is a timing chart which illustrates the timing at which calibration in the 2nd comparative example is performed. It is a timing chart which illustrates the timing when various operations in the light source color measurement system of a 1st embodiment are performed. It is a timing chart which illustrates the timing when various operations in the light source color measurement system of a 1st embodiment are performed. It is a timing chart which illustrates the timing when various operations in the light source color measurement system of a 1st embodiment are performed. It is a timing chart which illustrates the timing when various operations in the light source color measurement system of a 1st embodiment are performed. It is a timing chart which illustrates time change of power supply current in the light source color measurement system of a 1st embodiment.

1 First Embodiment 1.1 Introduction A first embodiment relates to a light source color measurement system.

1.2 Light Source Color Measurement System FIG. 1 is a block diagram illustrating a light source color measurement system according to the first embodiment.

A light source color measurement system 1000 illustrated in FIG. 1 includes N light source color measurement devices P ₁ , P ₂ , P ₃ ,..., P _N and a control device 1020. N is an integer of 2 or more. The light source color measurement system 1000 may include components other than these components.

Light source color measuring device _{P 1, P 2, P 3} , ···, the _{P N} each is a receiving probe or the like, to measure the light source color receives light from the light source. The measurement of the light source color is to acquire information on the intensity and color of light from the light source and specify the luminance and color of the light source. The light source color measurement devices P ₁ , P ₂ , P ₃ ,..., P _N are replaced with N object color measurement devices, and the light source color measurement system 1000 is replaced with an object color measurement system. Each of the N object color measuring devices receives light from a reflector that reflects light from the light source or a transmissive body that transmits light from the light source, and measures the object color.

Light source color measurement devices P ₁ , P ₂ , P ₃ ,..., _PN are electrically connected to the control device 1020. Controller 1020, light source color measuring instrument _{P 1, P 2, P 3} , ···, supplies power to _{P N,} light source color measuring instrument _{P 1, P 2, P 3} , ···, the _{P N} Control and collect measured values of the light source color from the light source color measuring devices P ₁ , P ₂ , P ₃ ,..., P _N.

The control device 1020 transmits commands, data, and signals to each of the light source color measuring devices P ₁ , P ₂ , P ₃ ,..., _PN , and the light source color measuring devices P ₁ , P ₂ , P ₃ ,. Each of _PN receives the transmitted command, data and signal from the controller 1020. Light source color measuring device _{P 1, P 2, P 3} , ···, each _{P N} is the command, and transmits the data and signals to the controller 1020, the controller 1020, the transmitted command, the data and signals light source color measuring device _{P 1, P 2, P 3} , ···, received from each of the _{P N.} Commands and data may take the form of signals.

1.3 Measurement Example FIG. 2 is a schematic diagram illustrating a measurement example by the light source color measurement system of the first embodiment.

  The measurement example shown in FIG. 2 is for N = 4.

In the measurement example illustrated in FIG. 2, four light source colors on the display surface of the display 1030 are produced by four light source color measuring devices P ₁ , P ₂ , P _3, and P ₄ during the production of the display 1030. Measured. The four points are measured because the display surface is large. Three or less points or five or more points may be measured. Measurements by the light source color measuring devices P ₁ , P ₂ , P ₃ and P ₄ are performed simultaneously. The measurement is performed at the same time because the signal for driving the display 1030 has periodicity. The measurement value obtained by the measurement is used for inspecting the uniformity and temporal change of luminance and chromaticity on the display surface of the display 1030.

When four-point simultaneous measurement is performed in this way, for example, when it is necessary to perform calibration in _one light source color measurement device P ₁ , the remaining three light source color measurement devices P ₂ , P ₃ and P ₄ , the light source color measurement is interrupted in all of the _four light source color measurement devices P ₁ , P ₂ , P ₃ and P ₄ , so that the one light source color measurement device P _{In 1} the calibration must be performed. Therefore, when the calibrations in the light source color measurement devices P ₁ , P ₂ , P ₃ and P ₄ are performed at different timings, the continuous measurement is interrupted each time each calibration is performed, and the productivity of the display 1030 decreases. .

Therefore, in the light source color measurement system 1000, the calibration in one when the need to perform calibration occurs in the light source color measuring instrument P ₁ has three light source color of the remaining measuring instrument P _2, P ₃ and P ₄ Even if it is not necessary to perform the calibration, calibration is performed in all of the _four light source color measuring instruments P ₁ , P ₂ , P ₃ and P ₄ . As a result, the frequency at which continuous measurement, which is a concern due to the temporal dispersion of the timing at which calibration is performed in the light source color measurement devices P ₁ , P ₂ , P ₃ and P _4, is suppressed.

1.4 Light Source Color Measuring Device FIG. 3 is a diagram illustrating a configuration of a light source color measuring device provided in the light source color measuring system of the first embodiment.

The light source color measuring device P shown in FIG. 3 is each of the light source color measuring devices P ₁ , P ₂ , P ₃ ,..., P _N and includes a shutter 1040, a motor 1041, an optical sensor 1042, and a temperature sensor 1043. , An acquisition unit 1044 and a storage element 1045 are provided.

  The operation of the light source color measuring device P varies depending on the mode of the light source color measuring device P. The mode of the light source color measuring device P includes a normal measurement mode, a calibration mode, and a temperature information output mode.

  When the mode of the light source color measurement device P is the normal measurement mode, the light source color measurement device P performs the light source color measurement of the normal measurement and transmits data indicating the light source color measurement value of the normal measurement to the control device 1020. Then, temperature measurement is performed, and data indicating the temperature fluctuation amount is transmitted to the control device 1020. In the light source color measurement of the normal measurement, the optical path 1060 of the light incident on the optical sensor 1042 used for the light source color measurement is opened by the shutter 1040, and the light to be subjected to the light source color measurement is incident on the optical sensor 1042 and incident. A signal corresponding to the intensity and color of the emitted light is output from the optical sensor 1042. In the light source color measurement of normal measurement, for example, the luminance and color of a light emitter such as a liquid crystal panel are specified. In the temperature measurement, the temperature sensor 1043 detects the temperature of the optical sensor 1042, and the acquisition unit 1044 acquires the temperature fluctuation amount from the detected temperature. The acquisition unit 1044 transmits data indicating the acquired temperature fluctuation amount to the control device 1020. The temperature fluctuation amount is a fluctuation in the temperature of the optical sensor 1042 newly detected from the temperature of the optical sensor 1042 detected in the previous calibration stored in the storage element 1045. The internal temperature of the light source color measurement device P other than the temperature of the optical sensor 1042 may be detected.

  When the mode of the light source color measurement device P is the calibration mode, the light source color measurement device P performs light source color measurement for calibration, and stores data indicating the measurement value of light source color measurement for calibration as the storage element 1045. Remember me. In the light source color measurement for calibration, the optical path 1060 is blocked by the shutter 1040 so that the light that is the target of the light source color measurement is not incident on the optical sensor 1042, and the light that is the target of the light source color measurement is the optical sensor 1042. When the light does not enter the light, a signal is output from the optical sensor 1042, and the temperature fluctuation amount is reset. Therefore, before the light source color measurement for calibration is performed, a pre-driving operation in which the motor 1041 drives the shutter 1040 so that the shutter 1040 blocks the optical path 1060 is performed. The preliminary driving operation is a driving operation for preparing light source color measurement for calibration. In addition, after the light source color measurement for calibration is executed and the data indicating the measurement value is stored, the subsequent driving operation in which the motor 1041 drives the shutter 1040 so that the shutter 1040 opens the optical path 1060 is executed. . Therefore, the pre-driving operation, the light source color measurement, and the post-driving operation are executed serially. The reason why the temperature fluctuation amount is reset at the time of calibration is that the measurement of the temperature fluctuation amount is started at the time of calibration.

  When the mode of the light source color measurement device P is the temperature information output mode, the light source color measurement device P performs temperature measurement. In the temperature measurement, the temperature sensor 1043 detects the temperature of the optical sensor 1042, and the acquisition unit 1044 acquires the temperature fluctuation amount from the detected temperature. The acquisition unit 1044 transmits data indicating the acquired temperature fluctuation amount to the control device 1020.

1.5 Significance of detecting temperature fluctuation amount The characteristic of the optical sensor 1042 has temperature dependence. For example, when the optical sensor 1042 is a silicon element, the sensitivity of the optical sensor 1042 has an extremely small temperature coefficient, but the offset voltage of the optical sensor 1042 has a slightly large temperature coefficient of about −2 mV / ° C. Further, the range of brightness of the light to be light source color measurement is generally ^{10 -3} to ¹⁰ 6 cd / ^{m 2,} the luminance of light to be the light source color measurement is the lower limit of the range ¹⁰ -3 cd In the case of / m ² , the signal level of the signal output from the optical sensor 1042 is only several mV at the time of voltage conversion. Therefore, in order to maintain sufficient measurement accuracy for weak light in an environment where the temperature changes, an offset is obtained when the obtained temperature fluctuation amount exceeds the temperature fluctuation amount that can maintain the required measurement accuracy. The component is removed by an operation based on the measured value. The means for removing the offset component includes not only calculation but also compensation by a circuit.

1.6 Control Device The control device 1020 includes a main body 1080 and a power source 1081 as shown in FIG. The main body 1080 includes an interface 1100, a control unit 1101, and a determination unit 1102.

The interface 1100, light source color measuring instrument _{P 1, P 2, P 3} , ···, P N are connected.

Controller 1101, light source color measuring instrument _{P 1, P 2, P 3} , ···, controls the _{P N.}

  The determination unit 1102 determines the number of motors 1041 that can be driven simultaneously from the ratio of the electric power required to drive one motor 1041 and the capacity of the power supply 1081. In the first embodiment, it is determined that the number of motors 1041 that can be driven simultaneously is one.

Power 1081, AC adapter, a battery or the like, and supplies to the main body 1080 to supply power, light source color via the body 1080 measuring device _{P 1, P 2, P 3} , ···, the power _{P N} . Thus, the body 1080 is driven by a power source 1081, light source color measuring instrument _{P 1, P 2, P 3} , ···, supplies power to _{P N.}

1.7 Communication Between Controller and Light Source Color Measurement Device FIG. 4 is a block diagram illustrating the flow of power and information in the light source color measurement system of the first embodiment.

  When the mode of the light source color measurement device P is the normal measurement mode, the control unit 1101 transmits a measurement command for normal measurement to the light source color measurement device P. The light source color measurement device P receives the transmitted measurement command for normal measurement from the control unit 1101, performs light source color measurement in response to receiving the measurement command for normal measurement, and measures the light source color measurement. Data indicating the value is transmitted to the control unit 1101.

  When the mode of the light source color measurement device P is the calibration mode, the control unit 1101 transmits a measurement command for calibration to the light source color measurement device P. The light source color measurement device P receives the transmitted measurement command for calibration from the control unit 1101, performs light source color measurement in response to receiving the measurement command for calibration, and indicates that the calibration is completed. A completion signal is transmitted to the control unit 1101. Data indicating the measurement value of the light source color measurement may be transmitted to the control device 1020. Further, the control unit 1101 transmits a control signal to the light source color measurement device P at a timing at which the motor 1041 drives the shutter 1040. The light source color measuring device P receives the transmitted control signal from the control unit 1101, executes a driving operation for driving the motor 1041 to drive the shutter 1040 in response to the reception of the control signal, and a completion signal when the driving operation is completed. Is transmitted to the control unit 1101. The control unit 1101 receives the transmitted completion signal from the light source color measurement device P.

  When the mode of the light source color measuring device P is the temperature information output mode, the control unit 1101 transmits a command for requesting the temperature fluctuation amount to the light source color measuring device P. The light source color measurement device P receives the transmitted command for requesting the temperature fluctuation amount from the control unit 1101, performs temperature measurement in response to receiving the command for requesting the temperature fluctuation amount, and indicates data indicating the temperature fluctuation amount. Is transmitted to the control unit 1101. The control unit 1101 receives the transmitted data indicating the amount of temperature fluctuation from the light source color measurement device P. In place of or in addition to the temperature fluctuation amount, data indicating comparison information indicating a result of comparison between the preset allowable value and the temperature fluctuation amount is transmitted in response to reception of a command requesting the comparison information. May be. Data indicating the temperature itself may be transmitted instead of the temperature fluctuation amount. In this case, the control device 1020 acquires the temperature fluctuation amount from a plurality of temperatures at a plurality of different times received from the light source color measurement device P.

  In the light source color measuring device P, the temperature of the optical sensor 1042 is continuously detected. For this reason, when the temperature fluctuation amount exceeds the allowable value, the light source color measurement device P may transmit a signal recommending calibration to the control unit 1101 at an arbitrary timing.

The control unit 1101 controls the timing of acquiring the temperature fluctuation amount so that the calibration in the light source color measurement devices P ₁ , P ₂ , P ₃ ,..., P _N is performed at a timing that does not inhibit continuous measurement. For example, if the time interval between the previous measurement and the subsequent measurement that follows the previous measurement is sufficient, the amount of temperature fluctuation is acquired before and after the previous measurement and during the waiting time of the subsequent measurement. The calibration is completed by a later measurement.

1.8 Calibration timing control controller 1101, light source color measuring instrument _{P 1,} P _2, P 3, · · ·, light source color measurement if it exceeds the allowable value even part of the temperature variation in the _{P N} instrument P _{1, P 2, P 3,} ···, light source color measured as simultaneously zero calibration in all _{P N} is made devices _{P 1, P 2, P 3} , ···, controls the _{P N.}

1.9 First Example of Calibration Timing Control FIGS. 5A and 5B are timing diagrams illustrating a first example of the time variation of the temperature variation and the timing at which calibration is executed in the light source color measurement system of the first embodiment. It is a chart.

5A and 5B, the time variation of the temperature fluctuation amount and the timing at which the calibration is performed are N = 4, and the time required for executing the previous driving operation, the light source color measurement, and the subsequent driving operation, respectively. These are about 0.25 seconds, 3 seconds, and about 0.25 seconds, and the time required for calibration is about 3.5 seconds. This time is the shortest time required for calibration, excluding transmission / reception processing. 5A and 5B is performed at the timing when the temperature variation and the calibration are executed according to the temperature of the environment in which the light source color measuring devices P ₁ , P ₂ , P ₃ and P ₄ are installed. It is a thing when it changes only in ° C.

When the light source color measurement devices P ₁ , P ₂ , P ₃ and P ₄ are used in the same temperature environment, the temperature of the optical sensor 1042 provided in the light source color measurement devices P ₁ , P ₂ , P ₃ and P ₄ Is generally time-varying. For this reason, when the light source color measurement devices P ₁ , P ₂ , P ₃ and P ₄ are used in the same temperature environment, the temperature fluctuation amount in the light source color measurement devices P ₁ , P ₂ , P ₃ and P ₄ is As shown in FIG. 5A, the time changes approximately similarly.

However, even when the light source color measuring devices P ₁ , P ₂ , P ₃ and P ₄ are used in the same temperature environment, the light source color measuring devices P ₁ , P ₂ , P ₃ and P ₄ are provided. The temporal changes in the temperature of the optical sensor 1042 are slightly different from each other. For this reason, even when the light source color measuring devices P ₁ , P ₂ , P ₃ and P ₄ are used in the same temperature environment, the temperatures of the light source color measuring devices P ₁ , P ₂ , P ₃ and P ₄ are used. As shown in FIG. 5A, the temporal changes of the fluctuation amounts are slightly different from each other.

Therefore, even if the light source color measuring devices P ₁ , P ₂ , P ₃ and P ₄ are used under the same temperature environment, as shown in FIG. 5A, the temperature fluctuations in the light source color measuring device P ₁ At timing T ₁ when the amount exceeds the allowable value of 3 ° C., it is possible that the temperature fluctuation amount in the light source color measuring devices P ₂ , P ₃ and P ₄ has not yet exceeded the allowable value of 3 ° C.

In the first embodiment, since it is assumed that the timings at which calibration is required in the light source color measuring devices P ₁ , P ₂ , P ₃ and P ₄ are close to each other, they are shown in FIGS. 5A and 5B. in so that calibration _C 1 respectively performed at the timing _T light source color measuring device _P 1 in _1, P 2, _{P 3} and _{P 4} in which the temperature variation of the light source color measuring instrument _{P 1} exceeds 3 ° C. is allowable value, C _{2, C 3} and _{C 4} are started simultaneously. For this reason, calibrations C ₁ , C ₂ , C ₃ and C ₄ are performed simultaneously. Therefore, the time required to perform calibrations C ₁ , C ₂ , C ₃ and C ₄ is about 3.5 seconds.

1.10 First Comparative Example of Calibration Timing Control FIGS. 6A and 6B are timing charts illustrating a first comparative example of the time variation of the temperature fluctuation amount and the timing at which calibration is executed.

In the first comparative example compared with the first example, as shown in FIGS. 6A and 6B, at the timing T _{1 when the} temperature fluctuation amount in the light source color measuring device P ₁ exceeds the allowable value of 3 ° C. Calibration C ₁ performed in the light source color measuring device P ₁ is started, and calibration C performed in the light source color measuring device P ₂ at a timing T ₂ when the temperature fluctuation amount in the light source color measuring device P ₂ exceeds the allowable value of 3 ° C. ₂ is started, calibration C ₃ carried out in the light source color measurement instrument P ₃ is started at the timing T ₃ to a temperature variation in the light source color measurement instrument P ₃ exceeds 3 ° C. is tolerance, light source color measurement instrument P ₄ calibration C ₄ amount temperature variation is performed in the light source color measurement instrument P ₄ at the timing T ₄ exceeding 3 ° C. are permissible value is started in. Therefore, calibration _{C 1,} C 2, _{C 3} and _{C 4} are not performed simultaneously. Thus, for example, the interval between two adjacent timings at timings T ₁ , T ₂ , T ₃ and T ₄ is 3 to 4 seconds, and calibrations C ₁ , C ₂ , C ₃ and C ₄ take little time. When executed serially, the time required to perform calibrations C ₁ , C ₂ , C ₃ and C ₄ is about 14 seconds.

1.11 Second Example of Calibration Timing Control FIGS. 7A and 7B are timing diagrams illustrating a second example of the time variation of the temperature variation and the timing at which calibration is executed in the light source color measurement system of the first embodiment. It is a chart.

7A and 7B, the timing for executing the time variation and calibration of the temperature fluctuation amount is N, and the time required for executing the prior driving operation, the light source color measurement, and the subsequent driving operation is respectively These are about 0.25 seconds, 3 seconds, and about 0.25 seconds, and the time required for calibration is about 3.5 seconds. 7A and 7B, the timing of the time variation and the calibration of the temperature variation is executed by the temperature of the environment in which the light source color measuring devices P ₁ , P ₂ , P ₃ and P ₄ are installed. It is a thing when it changes only in ° C.

When the light source color measuring devices P ₁ , P ₂ , P ₃ and P ₄ are used under the same temperature environment, the temperature fluctuation amounts in the light source color measuring devices P ₁ , P ₂ , P ₃ and P ₄ are shown in FIG. 7A. As shown in FIG. 4, the time changes in substantially the same manner. However, even if the light source color measurement devices P ₁ , P ₂ , P ₃ and P ₄ are used under the same temperature environment, the temperature fluctuations in the light source color measurement devices P ₁ , P ₂ , P ₃ and P ₄ The time variations of the quantities are slightly different from each other as illustrated in FIG. 7A.

In the second embodiment, as illustrated in FIGS. 7A and 7B, the light source color measurement instrument light source color measuring device P ₁ at the timing T ₁ the amount of temperature variation exceeds 3 ° C. is limit for P _1, P ₂ , calibrations C ₁ , C ₂ , C ₃ and C ₄ performed at ₂ , P ₃ and P ₄ respectively are started simultaneously. For this reason, calibrations C ₁ , C ₂ , C ₃ and C ₄ are performed simultaneously. The time required to perform calibrations C ₁ , C ₂ , C ₃ and C ₄ is about 3.5 seconds.

According to the second embodiment, when continuous measurement is performed in the production process, after the continuous measurement is interrupted for about 3.5 seconds for calibration C ₁ , C ₂ , C ₃ and C ₄ , the light source color Continuous measurement is continued until the temperature fluctuation amount in the measuring device P ₁ , P ₂ , P ₃ or P ₄ exceeds the allowable value. Therefore, the calibration C ₁ , C ₂ , C ₃ and C ₄ have little influence on the production process.

1.12 Second Comparative Example of Calibration Timing Control FIGS. 8A and 8B are timing charts illustrating a second comparative example of the time variation of the temperature fluctuation amount and the timing at which calibration is executed.

In the second comparative example compared with the second example, as shown in FIGS. 8A and 8B, at the timing T _{1 when the} amount of temperature fluctuation in the light source color measuring device P ₁ exceeds the allowable value of 3 ° C. Calibration C ₁ performed in the light source color measuring device P ₁ is started, and calibration C performed in the light source color measuring device P ₂ at a timing T ₂ when the temperature fluctuation amount in the light source color measuring device P ₂ exceeds the allowable value of 3 ° C. ₂ is started, calibration C ₃ carried out in the light source color measurement instrument P ₃ is started at the timing T ₃ to a temperature variation in the light source color measurement instrument P ₃ exceeds 3 ° C. is tolerance, light source color measurement instrument P ₄ calibration C ₄ amount temperature variation is performed in the light source color measurement instrument P ₄ at the timing T ₄ exceeding 3 ° C. are permissible value is started in. For this reason, the calibrations C ₁ , C ₂ , C ₃ and C ₄ are not performed simultaneously but are performed intermittently.

According to the second comparative example, when continuous measurement is performed in the production process, the continuous measurement is further performed for each of the calibrations C ₂ , C ₃ and C ₄ after the continuous measurement is interrupted for the calibration C _1. Interrupted. Therefore, the calibration C ₁ , C ₂ , C ₃ and C ₄ have a great influence on the production process. When the production process is a production process of the display 1030 or the like, interruption of continuous measurement may force reworking, and the influence of calibration C ₁ , C ₂ , C ₃ and C ₄ on the production process is even greater.

1.13 Advantages of Calibration Performed Simultaneously According to the calibration timing control of the first embodiment, the light source color measurement devices P ₁ , P ₂ , P performed to eliminate the influence of temperature fluctuations of the optical sensor 1042. _3,..., calibration in P _N are performed simultaneously, the time required for the calibration can be shortened.

Further, according to the calibration timing control of the first embodiment, the light source color measuring devices P ₁ , P ₂ , P ₃ ,..., _PN are used in the same temperature environment, and the light source color measuring devices P ₁ , P _{2 are used.} , _P 3, · · ·, if the characteristics of the _{P N} have the same temperature coefficient, light source color measuring instrument _{P 1, P 2, P 3} , ···, after the calibration is performed simultaneously in _{P N,} The time variation of the temperature fluctuation amount in the light source color measuring devices P ₁ , P ₂ , P ₃ ,..., P _N becomes almost uniform, and the light source color measuring devices P ₁ , P ₂ , P ₃ ,. _{At N} , calibration is required almost simultaneously again, and continuous measurement is unlikely to be hindered. Such a situation occurs when light source color measuring devices P ₁ , P ₂ , P ₃ ,..., P _N of the same type are used in display inspection or the like.

On the other hand, the timing at which the temperature fluctuation amount in the light source color measuring devices P ₁ , P ₂ , P ₃ ,..., P _N exceeds the allowable value is temporally dispersed and the timing at which calibration is performed is temporally dispersed. In this case, continuous measurement is likely to be hindered.

1.14 Drive / Measurement Timing Control FIGS. 9A to 9D and FIG. 10 are timing charts illustrating the timing at which various operations are performed in the light source color measurement system of the first embodiment and the time variation of the power supply current.

Time variation of the timing and the power supply current various operations is performed, illustrated in FIG 9A~-9D and 10, light source color measuring instrument _{P 1, P 2, P 3} , ···, the mode of _{P N} calibration mode a and light source color measuring instrument _{P 1, P 2, P 3} , ···, is of the case where zero calibration is performed simultaneously in _{P N.} The power supply current shown in FIG. 10 is the current supplied from the power supply 1081 to the light source color measurement devices P ₁ , P ₂ , P ₃ ,..., P _N for the previous drive operation and the subsequent drive operation. It is time change.

As illustrated in FIG 9A~-9D and 10, light source color measuring instrument _{P 1,} P _2, P 3, · · ·, if the zero calibration is performed simultaneously in _{P N,} the light source color measurement instrument P ₁ , P ₂ , P ₃ ,..., P _N respectively perform a prior drive operation B ₁ , B ₂ , B ₃ ,..., B _N, and measure the light source color M ₁ for zero calibration. _{, M 2, M 3, ···} , execute each _{M N,} executes post drive operation _{a 1, a 2, a 3} , ···, a N , respectively. Advance driving operation _{B 1, B 2, B 3} , ···, B N is the light source color measurement _{M 1, M 2, M 3} , ···, are performed respectively in front of _{M N.} Drive operation _A 1 of the _{post, A 2, A 3, ···} , A N is the light source color measurement _{M 1, M 2, M 3} , ···, are performed respectively after the _{M N.} Thus, light source color measuring instrument _{P 1, P 2, P 3} , ···, P N in advance of the driving operation _{B 1, B 2, B 3} , ···, B N, the light source color measurement _M 1, M _{2, M} 3, executes · · ·, _{M N} and post driving operation _{a 1, a 2, a 3} , ···, the _{a N} serially respectively.

The pre-driving operation B _i includes driving of the motor 1041 provided in the light source color measuring instrument P _i . Shutter 1040 provided in the light source color measurement instrument _{P i,} if the driving of the motor 1041 provided in the light source color measurement instrument _{P i} in the pre-driving operation _{B i} is performed, block the light path 1060 in the light source color measurement instrument _{P i} It is driven from a motor 1041 provided in the light source color measurement instrument P _i to. i is each of integers 1, 2, 3,..., N.

The subsequent driving operation A _i includes driving of the motor 1041 provided in the light source color measurement device P _i . Shutter provided in the light source · BR> F measuring instrument P _i 1040, when the driving of the motor 1041 provided in the light source color measurement instrument P _i in the posterior of the drive operation A _i is performed, the optical path in the light source color measurement instrument P _i 1060 is driven from the motor 1041 provided in the light source color measurement instrument _{P i} to open the. i is each of integers 1, 2, 3,..., N.

Advance driving operation _{B 1, B 2, B 3} , ···, B N are different timings _{TB 1, TB 2, TB} 3 to one another, ..., are respectively executed in TB _N. The light source color measurements M ₁ , M ₂ , M ₃ ,..., _MN are simultaneously executed at the timing TM. Post driving operation _{A 1, A 2, A 3} , ···, A N is different timings _{TA 1, TA 2, TA} 3 together, ..., are respectively executed by TA _N.

Therefore, the control unit 1101 performs zero calibration simultaneously in the light source color measurement devices P ₁ , P ₂ , P ₃ ,..., P _{N and} performs light source color measurements M ₁ , M ₂ , M ₃ ,. when _{the N} is performed simultaneously, the timing TB _i for pre-driving operation _{B i} is performed, in advance of the driving operation _{B 1, ···, B i-} 1, B i + 1, ···, B N is timing _TB 1 respectively _{executed, ···, TB i-1,} TB i + 1, ···, so as to be different from the TB _N, light source color measuring instrument _{P 1, P 2, P 3} , ···, P N To control. i is each of integers 1, 2, 3,..., N. The advance drive operation B _i is included in the advance drive operations B ₁ , B ₂ , B ₃ ,..., B _N. Advance driving operation _{B 1, ···, B i-} 1, B i + 1, ···, B N in advance of the driving operation _{B 1, B 2, B 3} , ···, are included in the _{B N} , Different from the previous driving operation B _i . As a result, the control unit 1101 allows the light source color measuring devices P ₁ , P ₂ , P ₃ , and the like so that the power supplied from the power source 1081 does not exceed the capacity of the power source 1081 when the prior driving operation B _i is executed. ..., _PN is controlled.

Control unit 1101 in advance of the driving operation _{B 1, B 2, B 3} , ···, B N, and post driving operation _{A 1, A 2, A 3} , ···, is performed simultaneously in _{A N} The number of drive operations is made to coincide with the number of motors 1041 that can be driven at the same time determined by the determination unit 1102. Therefore, the number of drive operations executed simultaneously is changed so that the power supplied from the power supply 1081 does not exceed the capacity of the power supply 1081. In the first embodiment, the number of drive operations executed simultaneously is one. However, the number of drive operations executed simultaneously may be two or more.

According to the drive / measurement timing control of the first embodiment, prior drive operations B ₁ , B ₂ , B ₃ ,..., B _N and subsequent drive operations A ₁ , A ₂ , A ₃ ,. .. When _AN is executed, the maximum value of the power supply current is limited to the power supply current required to drive one motor 1041, the power supply current is made uniform over time, and the power supply current has a large peak Does not occur. This light source color measuring instrument _{P 1, P 2, P 3} , ···, when the zero calibration is performed simultaneously in _{P N,} in advance of the driving operation _{B 1, B 2, B 3} , ···, B _N, and post driving operation _{a 1, a 2, a 3} , ···, a light source color measuring instrument _P 1 _{when N} is _executed, P _2, P 3 fed, ..., and _{P N} This contributes to preventing the power supplied from the power source 1081 from exceeding the capacity of the power source 1081. This advantage is particularly noticeable when the power source 1081 is an AC adapter, a battery, etc., and the capacity of the power source 1081 is limited. In such a case, the circuit can be stably operated by suppressing a decrease in the power source voltage. Contribute to.

  Although the present invention has been described in detail, the above description is illustrative in all aspects, and the present invention is not limited thereto. It is understood that countless variations that are not illustrated can be envisaged without departing from the scope of the present invention.

  The color measurement system according to the present invention can be used in the color measurement field in which color measurement is performed by a plurality of color measurement devices.

1000 light source color measurement system 1020 controller 1040 shutter 1041 motor 1081 power supply P ₁ , P ₂ , P ₃ , P ₄ ,..., _PN light source color measurement device P light source color measurement device C ₁ , C ₂ , C ₃ , C ₄ calibration B ₁ , B ₂ , B ₃ ,..., B _N advance driving operation M ₁ , M ₂ , M ₃ ,..., _MN light source color measurement A ₁ , A ₂ , A ₃ ,. ··, _{a N} post of driving operation

Claims (3)

N is an integer of 2 or more, and each of the first to Nth temperature sensors is provided, and the first to Nth temperature sensors detect the first to Nth internal temperatures, respectively. Up to N color measuring instruments,
When the first to Nth color measuring devices are connected and even a part of the first to Nth temperature fluctuations obtained from the first to Nth internal temperatures exceeds the allowable value A control device for controlling the first to Nth color measuring devices so that calibration is simultaneously performed in all of the first to Nth color measuring devices;
A color measurement system comprising. The first to Nth color measurement devices each include first to Nth acquisition units,
The first to Nth acquisition units respectively acquire the first to Nth temperature variation amounts from the first to Nth internal temperatures, and the first to Nth temperature variations. The color measurement system according to claim 1, wherein each quantity is transmitted to the control device. The first to Nth color measuring devices respectively perform first to Nth driving operations, and perform first to Nth color measurements, respectively.
The first to Nth driving operations are driving operations for preparing the first to Nth color measurements, respectively.
The first to Nth color measurements are for calibration in the first to Nth color measuring devices, respectively.
When the calibration is performed simultaneously on all of the first to Nth color measuring devices, the control device performs the first to Nth color measurements at the same time, and performs the first to Nth color measurement. A timing at which the first at least one driving operation included in the driving operation is executed is included in the first to Nth driving operations and is different from the first at least one driving operation. The color measurement system according to claim 1, wherein the first to Nth color measurement devices are controlled differently from a timing at which a driving operation is performed.

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