JP2018146621A - Calibration device, control method thereof, program, storage medium and image display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a calibration device, a control method thereof, a program and a storage medium that suppress inconvenience at calibration execution time when calibration of an image display device is performed using a luminance meter.SOLUTION: A calibration device comprises: first acquisition means that acquires information associated with a luminance meter which measures display luminance of an image display device; second acquisition means that acquires target luminance in calibration of the image display device; prediction means that predicts whether or not the calibration is correctly performed on the basis of the information associated with the luminance meter and the target luminance; calibration means that perform the calibration; and notification means that notifies a user of the information associated with the calibration. When the prediction means predicts that the calibration is not correctly performed, the notification means notifies about a prediction result of the prediction means before the calibration is performed.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a calibration device, a control method thereof, a program, a storage medium, and an image display device.

  Conventionally, in order to realize display performance corresponding to the image signal standard of a commercial image display apparatus, a user performs calibration using a luminance meter. In calibration, a plurality of display gradations and display colors are measured with a luminance meter. The internal parameters of the image display device are changed so as to match the input image signal standard from the display gradation and display color setting values during measurement and the measurement results. Thereby, the display performance corresponding to the image signal standard of the image display apparatus is realized. At the time of this work, calibration may be executed simultaneously for a plurality of image signal standards used by the user.

In recent years, BT., Which is used as a general image signal standard, with the improvement of the light receiving performance of an imaging apparatus. A captured image having a dynamic range wider than 709 (hereinafter, such an image is referred to as an HDR image) has been generated. As a data format for handling such HDR images, for example, Cineon Log defined based on the characteristics of a film with a wide dynamic range is used. In this image signal standard, high luminance of several thousand cd / m ² is required.

By the way, in many cases, a user who needs to ensure the display quality of a business image display apparatus already has a luminance meter corresponding to the current image signal. In order to support a plurality of image signal standards, a plurality of luminance meters are required when creating software for calibrating a commercial image display apparatus. These luminance meters corresponded to the specifications for calibration of the image display apparatus used so far. Therefore, the luminance meter owned by the user may correspond to a measurable range of 0.005 to 1000 cd / m ² that is insufficient for calibration of the HDR image. In the case of a spectral luminance meter, even if the specification describes that a range of 0.0005 to 5,000 cd / m ² can be measured, there is an inconvenience when measuring the luminance of a liquid crystal display using an LED backlight. May occur. For example, a measurement error may occur even if the luminance of the liquid crystal display is about 2,000 cd / m ² and half or less of the spectrophotometer specification. This is a phenomenon that occurs due to the spectral wavelength of the LED backlight being sharp and the spectral sensor being saturated. When the image display apparatus for HDR images is calibrated with these luminance meters, if the target luminance value for calibration is high, the display luminance exceeds the measurable range, resulting in a measurement error. There has been proposed a measuring instrument to which a function for quickly setting a condition change is added by visualizing the cause of the measurement error when a measurement error occurs (for example, Patent Document 1).

JP, 2015-129640, A

However, when the above-described conventional technique is used for an image display device capable of displaying an HDR image, there is a problem such as a measurement error during calibration when the target luminance value for calibration is higher than the measurable range of the luminance meter. May occur. In particular, when a plurality of calibrations are performed at the same time, there is a problem that calibration is not completed normally and the burden on the user increases. SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a calibration device, a control method thereof, a program, and a storage medium for suppressing inconvenience at the time of calibration when an image display device is calibrated using a luminance meter. To do.

The first aspect of the present invention is:
A calibration device capable of calibrating display brightness of an image display device,
First acquisition means for acquiring information relating to a luminance meter for measuring display luminance of the image display device;
Second acquisition means for acquiring target luminance in the calibration of the image display device;
Prediction means for predicting whether or not the calibration is correctly performed based on the information on the luminance meter and the target luminance;
Calibration means for performing the calibration;
Notification means for notifying the user of information relating to the calibration;
Have
When the prediction means predicts that the calibration is not correctly executed, the notification means notifies the prediction result of the prediction means before the calibration is executed. It is.

The second aspect of the present invention is:
A calibration device capable of calibrating display brightness of an image display device,
Obtaining means for obtaining information relating to a luminance meter for measuring the display luminance of the image display device;
Prediction means for predicting whether or not the calibration is correctly performed based on information on the luminance meter;
Calibration means for performing the calibration;
Notification means for notifying the user of information relating to the calibration;
Have
The information on the luminance meter includes information on the occurrence of a measurement value or a measurement error of the image display device that displays target luminance by the luminance meter,
The prediction means includes
Based on information about the luminance meter, determine whether a measurement error has occurred in the luminance meter,
If it is determined that a measurement error has occurred, predict that the calibration will not be performed correctly,
When it is determined that no measurement error has occurred, the calibration is predicted to be executed correctly,
When the prediction means predicts that the calibration is not correctly executed, the notification means notifies the prediction result of the prediction means before the calibration is executed. It is.

The third aspect of the present invention is:
A calibration device capable of calibrating display brightness of an image display device,
Obtaining means for obtaining a target luminance in calibration of the image display device;
Predicting means for predicting whether or not the calibration is correctly executed based on the target brightness and the threshold;
Calibration means for performing the calibration;
Notification means for notifying the user of information relating to the calibration;
Have
The prediction means includes
Predicting that the calibration is performed correctly when the target brightness is less than or equal to the threshold;
Predicting that the calibration will not be performed correctly if the target brightness exceeds the threshold;
When the prediction means predicts that the calibration is not correctly executed, the notification means notifies the prediction result of the prediction means before the calibration is executed. It is.

The fourth aspect of the present invention is:
A calibration device capable of calibrating display brightness of an image display device,
First acquisition means for acquiring information relating to a luminance meter for measuring display luminance of the image display device;
Second acquisition means for acquiring information relating to the image display device;
Determining means for determining a settable range of target luminance in the calibration based on information on the image display device and information on the luminance meter;
Notification means for notifying a user of a settable range of the target luminance;
It is a calibration apparatus characterized by having.

According to a fifth aspect of the present invention,
A calibration device control method capable of executing calibration of display brightness of an image display device,
A first acquisition step of acquiring information relating to a luminance meter for measuring the display luminance of the image display device;
A second acquisition step of acquiring a target luminance in calibration of the image display device;
A prediction step of predicting whether the calibration is correctly performed based on the information on the luminance meter and the target luminance;
A calibration step for performing the calibration;
A notification step of notifying the user of information relating to the calibration;
Have
In the prediction step, when it is predicted that the calibration is not correctly executed, the notification step notifies the prediction result in the prediction step before the calibration is executed. This is a control method of the motion device.

The sixth aspect of the present invention is:
A calibration device control method capable of executing calibration of display brightness of an image display device,
An acquisition step of acquiring information relating to a luminance meter for measuring the display luminance of the image display device;
A predicting step of predicting whether the calibration is correctly performed based on information on the luminance meter;
A calibration step for performing the calibration;
A notification step of notifying the user of information relating to the calibration;
Have
The information on the luminance meter includes information on the occurrence of a measurement value or a measurement error of the image display device that displays target luminance by the luminance meter,
In the prediction step,
Based on information on the luminance meter, it is determined whether a measurement error has occurred in the luminance meter,
If it is determined that a measurement error has occurred, it is predicted that the calibration will not be performed correctly,
When it is determined that no measurement error has occurred, the calibration is predicted to be performed correctly,
In the prediction step, when it is predicted that the calibration is not correctly executed, the notification step notifies the prediction result in the prediction step before the calibration is executed. This is a control method of the motion device.

The seventh aspect of the present invention is
A calibration device control method capable of executing calibration of display brightness of an image display device,
An acquisition step of acquiring a target luminance in the calibration of the image display device;
A predicting step of predicting whether or not the calibration is correctly executed based on the target brightness and a threshold;
A calibration step for performing the calibration;
A notification step of notifying the user of information relating to the calibration;
Have
In the prediction step,
If the target brightness is below a threshold, the calibration is predicted to be performed correctly,
If the target brightness exceeds the threshold, it is predicted that the calibration will not be performed correctly,
In the prediction step, when it is predicted that the calibration is not correctly executed, the notification step notifies the prediction result in the prediction step before the calibration is executed. This is a control method of the motion device.

The eighth aspect of the present invention is
A calibration device control method capable of executing calibration of display brightness of an image display device,
A first acquisition step of acquiring information relating to a luminance meter for measuring the display luminance of the image display device;
A second acquisition step of acquiring information relating to the image display device;
A determination step for determining a settable range of target luminance in the calibration based on information on the image display device and information on the luminance meter;
A notification step of notifying a user of a settable range of the target brightness;
It is a control method of the calibration apparatus characterized by having.

  A ninth aspect of the present invention is a program for causing a computer to execute each step of the calibration apparatus control method according to the present invention.

  A tenth aspect of the present invention is a computer-readable storage medium that stores a program for causing a computer to execute each step of the calibration apparatus control method according to the present invention.

  According to the present invention, when the image display apparatus is calibrated using a luminance meter, inconvenience at the time of executing calibration is suppressed.

The figure which shows an example of the system configuration | structure of the calibration which concerns on each Example Example of functional block diagram of calibration apparatus according to each embodiment An example of a setting screen when performing calibration according to the first embodiment Example of calibration flowchart and warning according to embodiment 1 An example of a setting screen when performing calibration according to the second embodiment An example of a flowchart showing an operation flow at the time of setting in the second embodiment Example of calibration flowchart and warning according to embodiment 2 Example of calibration flowchart and warning according to embodiment 3 Example of setting screen when performing calibration according to Embodiment 4 Example of calibration flowchart and warning according to embodiment 4 Example of calibration flowchart and warning according to embodiment 5

<Example 1>
FIG. 1 is a system configuration diagram illustrating a configuration of a system for calibrating the display device 1 using the calibration device 100 described in the first embodiment. The system shown in FIG. 1 includes a display device 1, a luminance meter 2, and a calibration device 100. The display device 1 is an image display device that displays an image based on input image data. In this embodiment, an example in which the display device 1 is a liquid crystal display device having a backlight module and a liquid crystal panel will be described, but the display device 1 is not limited to a liquid crystal display device. For example, another display device having a light emitting unit and a display panel that displays an image by transmitting light from the light emitting unit may be used. Specifically, a MEMS shutter type display device using a MEMS (Micro Electro Mechanical System) shutter as a display element may be used. A self-luminous display device may be used. Specifically, an organic EL (Electro-Luminescence) display device, a plasma display device, or the like may be used. The display device 1 can display a patch image used for calibration instructed from the calibration device 100 on the screen.

  The luminance meter 2 is a measuring device that measures the display luminance of the patch image displayed on the screen of the display device 1. The luminance meter 2 can also measure the chromaticity of the display color of the patch image displayed on the screen of the display device 1. The luminance meter 2 has a measurable luminance range (hereinafter also referred to as “measurable range”) set in advance. Some luminance meters 2 have a plurality of measurable ranges. In that case, the user can select an arbitrary measurable range from a plurality of measurable ranges.

The calibration device 100 is a control device that calibrates the display luminance of the display device 1 using the display luminance or display color acquired from the luminance meter 2. For example, it is assumed that the calibration device 100 is a personal computer (PC) connected to the display device 1 and the luminance meter 2. Note that the calibration apparatus 100 may constitute one display apparatus together with the display apparatus 1. The calibration device 100 may be built in the luminance meter 2. Note that the calibration in this specification refers to, for example, a table (hereinafter also referred to as “correspondence table”) indicating a correspondence relationship between display luminance control values and luminance to be actually displayed, which the display device 1 has. Work to calibrate is assumed.

  FIG. 2 is a functional block diagram of the calibration apparatus 100 described in the first embodiment. The luminance setting unit 101 is a setting unit that sets a display luminance target value (target luminance value) when the display device 1 displays all white. As the target brightness value, a value input by the user may be used, or a preset value may be used. The measurement range acquisition unit 102 acquires the measurable range of the luminance meter used for calibration. The determination unit 103 determines whether or not the calibration is correctly executed when the calibration is executed from the target luminance value set by the luminance setting unit 101 and the measurable range of the measurement range acquisition unit 102. “Calibration is executed correctly” means that the calibration is completed without any error during the execution of the calibration, and that the user does not feel uncomfortable during the calibration. For the determination, for example, an error signal indicating the occurrence of an error during calibration may be used.

  The notification unit 104 notifies the user of a prediction result related to calibration by the determination unit 103 and various types of information related to calibration. Note that the notification means may be a display of an image such as text or graphic image via a display device, a voice via a speaker or the like, or a combination thereof. For example, the notification unit 104 generates a warning image for notifying the user that an error may occur when calibration is executed, and outputs the warning image to the display device 1. In this embodiment, the information to be notified is displayed on the display device 1, but the calibration device 100 may have its own display means. In addition, the notification unit 104 may notify the user of a warning with a notification sound such as a buzzer sound. Further, the notification unit 104 may notify various kinds of information related to calibration by voice.

  The communication unit 105 is a communication interface that communicates with the luminance meter 2. For example, the communication unit 105 acquires a display luminance measurement value or a display color measurement result from the luminance meter 2. Note that the communication unit 105 may acquire information indicating the model of the connected luminance meter 2, information indicating a measurable range, and information regarding the success or failure of measurement (such as occurrence of a measurement error). The communication unit 106 is a communication interface that communicates with the display device 1. The communication unit 106 transmits, for example, a calibration value and a signal indicating a patch image to be displayed to the display device 1. In addition, the communication unit 106 outputs a user interface image for the user to operate the calibration device 100. Note that the communication unit 106 may acquire information indicating the model of the connected display device 1.

  The control unit 107 is a processor for controlling each functional block of the calibration apparatus 100. Further, the control unit 107 executes calibration. For example, the control unit 107 creates a new correspondence table based on the correspondence table that the display device 1 has and the measurement value by the luminance meter 2, and controls the updated correspondence table to be transmitted to the display device 1. To do. The memory 108 stores information indicating the relationship between the model name of the luminance meter 2 and the measurable range. The input unit 109 is an input interface for the user to input information on the display device 1 and the luminance value 2. For example, it is assumed that the input unit 109 is a keyboard or a mouse. The user inputs, for example, information on the display device 1 and the luminance value 2 via the input unit 109 into the input form on the user interface image displayed on the display device 1. The calibration apparatus 100 acquires various information input by the user via the input unit 109. The information input by the user includes, for example, the model names of the display device 1 and the luminance value 2, the target luminance value in calibration, and the like.

Note that the function of each functional block included in the calibration apparatus 100 described above is realized as an operation of the control unit 107 that is a processor. Specifically, each function described above is realized by a program stored in a non-volatile memory being developed in a work memory such as a RAM (Random Access Memory) and executed by the control unit 107.

  FIG. 3 is a schematic diagram showing a setting screen (setting form 201) when performing calibration. The setting form 201 is a user interface image for the user to input information on the display device 1 and information on the luminance meter 2. The user operates the input unit 109 to input information to each input form of the setting form. The setting form 201 includes a sensor input unit 202, a display input unit 203, and a luminance input unit 204. The sensor input unit 202 is an input form in which the user inputs the model name of the luminance meter 2 used for calibration of the display device 1. The display input unit 203 is an input form for inputting the model name of the display device 1. The luminance input unit 204 is an input unit that inputs a target luminance value for all white display of the display device 1.

  FIG. 4A is a flowchart illustrating a determination process for determining whether or not to execute the calibration process performed by the calibration apparatus 100. The following processing is realized by the control unit 107 controlling each functional block.

  In step S301, the measurement range acquisition unit 102 acquires the model name of the luminance meter 2 input to the sensor input unit 202. In step S302, the measurement range acquisition unit 102 reads the measurable range corresponding to the model name of the luminance meter 2 acquired in step S301 from the memory 108, and determines the read measurable range as the measurable range in calibration. The measurement range acquisition unit 102 may acquire setting information from the luminance meter 2 via the communication unit 105, and may determine a measurable range using the acquired setting information. The information acquired from the luminance meter 2 may be information indicating different items depending on the model of the luminance meter 2 such as the type of measurement probe, the measurement angle, and the setting of the synchronization mode. In step S <b> 303, the luminance setting unit 101 acquires a calibration target luminance value input to the luminance input unit 204. Alternatively, the luminance setting unit 101 may acquire the target luminance value stored in advance in the memory 108 or the like.

  In step S304, the determination unit 103 determines whether or not the target luminance value acquired in step S303 is included in the measurable range determined in step S302. If it is determined that the target luminance value is included in the measurable range (step S304: YES), the process proceeds to step S305. If it is determined that the target luminance value is not included in the measurable range (step S304: NO), the process proceeds to step S306.

  In step S305, the determination unit 103 predicts that the calibration is correctly executed, and the control unit 107 starts executing the calibration process. In step S306, the determination unit 103 predicts that the calibration is not correctly executed, and the notification unit 104 notifies the user of a warning. FIG. 4B is an example of a warning image. The warning image of FIG. 4B is displayed on the display device 1 by the notification unit 104 in step S306. The warning image includes, for example, information on the cause of the measurement error expected at the time of executing calibration based on the determination result of the determination unit 103. The warning image notifies the user of a range that can be set in the luminance input unit 204. The range that can be set in the luminance input unit 204 is a range in which calibration can be performed when the luminance meter set in the sensor input unit 202 is used.

According to the calibration device 100 described above, when the user calibrates the display device 1 using the luminance meter 2, it is possible to predict the possibility that a measurement error will occur at the time of calibration execution. Therefore, it is possible to prevent the calibration operation from being interrupted due to the occurrence of an error during calibration. Since the user can foresee and avoid the possibility that the calibration may be stopped, the convenience of the user calibration is improved. Further, the calibration device 100 according to the present embodiment contributes to the efficiency of the calibration work when, for example, calibration is performed on a large number of display devices at the time of shipment by the manufacturer.

<Example 2>
Hereinafter, a calibration apparatus according to the second embodiment will be described with reference to the drawings. The calibration apparatus according to the present embodiment constantly displays a range in which the target luminance value can be set. The system configuration according to the second embodiment is the same as that of FIG. The configuration of the functional blocks of the calibration apparatus 100 according to the second embodiment is the same as that of FIG. FIG. 5 is a setting screen when performing calibration according to the second embodiment. Input contents to the sensor input unit 202, the display input unit 203, and the luminance input unit 204 are the same as those in the first embodiment. A target luminance value setting range 502 is a display area for notifying the user of a target luminance value setting range that can be set during calibration. The setting range of the target luminance value that can be set at the time of calibration is determined based on the type of luminance meter input by the sensor input unit 202 and the model name of the image display device input by the display input unit 203.

  FIG. 6 is a flowchart illustrating an operation flow according to the second embodiment. The flow shown in FIG. 6 starts when, for example, the connection between the display device 1 and the luminance meter 2 is changed or when the start of calibration is instructed. More specifically, this flow is executed when the input values of the sensor input unit 202 and the display input unit 203 in FIG. 5 are changed.

  The processing in step S301 is the same as that in the first embodiment. In step S601, the measurement range acquisition unit 102 acquires the model name of the display device 1 input by the display input unit 203.

  In step S602, the measurement range acquisition unit 102 determines a range in which the target luminance value can be set based on the model name of the luminance meter 2 acquired in step S301 and the model name of the display device 1 acquired in step S601. . For example, the measurable range of the luminance meter 2 may be set as a range in which the target luminance value can be set. In this case, information regarding the display device 1 is not necessary, and the process of step S601 is not necessary. The measurable range of the luminance meter 2 may be determined from the model name of the luminance meter 2 and information corresponding to the model name and the measurable range stored in the memory 108. Alternatively, the measurement range acquisition unit 102 may acquire setting information from the luminance meter 2 and determine a measurable range. The setting information acquired from the luminance meter 2 includes, for example, the type of measurement probe, the setting of the aperture and the synchronization mode, and the like, and these items differ depending on the luminance meter model. Further, the measurable range may be determined in consideration of spectral information of light emitted from the light emitting unit of the display device 1. The range in which the target luminance value can be set may be determined in consideration of the displayable luminance of the display device 1. For example, the range in which the target luminance value can be set is within the measurable range of the luminance meter 2 and within the luminance range that can be displayed by the display device 1. In step S603, the range in which the target luminance value determined in step S602 can be set is displayed in the target luminance value setting range 502 on the setting screen shown in FIG.

FIG. 7A is a flowchart illustrating an operation flow when performing calibration according to the second embodiment. In FIG. 7A, the same symbols as those in FIGS. 4A and 6 have the same operation. In step S <b> 701, the notification unit 104 generates a warning image that notifies the user that the value input to the luminance input unit 204 is not within the range displayed in the target luminance value setting range 502. indicate. FIG. 7B is an example of a warning image displayed in step S701. The warning image in FIG. 7B notifies the user that an error has occurred in the calibration before starting the calibration.

  According to the present embodiment, a range in which the target luminance can be set is always displayed. Therefore, the user can confirm the range in which the target luminance value can be set without waiting for the display of the warning image. For example, when the user inputs a target luminance value, an appropriate target luminance value can be set after confirming the target luminance value setting range 502. Thus, an erroneous input of inputting a target luminance value outside the range displayed in the target luminance value setting range 502 is prevented, and a calibration failure is suppressed.

<Example 3>
Hereinafter, a calibration apparatus according to the third embodiment will be described with reference to the drawings. In this embodiment, provisional measurement using a luminance meter is performed before execution of calibration, and it is determined whether or not a measurement error occurs. The system configuration according to this embodiment is the same as that shown in FIG. The configuration of the calibration apparatus 100 according to the present embodiment is the same as that of FIG. The setting screen when performing calibration according to the present embodiment is the same as FIG.

  FIG. 8A is a flowchart illustrating an operation flow when performing calibration according to the third embodiment. In FIG. 8A, the steps indicated by the same reference numerals as in FIG. In step S <b> 901, the control unit 107 controls the display device 1 to display all white at the calibration target luminance value acquired in step S <b> 303. In step S902, the luminance meter 2 measures the display luminance of the display device 1 in which the target luminance value is set.

  In step S903, the determination unit 103 determines whether a measurement error has occurred as a result of the measurement in step S902. For example, a measurement value of the luminance meter 2 or a measurement error signal transmitted by the luminance meter 2 may be used for determining the occurrence of the measurement error. For example, the determination unit 103 acquires a measurement value from the luminance meter 2 via the communication unit 105 and determines that a measurement error has occurred when the measurement value exceeds a predetermined value. Alternatively, if the measurable range of the luminance meter 2 is known, it may be determined that a measurement error has occurred when the measured value is outside the measurable range. The luminance meter 2 is assumed to have a function of determining whether or not a measurement error has occurred and a function of transmitting a measurement error signal when the measurement error occurs. The determination unit 103 determines that a measurement error has occurred when a measurement error signal is received via the communication unit 105. If the determination unit 103 determines that no measurement error has occurred (step S903: NO), the process proceeds to step S305. If the determination unit 103 determines that an error has occurred (step S903: YES), the process proceeds to step S904.

  In step S904, since a measurement error has occurred in step S902, the determination unit 103 determines that calibration is not correctly executed, and notifies the user of a warning via the notification unit 104. FIG. 8B is an example of a warning image notified to the user in step S904. The warning image in FIG. 8B prompts the user to change the setting of the target brightness value before executing calibration based on the determination result determined in step S903.

  According to the calibration apparatus 100 according to the present embodiment, it is possible to predict whether or not calibration is correctly performed before calibration even when performing calibration using a luminance meter whose measurement range is unknown. Thereby, the failure of calibration is suppressed.

<Example 4>
Hereinafter, a calibration apparatus according to a fourth embodiment will be described with reference to the drawings. When it is determined that the calibration is not correctly performed, the calibration apparatus according to the present embodiment performs extrapolation calibration by extrapolating the measurement value within the measurable range of the luminance meter. The system configuration according to the present embodiment is the same as that of FIG. The configuration of the calibration apparatus 100 according to the present embodiment is the same as that of FIG. FIG. 9 is a setting screen when performing calibration according to the present embodiment. In FIG. 9, the setting form 1101 includes a sensor input unit 202, a display input unit 203, and a luminance input unit 204. In this embodiment, the following description will be given assuming that the measurable range of the luminance meter 2 is 0.005 to 1000 cd / m ² .

In FIG. 9, the target luminance value 2000 cd / m ² set in the luminance input unit 1102 is outside the measurable range of the luminance meter 2. FIG. 10A is a flowchart showing an operation flow when performing calibration according to the content of the setting screen of FIG. In FIG. 10A, the operations in step S301 to step S303 and step S305 are the same as those in FIG.

  In step S1201, the determination unit 103 determines whether or not the set value of the calibration target luminance value acquired in step S303 is included in the measurable range determined in step S302. If the target luminance value is included in the measurable range (step S1201: YES), it is determined that calibration is correctly executed, and the process proceeds to step S305. When the target luminance value is not included in the measurable range (step S1201: NO), it is determined that the calibration is not correctly executed, and the process proceeds to step S1202.

  In step S1202, a warning is displayed because the set value of the target luminance value exceeds the measurable range. FIG. 10B is an example of a warning notified to the user. In the example of the warning image in FIG. 10B, a warning is given that an error has occurred during calibration, and the user is notified that extrapolation using an extrapolated value of the measurement value of the luminance meter 2 is executed. . In step S1203, the control unit 107 performs extrapolation calibration.

Hereinafter, an example of an extrapolation calibration method will be described. As described above, the measurable range of the luminance meter 2 of the present embodiment is 0.005 to 1000 cd / m ² . When the target luminance value is set to 2000 cd / m ² , the luminance value is 1 / N (N is an integer) of the luminance that can be measured with the luminance meter 2 at 1000 cd / m ² or less that is the luminance that can be measured with the luminance meter 2. Temporary calibration is performed by setting the temporary target luminance value. After provisional calibration, the brightness setting is multiplied by N and adjustment is performed to the measurable range of the luminance meter 2, and the portion exceeding the measurable range is estimated from the adjusted range, and the adjustment value of the extrapolated portion Is required.

  According to the present embodiment, even if the target luminance value is outside the measurable range of the luminance meter 2, calibration with high accuracy using the extrapolated value of the measured value can be performed. Further, the user can grasp that the extrapolation calibration has been performed by the warning display. Note that an extrapolation calibration execution button and a cancel button may be provided in the warning image so that the user can determine whether or not to perform extrapolation calibration. As a result, the user can select an appropriate method of resetting the target luminance and executing normal calibration or extrapolation calibration.

<Example 5>
Hereinafter, a calibration apparatus according to Embodiment 5 will be described with reference to the drawings. The calibration apparatus according to the present embodiment displays a warning when the target luminance value is too high. The system configuration according to the present embodiment is the same as that of FIG. The configuration of the calibration apparatus 100 according to the present embodiment is the same as that of FIG. The setting screen of the present embodiment is the same as that of FIG.

  FIG. 11A is a flowchart illustrating an operation flow when performing calibration according to the fifth embodiment in accordance with the setting on the setting screen illustrated in FIG. 9. In FIG. 11A, the operations in step S303 and step S305 are the same as those in FIG.

In step S1401, the determination unit 103 determines whether the setting value of the calibration target luminance value acquired in step S303 is higher than a threshold value. For example, a luminance value in a range that can be measured by a general luminance meter may be set as the threshold value. As a result, for example, calibration failure based on an extremely high target luminance value due to erroneous input, which is not intended by the user, is suppressed. In addition, the luminance that affects the user due to glare or the like may be grasped in advance through experiments or investigations, and the luminance may be set as a threshold value. This prevents the user from feeling uncomfortable during calibration, such as extreme glare. For example, according to the knowledge of the inventors, 1000 cd / m ² or more is assumed as the luminance that affects the user due to glare or the like. If the set value of the target luminance value is higher than the threshold value (step S1401: YES), the process proceeds to step S1402. If the set value of the target luminance value is equal to or less than the threshold value (step S1401: YES), the process proceeds to step S305.

  In step S1402, a warning is notified to the user. FIG. 11B is an example of a warning image notified to the user in step S1402. The warning image in FIG. 11B warns the user that there is a possibility of being affected by glare or the like. In step S1403, the determination unit 103 determines whether to execute calibration based on a user input. For example, the user can select whether to execute calibration by selecting either the execution button 1501 or the cancel button 1502 in the warning image in FIG. 11B via the input unit 109. If the user selects execution button 1501 (step S1403: YES), the process proceeds to step S305. If the user selects the cancel button 1502 (step S1403: NO), this flow ends.

  According to the calibration apparatus 100 according to the present embodiment, inadvertent calibration failure is prevented in advance, for example, when the user mistakenly sets a high target luminance value. Also, it is possible to prevent the user from feeling uncomfortable such as glare during calibration.

(Other examples)
The present invention supplies a program that realizes one or more functions of the above-described embodiments to a system or apparatus via a network or a storage medium, and one or more processors in a computer of the system or apparatus read and execute the program This process can be realized. It can also be realized by a circuit (for example, ASIC) that realizes one or more functions.

  In addition, Examples 1-5 are an example to the last, and the structure obtained by changing suitably and changing the structure of Examples 1-5 within the range of the summary of this invention is also contained in this invention. Configurations obtained by appropriately combining the configurations of Examples 1 to 5 are also included in the present invention.

  In Examples 1 to 5, notification to the user was made by image display by a display device. However, the notification means is not limited to this, and may be made by voice, for example. For example, the warning for the user may be made by a sound such as a buzzer sound. Various information such as the content of the warning and the measurable range of the luminance meter may be notified to the user by voice.

  In Examples 1 to 5, as shown in FIG. 1, the calibration device 100 is separate from the display device 1 and the luminance meter 2. However, the calibration device 100 may be built in the display device 1. Alternatively, the calibration device 100 may be built in the luminance meter 2.

  In addition, each function part of the apparatus of Examples 1-5 may be an individual hardware, and may not be so. The functions of two or more functional units may be realized by common hardware. Each of a plurality of functions of one functional unit may be realized by individual hardware. Two or more functions of one functional unit may be realized by common hardware. Each functional unit may be realized by hardware or not. For example, the apparatus may include a processor and a memory in which a control program is stored. The functions of at least some of the functional units included in the apparatus may be realized by the processor reading and executing the control program from the memory.

1: Display device 2: Luminance meter 100: Calibration device 103: Determination unit
104: Notification unit 107: Control unit 109: Input unit

Claims (23)

A calibration device capable of calibrating display brightness of an image display device,
First acquisition means for acquiring information relating to a luminance meter for measuring display luminance of the image display device;
Second acquisition means for acquiring target luminance in the calibration of the image display device;
Prediction means for predicting whether or not the calibration is correctly performed based on the information on the luminance meter and the target luminance;
Calibration means for performing the calibration;
Notification means for notifying the user of information relating to the calibration;
Have
When the prediction means predicts that the calibration is not correctly executed, the notification means notifies the prediction result of the prediction means before the calibration is executed. . The information about the luminance meter includes at least one of a model name or a measurable range of the luminance meter,
The prediction means includes
Obtaining a measurable range of the luminance meter based on information about the luminance meter;
Predicting that the calibration will be performed correctly if the target brightness is within the measurable range;
The calibration apparatus according to claim 1, wherein when the target luminance is not included in the measurable range, the calibration is predicted not to be performed correctly. The calibration apparatus according to claim 2, wherein the notification unit further notifies the measurable range of the luminance meter. When the target luminance is not included in the measurable range, the calibration unit performs calibration using an extrapolated value of a measured value within the measurable range by the luminance meter. The calibration apparatus according to claim 2 or 3. A calibration device capable of calibrating display brightness of an image display device,
Obtaining means for obtaining information relating to a luminance meter for measuring the display luminance of the image display device;
Prediction means for predicting whether or not the calibration is correctly performed based on information on the luminance meter;
Calibration means for performing the calibration;
Notification means for notifying the user of information relating to the calibration;
Have
The information on the luminance meter includes information on the occurrence of a measurement value or a measurement error of the image display device that displays target luminance by the luminance meter,
The prediction means includes
Based on information about the luminance meter, determine whether a measurement error has occurred in the luminance meter,
If it is determined that a measurement error has occurred, predict that the calibration will not be performed correctly,
When it is determined that no measurement error has occurred, the calibration is predicted to be executed correctly,
When the prediction means predicts that the calibration is not correctly executed, the notification means notifies the prediction result of the prediction means before the calibration is executed. . A calibration device capable of calibrating display brightness of an image display device,
Obtaining means for obtaining a target luminance in calibration of the image display device;
Predicting means for predicting whether or not the calibration is correctly executed based on the target brightness and the threshold;
Calibration means for performing the calibration;
Notification means for notifying the user of information relating to the calibration;
Have
The prediction means includes
Predicting that the calibration is performed correctly when the target brightness is less than or equal to the threshold;
Predicting that the calibration will not be performed correctly if the target brightness exceeds the threshold;
When the prediction means predicts that the calibration is not correctly executed, the notification means notifies the prediction result of the prediction means before the calibration is executed. . The calibration according to any one of claims 1 to 6, wherein when the prediction unit predicts that the calibration is correctly performed, the calibration unit performs the calibration. apparatus. A calibration device capable of calibrating display brightness of an image display device,
First acquisition means for acquiring information relating to a luminance meter for measuring display luminance of the image display device;
Second acquisition means for acquiring information relating to the image display device;
Determining means for determining a settable range of target luminance in the calibration based on information on the image display device and information on the luminance meter;
Notification means for notifying a user of a settable range of the target luminance;
A calibration apparatus comprising: 9. The calibration apparatus according to claim 1, wherein the notification unit includes a display unit that displays at least either text or graphics. The calibration apparatus according to claim 1, wherein the notification unit includes a voice unit that emits a voice. An image display device comprising the calibration device according to claim 1. A calibration device control method capable of executing calibration of display brightness of an image display device,
A first acquisition step of acquiring information relating to a luminance meter for measuring the display luminance of the image display device;
A second acquisition step of acquiring a target luminance in calibration of the image display device;
A prediction step of predicting whether the calibration is correctly performed based on the information on the luminance meter and the target luminance;
A calibration step for performing the calibration;
A notification step of notifying the user of information relating to the calibration;
Have
In the prediction step, when it is predicted that the calibration is not correctly executed, the notification step notifies the prediction result in the prediction step before the calibration is executed. Control method of the navigation device. The information about the luminance meter includes at least one of a model name or a measurable range of the luminance meter,
In the prediction step,
The measurable range of the luminance meter is acquired based on the information about the luminance meter,
When the target brightness is included in the measurable range, the calibration is predicted to be performed correctly,
13. The method of controlling a calibration device according to claim 12, wherein when the target luminance is not included in the measurable range, the calibration is predicted not to be executed correctly. The method according to claim 13, wherein the notification step further notifies the measurable range of the luminance meter. When the target luminance is not included in the measurable range, in the calibration step, calibration using an extrapolated value of the measured value within the measurable range by the luminance meter is performed. The method of controlling a calibration device according to claim 13 or 14. A calibration device control method capable of executing calibration of display brightness of an image display device,
An acquisition step of acquiring information relating to a luminance meter for measuring the display luminance of the image display device;
A predicting step of predicting whether the calibration is correctly performed based on information on the luminance meter;
A calibration step for performing the calibration;
A notification step of notifying the user of information relating to the calibration;
Have
The information on the luminance meter includes information on the occurrence of a measurement value or a measurement error of the image display device that displays target luminance by the luminance meter,
In the prediction step,
Based on information on the luminance meter, it is determined whether a measurement error has occurred in the luminance meter,
If it is determined that a measurement error has occurred, it is predicted that the calibration will not be performed correctly,
When it is determined that no measurement error has occurred, the calibration is predicted to be performed correctly,
In the prediction step, when it is predicted that the calibration is not correctly executed, the notification step notifies the prediction result in the prediction step before the calibration is executed. Control method of the navigation device. A calibration device control method capable of executing calibration of display brightness of an image display device,
An acquisition step of acquiring a target luminance in the calibration of the image display device;
A predicting step of predicting whether or not the calibration is correctly executed based on the target brightness and a threshold;
A calibration step for performing the calibration;
A notification step of notifying the user of information relating to the calibration;
Have
In the prediction step,
If the target brightness is below a threshold, the calibration is predicted to be performed correctly,
If the target brightness exceeds the threshold, it is predicted that the calibration will not be performed correctly,
In the prediction step, when it is predicted that the calibration is not correctly executed, the notification step notifies the prediction result in the prediction step before the calibration is executed. Control method of the navigation device. 18. The calibration according to claim 12, wherein the calibration is performed in the calibration step when the calibration is predicted to be performed correctly in the prediction step. Calibration device control method. A calibration device control method capable of executing calibration of display brightness of an image display device,
A first acquisition step of acquiring information relating to a luminance meter for measuring the display luminance of the image display device;
A second acquisition step of acquiring information relating to the image display device;
A determination step for determining a settable range of target luminance in the calibration based on information on the image display device and information on the luminance meter;
A notification step of notifying a user of a settable range of the target brightness;
A control method for a calibration device, comprising: 20. The calibration device control method according to claim 12, wherein at least one of text or graphics is notified in the notification step. 21. The method of controlling a calibration device according to claim 12, wherein in the notification step, notification by voice is performed.   The program for making a computer perform each step of the control method of the calibration apparatus of any one of Claim 12 to 21.   A computer-readable storage medium storing a program for causing a computer to execute the steps of the calibration apparatus control method according to any one of claims 12 to 21.

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