JPWO2018110266A1 - Control device and color measurement system - Google Patents

Abstract

When color measurement is simultaneously performed in a plurality of color measurement devices, the power supplied from the power source when the driving operation is performed in the plurality of color measurement devices is prevented from exceeding the capacity of the power source. The first to Nth color measuring devices respectively execute the first to Nth driving operations and perform the first to Nth color measurements, respectively. The first to Nth driving operations are driving operations for preparing for the first to Nth color measurements, respectively. When the first to Nth color measurements are performed simultaneously, the timing at which the first at least one drive operation included in the first to Nth drive operations is performed is from the first to the Nth. The first to Nth color measurement devices are controlled so as to be different from the timing at which the second at least one driving operation different from the first at least one driving operation is included.

Description

  The present invention relates to a control device and 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).

  In order to calibrate a plurality of light source color measuring devices with high accuracy, zero calibration needs to be performed in the plurality of light source color measuring devices. For this reason, each of the plurality of light source color measuring devices is provided with a shutter. Further, when zero calibration is performed in each of the plurality of light source color measurement devices, a driving operation for driving the shutter is performed before the light source color measurement for zero calibration is performed. The zero level calibrated by zero calibration is affected by temperature fluctuations. Therefore, when zero calibration is performed in a plurality of light source color measuring devices, preferably, zero calibration is simultaneously performed in a plurality of light source color measuring devices.

International Publication No. 2010/021258

  When a plurality of shutters provided in each of the plurality of light source color measuring devices are manually driven, the power supplied from the control device to the plurality of light source color measuring devices and the capacity of the power source when the plurality of shutters are driven. There is no need to consider this relationship.

  However, when the shutter is an electric shutter, when zero calibration is simultaneously performed in a plurality of light source color measurement devices and the plurality of shutters are simultaneously driven, currents simultaneously flow through a plurality of motors that respectively drive the plurality of shutters. Therefore, there is a possibility that the capacity of the power supply will be exceeded if there is not enough power supplied from the power supply.

  This problem is that when a color measurement other than the light source color measurement is performed, when a light source color measurement other than the light source color measurement for zero calibration is performed, a drive operation other than the drive operation for driving the shutter is performed. It also occurs in some cases.

  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 that, when color measurement is simultaneously performed in a plurality of color measurement devices, the power source is used when the drive operation is performed in the plurality of color measurement devices. This is to suppress the power supplied from exceeding the capacity of the power source.

  In the invention described in the detailed description of the invention, the control device includes an interface, a control unit, and a power source.

  First to Nth color measuring devices are connected to the interface. N is an integer of 2 or more.

  The first to Nth color measuring devices respectively execute the first to Nth driving operations and perform the first to Nth color measurements, respectively. The first to Nth driving operations are driving operations for preparing for the first to Nth color measurements, respectively.

  When the first to Nth color measurements are performed simultaneously, the control unit determines that the timing at which the first at least one driving operation included in the first to Nth driving operations is performed is the first. The first to Nth color measurement devices are controlled so as to be different from the timing at which the second at least one driving operation included in the first to Nth driving operations is different from the first at least one driving operation. To do.

  The power supply supplies power to the first to Nth color measuring devices.

  According to the invention described in the detailed description of the invention, when color measurement is simultaneously performed in a plurality of color measurement devices, the power supplied from the power source when the driving operation is performed in the plurality of color measurement devices. Exceeds the capacity of the power supply.

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

It is a block diagram which illustrates the light source color measurement system of 1st Embodiment, 2nd Embodiment, 3rd Embodiment, and a comparative example. It is a figure which shows the structure of the light source color measurement apparatus with which the light source color measurement system of 1st Embodiment, 2nd Embodiment, 3rd Embodiment, and a comparative example is equipped. 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. It is a timing chart which illustrates the timing when various operations of the 1st comparative example are performed. It is a timing chart which illustrates the timing when various operations of the 1st comparative example are performed. It is a timing chart which illustrates the timing when various operations of the 1st comparative example are performed. It is a timing chart which illustrates the timing when various operations of the 1st comparative example are performed. It is a timing chart which illustrates the time change of the power supply current of the 1st comparative example. It is a timing chart which illustrates the timing when various operations of the 2nd comparative example are performed. It is a timing chart which illustrates the timing when various operations of the 2nd comparative example are performed. It is a timing chart which illustrates the timing when various operations of the 2nd comparative example are performed. It is a timing chart which illustrates the timing when various operations of the 2nd comparative example are performed. It is a timing chart which illustrates the time change of the power supply current of the 2nd comparative example. It is a timing chart which illustrates the timing when various operations of a 2nd embodiment are performed. It is a timing chart which illustrates the timing when various operations of a 2nd embodiment are performed. It is a timing chart which illustrates the timing when various operations of a 2nd embodiment are performed. It is a timing chart which illustrates the timing when various operations of a 2nd embodiment are performed. It is a timing chart which illustrates the timing when various operations of a 2nd embodiment are performed. It is a timing chart which illustrates the timing when various operations of a 2nd embodiment are performed. It is a timing chart which illustrates time change of power supply current of a 2nd embodiment. It is a timing chart which illustrates the timing when various operations of the 3rd comparative example are performed. It is a timing chart which illustrates the timing when various operations of the 3rd comparative example are performed. It is a timing chart which illustrates the timing when various operations of the 3rd comparative example are performed. It is a timing chart which illustrates the timing when various operations of the 3rd comparative example are performed. It is a timing chart which illustrates the time change of the power supply current of the 3rd comparative example.

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.

Each of the light source color measuring devices P ₁ , P ₂ , P ₃ ,..., P _N is a light receiving probe or the like, and receives light from the light source and measures the light source color. 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 can be replaced with N object color measurement devices, and the light source color measurement system 1000 can be 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 measuring devices P ₁ , P ₂ , P ₃ ,..., P _N 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 measurement devices P ₁ , P ₂ , P ₃ ,..., P _N , and the light source color measurement devices P ₁ , P ₂ , P ₃ ,. Each of _PN receives the transmitted command, data and signal from the control device 1020. Each of the light source color measuring devices P ₁ , P ₂ , P ₃ ,..., P _N transmits commands, data, and signals to the control device 1020, and the control device 1020 transmits the transmitted commands, data, and signals. Received from each of the light source color measuring devices P ₁ , P ₂ , P ₃ ,..., P _N. Commands and data may take the form of signals.

1.3 Light Source Color Measurement Device FIG. 2 is a diagram illustrating a configuration of a light source color measurement device provided in the light source color measurement system of the first embodiment.

The light source color measuring device P shown in FIG. 2 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, a light sensor 1042, and a temperature sensor 1043. And a memory element 1044.

  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 for the normal measurement, and sends data indicating the light source color measurement value of the normal measurement to the control device 1020. Send. 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 received 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.

  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 1044. 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. A signal when not incident on the light sensor 1042 is output. 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. .

  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. As a result, a temperature variation amount that is a variation in the temperature of the optical sensor 1042 newly detected from the temperature of the optical sensor 1042 detected at the previous calibration is acquired. The internal temperature of the light source color measurement device P other than the temperature of the optical sensor 1042 may be detected.

1.4 Significance of detecting temperature fluctuation amount The characteristics of the optical sensor 1042 are temperature-dependent. 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. 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.

1.5 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 power the 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.

1.6 Communication between the control device and the light source color measurement device 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. To do. 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 measurement device P is the temperature information output mode, the light source color measurement device P transmits data indicating the amount of temperature fluctuation 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. Instead of the temperature fluctuation amount, data indicating comparison information indicating a result of comparison between a preset allowable value and the temperature fluctuation amount may be transmitted. Instead of the temperature fluctuation amount, data indicating the temperature itself may be transmitted. 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.

1.7 Timing Control FIGS. 3A to 3D and FIG. 4 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 3A~ Figure 3D and 4, 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. 4 is the current supplied from the power supply 1081 to the light source color measuring devices P ₁ , P ₂ , P ₃ ,..., P _N for the pre-drive operation and the post-drive operation. It is time change.

As shown in FIGS. 3A to 3D and FIG. 4, the light source color measuring devices P ₁ , P ₂ , P ₃ ,..., P _N have the prior driving operations B ₁ , B ₂ , B ₃ ,. .., B _N are executed, and light source color measurements M ₁ , M ₂ , M ₃ ,..., M _N are executed for zero calibration, and the subsequent drive operations A ₁ , A ₂ , A ₃ are executed. ,..., A _N are executed. 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 Thus, the motor 1041 provided in the light source color measuring instrument P _i is driven. 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 measuring instrument P _i . Shutter 1040 provided in the light source color measurement instruments P _i, if the driving of the motor 1041 provided in the light source color measurement instruments P _i in the posterior of the drive operation A _i takes place, opens the optical path 1060 in the light source color measuring instrument P _i Thus, the motor 1041 provided in the light source color measuring instrument P _i is driven. 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 N} is executed at the same time, the timing TB _{i at} which the previous drive operation B _i is executed is the previous drive operation B ₁ ,..., B _i−1 , B _{i + 1} ,. timing TB _{1 to N} is executed, _{respectively, ···, 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} , ··・, _PN is controlled. i is each of integers 1, 2, 3,..., N. Advance driving operation B _i in advance of the driving operation _{B 1, B 2, B 3} , ···, contained in the 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} , included., The B _N However, this is different from the previous driving operation B _i . As a result, the control unit 1101 allows the light source color measurement 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 drive operation B _i is executed. ..., P _N is controlled.

Control unit 1101 in advance of the driving operation _{B 1, B 2, B 3} , ···, a number of pre-drive operations performed simultaneously in B _N, the motor 1041 can be driven at the same time determined by the determination unit 1102 Match the number. Therefore, the number of pre-driving operations that are performed simultaneously is changed so that the power supplied from the power source 1081 does not exceed the capacity of the power source 1081.

According to the timing control of the first embodiment, prior driving operation _{B 1, B 2, B 3} , ···, when B _N is executed, the maximum value of the supply current drive one motor 1041 The power supply current is limited to the power supply current required to make the power supply current uniform in time, and a large peak does not occur in the power supply current. This means that when the zero calibration is simultaneously performed in the light source color measuring devices P ₁ , P ₂ , P ₃ ,..., P _N , the drive operations B ₁ , B ₂ , B ₃ ,. light source color measuring device P ₁ when B _N is _{executed, P 2, P 3, ···} , prevent the power supplied is greater than the capacity of the power source 1081 from the power supply 1081 by electric power supplied to the P _N To do. 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.

1.8 Reason for Simultaneously Performing Light Source Color Measurement In the first embodiment, prior driving operations B ₁ , B ₂ , B ₃ ,..., B _N are performed at different timings TB ₁ , TB ₂ , TB ₃ , ..., by running each in TB _N, a large peak is prevented occur supply current. Therefore, pre-driving operation _{B 1, B 2, B 3} , ···, B N are mutually different timings _{TB 1, TB 2, TB 3} , ···, as long as they are executed respectively in TB _N, light source color measurement _{M 1, M 2, M 3} , ···, the timing of M _N is executed is also considered optional. However, in the first embodiment, the light source color measurements M ₁ , M ₂ , M ₃ ,..., M _N are simultaneously performed for the following reasons, and the light source color measurement devices P ₁ , P ₂ , P ₃ , ..., calibration is performed at P _{N at} the same time.

(1) light source color measuring instrument _{P 1, P 2, P 3} , ···, if calibrated simultaneously in P _N is not performed, the influence of the temperature variation occurs. Thus, light source color measuring instrument _{P 1, P 2, P 3} , ···, be calibrated simultaneously in P _N is made is desired.

(2) the signal level of the signal output from the optical sensor 1042 when the light source color measurement M _i are performed for zero calibration is low. Therefore, the light source color measurement M _i of the light source color measurement instrument P _i, the light source color measuring instrument _{P 1, ···, P i-} 1, P i + 1, ···, drive operation in P _N B _1, .., B _i−1 , B _{i + 1} ,..., B _N are easily affected by power supply noise. On the other hand, when calibration is not performed simultaneously in the light source color measurement devices P ₁ , P ₂ , P ₃ ,..., P _N , the timing at which the light source color measurement M _i is executed in the light source color measurement device P _i . , light source color measuring instrument _{P 1, ···, P i-} 1, P i + 1, ···, driving operation B ₁ at _{P N, ···, B i-} 1, B i + 1, ·· -, which may overlap with the timing when the B _N are executed, respectively. Therefore, light source color measuring instrument P _1, P _2, P _3, · · ·, if the calibration is not performed simultaneously in the P _N, light source color measurement instrument P _i source color measurement in M _i is the light source color measurement instrument P _{1 occurs, ···, P i-1,} P i + 1, ···, driving operation B ₁ in _{P N, ···, B i-} 1, B i + 1, ···, by B _N Susceptible to power supply noise. Thus, light source color measuring instrument _{P 1, P 2, P 3} , ···, be calibrated simultaneously in P _N is made is desired.

(3) If calibration is not performed at the same time in the light source color measuring devices P ₁ , P ₂ , P ₃ ,..., P _N , the prior drive operations B ₁ , B ₂ , B ₃ ,. _The timing at which _N is executed may overlap with the timing at which subsequent driving operations A ₁ , A ₂ , A ₃ ,. For this reason, if calibration is not performed at the same time in the light source color measuring devices P ₁ , P ₂ , P ₃ ,..., P _N , a large peak may occur in the power supply current. Thus, light source color measuring instrument _{P 1, P 2, P 3} , ···, be calibrated simultaneously in P _N is made is desired.

  5A to 5D and FIG. 6 are timing charts illustrating the timing at which the operations of the first comparative example are executed and the time variation of the power supply current. The timings at which the operations illustrated in FIGS. 5A to 5D and FIG. 6 are performed and the time variation of the power supply current are determined as follows. This is a case where the operation does not overlap with the timing of execution.

  7A to 7D and FIG. 8 are timing charts illustrating the timing at which the operations of the second comparative example are executed and the time variation of the power supply current. The timing at which the operations illustrated in FIGS. 7A to 7D and FIG. 8 are executed and the time variation of the power supply current are the same as the drive operation after the timing when the operations are continuously executed and the advance drive operation is executed. This is when it overlaps with the timing of execution.

The time required to execute each of the previous drive operations B ₁ , B ₂ , B ₃ ,..., B _N is X, and the subsequent drive operations A ₁ , A ₂ , A ₃ ,. each of the _N time required to perform the a is X, the light source color measurement _{M 1, M 2, M 3} , ···, the time required to perform each of the M _N is Y, the light source color measurement instrument When the number is N, conditions for limiting the maximum value of the power supply current to the power supply current required to drive one motor 1041, that is, as shown in FIGS. 5A to 5D and FIG. advance driving operation _{B 1, B 2, B 3} , ···, the timing TB ₁ to B _N are executed _{respectively, TB 2, TB 3, ···} , TB N is the posterior of the drive operation a _1, a ₂ , a _3, · · ·, timing TA ₁ that a _N are executed respectively, TA _2, TA _3, · · ·, conditions that do not overlap with the TA _N of the formula (1) It is to be Tasa.

  N · X ≦ Y (1)

When the optical path 1060 is blocked by the shutter 1040 and the signal level of the signal output from the optical sensor 1042 is low, the time for taking in the signal is adjusted by the charge storage means or the like, and the measurement performance is ensured. Therefore, the time Y becomes longer. However, when the noise performance of the circuit that captures the signal is good and the time Y can be shortened, equation (1) may not be satisfied when the number N is large. In this case, for example, as shown in FIGS. 7A to 7D and FIG. 8, the timing TB _N at which the previous driving operation B _N is executed overlaps the timing TA _{1 at} which the subsequent driving operation A ₁ is executed, and the power supply A large peak occurs in the current.

2 Second Embodiment The second embodiment differs from the light source color measurement system of the first embodiment in the timing at which various operations are executed.

  The main difference between the first embodiment and the second embodiment is that, in the first embodiment, two or more light source color measurement devices do not execute the driving operation before and after, but the second embodiment. In the embodiment, the two light source color measuring devices perform the pre- and post-drive operations at the same time. The configuration employed in the first embodiment may be employed in the second embodiment within a range that does not hinder the adoption of the configuration that causes the main difference.

  9A to 9F and FIG. 10 are timing charts illustrating the timing at which various operations of the second embodiment are executed and the time variation of the power supply current.

The timing at which the operations illustrated in FIGS. 9A to 9F and FIG. 10 are executed and the time variation of the power supply current are determined by the light source color measuring devices P ₁ , P ₂ , P ₃ , P _{4 ,. 1} , P _N mode is the calibration mode, and zero calibration is simultaneously performed in the light source color measuring devices P ₁ , P ₂ , P ₃ , P ₄ ,..., P _N−1 , P _N. . Power supply current shown in FIG. 10, light source color measuring instrument P ₁ from the power source 1081 for the pre-drive operation and post driving _{operation, P 2, P 3, P} 4, ···, P N-1, It is a time change of the current supplied to _PN .

  In the second embodiment, it is determined that the number of motors 1041 that can be driven simultaneously is two.

As shown in FIGS. 9A to 9F and FIG. 10, the light source color measuring devices P ₁ , P ₂ , P ₃ , P ₄ ,..., P _N−1 , P _N are the drive operations B ₁ , B ₂ , B ₃ , B ₄ ,..., B _N−1 , B _N are executed, respectively, and light source color measurements M ₁ , M ₂ , M ₃ , M ₄ ,. _N-1 and _MN are respectively executed, and the subsequent drive operations A ₁ , A ₂ , A ₃ , A ₄ ,..., A _N-1 and A _N are respectively executed.

Advance driving operation _{B 1, B 3, ···,} B N-1 , the timing TB _1, TB _3, · · ·, are performed respectively in TB _N-1. Pre driving operation _{B 2, B 4, ···,} B N , the timing TB _1, TB _3, · · ·, are performed respectively in TB _N-1. The light source color measurements M ₁ , M ₂ , M ₃ , M ₄ ,..., M _N−1 , M _N are simultaneously executed at the timing TM. Post driving operation _{A 1, A 3, ···,} A N-1 , the timing TA _1, TA _3, · · ·, are performed respectively in TA _N-1. Post driving operation _{A 2, A 4, ···,} A N is the timing TA _1, TA _3, · · ·, are performed respectively in TA _N-1.

Therefore, the control unit 1101 performs zero calibration simultaneously on the light source color measuring devices P ₁ , P ₂ , P ₃ , P ₄ ,..., P _N−1 , P _{N and} performs light source color measurements M ₁ , M ₂ , When M ₃ , M ₄ ,..., M _N−1 , M _N are executed at the same time, the timing TB _{i at} which the prior drive operations B _i and B _{i + 1} are executed is the advance drive operation B _{1, ···, B i-1} , B i + 2, ···, timing TB ₁ to B _N is _{run, ···, TB i-2,} TB i + 2, ···, TB N _The light source color measuring devices P ₁ , P ₂ , P ₃ , P ₄ ,..., P _N−1 , P _N are controlled differently from ₋₁ . i is an integer 1, 3,..., N−1. The prior drive operations B _i and B _{i + 1} are included in the prior drive operations B ₁ , B ₂ , B ₃ , B ₄ ,..., B _N−1 , B _N. The prior drive operations B ₁ ,..., B _i−1 , B _{i + 2} ,..., B _N are the prior drive operations B ₁ , B ₂ , B ₃ , B ₄ ,. _Although included in _N−1 and B _N , they are different from the previous driving operations B _i and B _{i + 1} . Accordingly, the control unit 1101 causes the light source color measurement devices P ₁ and P ₁ to prevent the power supplied from the power source 1081 from exceeding the capacity of the power source 1081 when the previous driving operations B _i and B _{i + 1} are executed. ₂ , P ₃ , P ₄ ,..., P _N−1 , P _N are controlled.

According to the timing control of the second embodiment, the maximum value of the power supply current when the prior drive operations B ₁ , B ₂ , B ₃ , B ₄ ,..., B _N−1 , B _N are executed. Is limited to the power supply current required to drive the two motors 1041, and a large peak does not occur in the power supply current. This light source color measuring instrument _{P 1, P 2, P 3} , P 4, ···, when the zero calibration is performed simultaneously in P _N-1, P _N, in advance of the driving operation B _1, B ₂ , B _3, B ₄ power,..., light source color measuring instrument P ₁ when B _N-1, B _N is performed, P _2, P _3, ..., the power supplied to P _N The power supplied from 1081 is prevented from exceeding the capacity of the power supply 1081.

Further, according to the timing control of the second embodiment, the time required for executing the prior driving operations B ₁ , B ₂ , B ₃ , B ₄ ,..., B _N−1 , B _N is the first time. The prior drive operations B ₁ , B ₂ , B ₃ ,..., B _{N in} the embodiment are reduced to half of the time required.

  The second embodiment is employed when the capacity of the power source 1081 is larger than the capacity required to drive the two motors 1041. When the capacity of the power source 1081 is larger than the capacity necessary for driving the three or more motors 1041, the pre- and post-driving operations may be executed simultaneously in the three or more light source color measuring instruments.

3 Comparative Example FIGS. 11A to 11D and FIG. 12 are timing charts illustrating various operation timings and time variation of the power supply current of the third comparative example.

Time variation of the timing and the power supply current of the various operations illustrated in FIG 11A~ to 11D and 12, light source color measuring instrument _{P 1, P 2, P 3} , ···, the mode of P _N be a calibration mode light source color measuring device _{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. 12 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 shown in FIG. 11A to FIG. 11D and FIG. 12, the light source color measuring devices P ₁ , P ₂ , P ₃ ,..., P _N have the driving operations B ₁ , B ₂ , B ₃ ,. , B _N, and light source color measurements M ₁ , M ₂ , M ₃ ,..., M _N for zero calibration, respectively, and subsequent drive operations A ₁ , A ₂ , A ₃ , ..., A _N are executed.

The prior drive operations B ₁ , B ₂ , B ₃ ,..., B _N are executed simultaneously at the timing TB. The light source color measurements M ₁ , M ₂ , M ₃ ,..., _MN are simultaneously executed at the timing TM. Subsequent drive operations A ₁ , A ₂ , A ₃ ,..., A _N are executed simultaneously at timing TA.

  In this case, a large peak of the power supply current occurs at each of the timings TB and TA, and the power supplied from the power supply 1081 may reach the capacity of the power supply 1081.

  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 control device and 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 ,..., P _N−1 , P _N light source color measurement device P light source color measurement device B ₁ , B ₂ , B ₃ , B ₄ ,..., B _N-1 , B _N advance drive operation M ₁ , M ₂ , M ₃ , M ₄ ,..., M _N-1 , M _N light source color measurement A ₁ , A ₂ , A ₃ , A ₄ ,..., A _N-1 , A _N post drive operation

Claims (7)

N is an integer equal to or greater than 2, and the first to Nth driving operations are respectively performed, the first to Nth color measurements are respectively performed, and the first to Nth driving operations are respectively An interface to which the first to Nth color measurement devices, which are driving operations for preparation of the first to Nth color measurements, are connected;
When the first to Nth color measurements are performed simultaneously, the timing at which the first at least one driving operation included in the first to Nth driving operations is performed is from the first to the first. The first to Nth color measuring devices are different from the timing at which the second at least one driving operation included in the Nth driving operation and different from the first at least one driving operation is executed. A control unit to control;
A power supply for supplying power to the first to Nth color measuring devices;
A control device comprising: The first to Nth color measuring devices include first to Nth motors, respectively.
2. The control device according to claim 1, wherein the first to Nth driving operations include driving of the first to Nth motors, respectively. The first to Nth color measuring devices include first to Nth photosensors, respectively, and first to Nth shutters, respectively.
The first to Nth photosensors are used for the first to Nth color measurements, respectively.
The first to Nth shutters respectively block or open the optical paths of light incident on the first to Nth photosensors, and the first to Nth motors are driven. The control device according to claim 2, wherein the control device is driven by each of the first to Nth motors. 4. The control device according to claim 1, wherein the first to Nth color measurements are color measurements for calibration of the first to Nth color measurement devices, respectively. 5. 5. The control unit according to claim 1, wherein the control unit changes the number of drive operations simultaneously executed in the first to Nth drive operations so that power supplied from the power source does not exceed a capacity of the power source. The control device according to any one of the above. 6. The control device according to claim 1, wherein the control unit receives first to Nth completion signals when the first to Nth driving operations are completed. 7. A control device according to any one of claims 1 to 6;
The first to Nth color measuring devices;
A color measurement system comprising.

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