WO2023189479A1 - ディスプレイ光計測装置及び光計測方法、データ処理装置並びにプログラム - Google Patents

ディスプレイ光計測装置及び光計測方法、データ処理装置並びにプログラム Download PDF

Info

Publication number
WO2023189479A1
WO2023189479A1 PCT/JP2023/009570 JP2023009570W WO2023189479A1 WO 2023189479 A1 WO2023189479 A1 WO 2023189479A1 JP 2023009570 W JP2023009570 W JP 2023009570W WO 2023189479 A1 WO2023189479 A1 WO 2023189479A1
Authority
WO
WIPO (PCT)
Prior art keywords
period
response
stimulus value
time
response function
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2023/009570
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
敏 増田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Konica Minolta Inc
Original Assignee
Konica Minolta Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Konica Minolta Inc filed Critical Konica Minolta Inc
Priority to JP2024511690A priority Critical patent/JPWO2023189479A1/ja
Priority to CN202380030218.9A priority patent/CN118946788A/zh
Priority to KR1020247026606A priority patent/KR20240134356A/ko
Publication of WO2023189479A1 publication Critical patent/WO2023189479A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Images

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J1/00—Photometry, e.g. photographic exposure meter
    • G01J1/42—Photometry, e.g. photographic exposure meter using electric radiation detectors
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J1/00—Photometry, e.g. photographic exposure meter
    • G01J1/42—Photometry, e.g. photographic exposure meter using electric radiation detectors
    • G01J1/44—Electric circuits
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J11/00—Measuring the characteristics of individual optical pulses or of optical pulse trains
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M11/00—Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/006—Electronic inspection or testing of displays and display drivers, e.g. of LED or LCD displays
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2360/00—Aspects of the architecture of display systems
    • G09G2360/16—Calculation or use of calculated indices related to luminance levels in display data

Definitions

  • the present invention relates to a display light measurement device that measures light from a display, and particularly to a display light measurement device and light measurement method suitable for measuring flicker, which is the amount of visible flickering of a display, a data processing device, and a program.
  • light emission waveforms are becoming more complex.
  • OLED Organic Light-Emitting Diode
  • light emission control that combines not only amplitude modulation but also pulse width modulation is used for gradation control in order to achieve faithful color reproduction.
  • Light emission with complex waveforms is becoming common.
  • pulse width modulation a plurality of pulse light emission controls are performed in one frame period (vertical synchronization period), and the light emission waveform is faster than the image update period, and the waveform is steep and high in amplitude.
  • a display color analyzer (one example is CA-410 manufactured by Konica Minolta, Inc.) is known as an optical measurement device that measures visible flicker on a display.
  • Such a display color analyzer is equipped with an optical sensor inside to obtain fluctuations in stimulus values and measure flicker values.
  • a sequential acquisition method that acquires instantaneous values
  • an integral acquisition method that acquires integral values over a predetermined time.
  • the sequential acquisition method has excellent high-speed performance, while the integral method has excellent low-luminance measurement performance.
  • the JEITA method is a common method for measuring flicker that occurs on displays.
  • this method can effectively measure simple light emission waveforms such as liquid crystal (LCD), it is not suitable for complex waveforms because the measured values do not match visual observation.
  • LCD liquid crystal
  • This standard convolves the acquired continuous stimulus values with TCSF (temporal contrast sensitivity function), which indicates the sensitivity characteristics of the eye to the emission frequency, to create a stimulus that takes into account the temporal response of the eye.
  • a flicker index is derived from the stimulus value.
  • the specific processing procedure is as follows. (1) Continuously acquire the stimulus value of the display that is emitting light. (2) Perform discrete Fourier transform (DFT) processing on the acquired data and convert it into a frequency spectrum. (3) Convolution the obtained frequency spectrum with TCSF and superimpose the eye characteristics. (4) Perform inverse Fourier transform (iDFT) processing to generate TCSF-superimposed stimulus values. (5) Calculate (maximum value (Max) - minimum value (Min) / average value (Ave)) of the stimulus value data on which TCSF is superimposed, and index the amount of flicker.
  • DFT discrete Fourier transform
  • iDFT inverse Fourier transform
  • the digital Fourier transform (DFT, iDFT) is an operation that assumes that the input waveform has periodicity and is synchronized, and this digital Fourier transform is incorporated into the flicker measurement method.
  • DFT digital Fourier transform
  • iDFT the digital Fourier transform
  • FIG. 6 (A) shows the light emission waveform of a display operating under the driving condition of a vertical synchronization signal (Vsync) frequency of 29.126 Hz, and the light emission control is a hybrid control of pulse width modulation and amplitude modulation. The number of pulses is 4.
  • FIG. 3B is a graph of superimposed stimulus values after digital filter processing. As shown in FIG. 5B, spike-like noise occurs in the superimposed stimulus value.
  • the object of the present invention is to provide a display light measurement device, a light measurement method, a data processing device, and a program, which are capable of performing flicker measurement with high reliability and high measurement accuracy.
  • Stimulus value acquisition means that receives the light from the display and continuously acquires the intensity corresponding to the stimulation value at regular time intervals; a setting means for setting a period of light intensity fluctuation of the display as a period of interest; determining means that uses the time of a response function representing an impulse response characteristic corresponding to a visual stimulation response as a variable, and changes and determines the time of the response function according to the period of interest set by the setting means; A digital filter that performs digital filter processing on continuous data of stimulus value intensities acquired by the stimulus value acquisition means using a response function whose time is determined by the determination means to generate data on which the visual stimulus response is superimposed.
  • a display light measurement device equipped with (2) a stimulus value acquisition means that receives the light from the display and continuously acquires the intensity corresponding to the stimulus value at regular time intervals; The continuous data of the stimulus value intensity acquired by the stimulus value acquisition means is subjected to digital filter processing using a response function representing an impulse response characteristic corresponding to the visual stimulus response, and the data on which the visual stimulus response is superimposed is obtained.
  • digital filter processing means for generating Equipped with A display light measurement device that determines a time of the response function used for digital filter processing according to the period of interest, when a period of light intensity fluctuation of the display is a period of interest.
  • the display light measuring device according to item 1 or 2 wherein the time of the response function is an integral multiple of the period of interest.
  • the display light measurement device according to any one of items 1 to 3 above, which converts the time resolution of the response function or the unit time of the stimulus value acquisition period by the stimulus value acquisition means.
  • the display light measuring device according to any one of items 1 to 4 above, wherein the acquisition cycle of the stimulus value is changed according to the cycle of interest.
  • the response function is generated from the frequency characteristics of the eye by inverse Fourier transform, 6.
  • the display light measuring device according to any one of items 1 to 5 above, wherein the frequency characteristic of the eye is adjusted in frequency resolution and number of data so as to have a desired time before inverse Fourier transformation.
  • the continuous data of the stimulus value intensities acquired in the stimulus value acquisition step is digitally filtered using a response function representing an impulse response characteristic corresponding to the visual stimulus response, and the data on which the visual stimulus response is superimposed is obtained.
  • a digital filtering step to generate including; A display light measurement method, wherein when a period of light intensity fluctuation of the display is a period of interest, a time of the response function used for digital filter processing is determined according to the period of interest.
  • the display light measurement method according to any one of items 7 to 9, wherein the time resolution of the response function or the unit time of the stimulus value acquisition period by the stimulus value acquisition means is converted.
  • the display light measurement method according to any one of items 7 to 10, wherein the acquisition period of the stimulus value is changed according to the period of interest.
  • the response function is generated from the frequency characteristics of the eye by inverse Fourier transform, 12.
  • the display light measurement method according to any one of items 7 to 11, wherein the frequency characteristic of the eye is adjusted in frequency resolution and data number so as to have a desired time before inverse Fourier transformation.
  • receiving means for receiving continuous data of stimulus value intensity obtained by receiving light from the display and continuously acquiring intensity corresponding to the stimulus value at fixed time intervals; a setting means for setting a period of light intensity fluctuation of the display as a period of interest; determining means that uses the time of a response function representing an impulse response characteristic corresponding to a visual stimulation response as a variable, and changes and determines the time of the response function according to the period of interest set by the setting means; digital filter processing for performing digital filter processing on the continuous data of stimulus value intensities received by the receiving means using a response function whose time is determined by the determining means to generate data on which the visual stimulus response is superimposed; means and A data processing device equipped with (14) receiving means for receiving continuous data of stimulus value intensity obtained by receiving light from the display and continuously acquiring intensity corresponding to the stimulus value at fixed time intervals; Digital filter processing is performed on the continuous data of stimulus value intensities received by the receiving means using a response function representing an impulse response characteristic corresponding to a visual stimulus response to generate data on which the visual stimulus response is super
  • digital filter processing means Equipped with A data processing device that determines a time of the response function used for digital filter processing according to the period of interest, when the period of light intensity fluctuation of the display is the period of interest.
  • the data processing device according to any one of items 13 to 16 wherein the acquisition period of the stimulus value is changed according to the period of interest.
  • the response function is generated from the frequency characteristics of the eye by inverse Fourier transform, 18.
  • step and A program that causes a computer to execute (20) a receiving step of receiving continuous data of stimulus value intensity obtained by receiving light from the display and continuously acquiring intensity corresponding to the stimulus value at fixed time intervals; Digital filter processing is performed on the continuous data of stimulus value intensities received in the receiving step using a response function representing an impulse response characteristic corresponding to a visual stimulus response to generate data on which the visual stimulus response is superimposed. a digital filtering step; make the computer run A program for causing the computer to execute a process of determining a time of the response function used for digital filter processing according to the period of interest, when the period of light intensity fluctuation of the display is the period of interest. (21) The program according to item 19 or 20, wherein the time of the response function is an integral multiple of the period of interest.
  • the response function is generated from the frequency characteristics of the eye by inverse Fourier transform, 24.
  • Digital filter processing is performed on continuous intensity data using a response function representing an impulse response characteristic corresponding to a visual stimulus response.
  • the time of the response function is determined according to the cycle of light intensity fluctuation of the display, which is the cycle of interest.
  • the average luminance values in the period going back in time will match, making it possible to avoid offset even in the case of a steep emission waveform, and obtaining a superimposed stimulus value in which the generation of spike-like noise is suppressed. By using this superimposed stimulus value, it is possible to perform flicker measurement with high robustness while ensuring measurement accuracy.
  • continuous data of the stimulus value intensity obtained by receiving the light of the display and continuously acquiring the intensity corresponding to the stimulus value at fixed time intervals is received.
  • the time of the response function is adjusted according to the period of interest, which is the period of light intensity fluctuation of the display.
  • a computer can be made to execute the processing to be determined.
  • FIG. 1 is a block diagram showing the configuration of a display light measurement system according to a first embodiment of the present invention.
  • FIG. 3 is a waveform diagram showing an example of impulse response characteristics corresponding to a visual stimulation response.
  • (A) is a diagram showing an example of the light emission waveform of the display
  • (B) is a waveform diagram of the response function used
  • (C) is a waveform diagram of superimposed stimulus value data generated by digital filter processing.
  • FIG. 2 is a block diagram showing the configuration of a display light measurement device according to a second embodiment of the present invention.
  • FIG. 3 is a waveform diagram showing an example of the frequency characteristics of the eye.
  • 2A and 2B are diagrams for explaining conventional problems, in which (A) is a diagram showing an example of a light emission waveform of a display, and (B) is a waveform diagram of superimposed stimulus value data generated by digital filter processing.
  • FIG. 1 is a block diagram showing the functional configuration of a display light measurement system (hereinafter also simply referred to as an optical measurement system) 10 using a data processing device according to an embodiment of the present invention.
  • a display light measurement system hereinafter also simply referred to as an optical measurement system
  • the optical measurement system 10 includes a measurement head 20, a personal computer (PC) 30 as a data processing device, an operation section 11 for the PC, and a display section 12.
  • PC personal computer
  • the measurement head 20 includes a light condensing section 2, an optical path branching section 3, and a stimulus value acquisition section 4.
  • the condensing unit 2 is composed of a condensing lens, etc., and condenses the light emitted from the display, which is the object to be measured.
  • the optical path branching section 3 branches the optical path of the light focused by the light condensing section 2 into three.
  • the stimulus value acquisition unit 4 uses three branched optical paths by the optical path branching unit 3, and includes an optical sensor (X) 41a, an optical sensor (Y) 41b, and an optical sensor (Z) 41c that receive light from each optical path, and an output unit. 42, and has a function of continuously acquiring the output of each optical sensor 41a to 41c at a fixed time interval corresponding to the sampling frequency by the output unit 42, and converting it into continuous data of stimulus value intensity.
  • the output of the optical sensor (Y) 41b is also used for flicker measurement.
  • the optical sensors 41a to 41c may be of a tristimulus value direct reading type or a spectroscopic type.
  • Stimulus values to be converted include, for example, luminance, chromaticity (xy), and tristimulus values indicated by XYZ.
  • filter processing may be performed to remove noise. For example, moving average processing using previous and subsequent data may be applied.
  • the output section 42 includes a total of three current integrating circuits, one for each of the three optical sensors 41a to 41c, and a total of three A/C circuits, one after each current integrating circuit. Equipped with a D converter.
  • the output unit 42 acquires data from each of the optical sensors 41a to 41c using an integration method using a current integration circuit.
  • the integral method has an excellent S/N ratio, so it can improve measurement accuracy.
  • the integral method has the disadvantage that it cannot increase the data acquisition speed like the sequential method, but this does not pose a problem in flicker measurement applications because the human visual response is slow.
  • the outputs of each of the optical sensors 41a to 41c are acquired at a period of, for example, 333.3 ⁇ sec.
  • the data acquisition cycle may be changed depending on the type of display to be measured, driving conditions, etc. For example, if the driving condition is amplitude modulation driving, the speed is set low to give priority to S/N, and if the driving condition is PWM modulation driving, the speed is set to high speed.
  • the PC 30 functionally includes a period of interest setting section 5 and a flicker value deriving section 7.
  • the period of interest setting unit 5 sets a period of interest, which will be described later, in order to improve the measurement stability (robustness) of flicker measurement. Since frequency and period are two sides of the same coin, a configuration may be adopted in which the period of interest is automatically calculated and set by setting the frequency of interest. In this embodiment, it is assumed that the settings are performed based on instructions from the user to the PC 30. Alternatively, as will be described later, an optical waveform frequency detection unit may be provided and the setting may be made based on the detection result of the frequency detection unit.
  • the flicker value deriving unit 7 measures flicker using the data output from the optical sensor (Y) 41b and acquired by the output unit 42 by a method described later, and includes a response storage unit 71 and a response function. It includes a determining section 72, a digital filter processing section 73, and a flicker deriving section 74.
  • the response storage unit 71 stores a response function representing an impulse response characteristic corresponding to a visual stimulus response.
  • FIG. 2 An example of an impulse response characteristic corresponding to a visual stimulus response is shown in FIG. 2.
  • the response period to be memorized is sufficient as long as it is the time until the eye response converges.
  • the eye response typically converges after 0.5 seconds.
  • the visual stimulus response which is a sensory characteristic, is highly dependent on the individual, the environment, and the display that is the object to be measured. For this reason, a plurality of response functions may be stored in the response storage section 31 and used depending on the conditions. Further, the configuration may be such that the user can store (register) the response function in the response storage section 31.
  • parameters on which the visual stimulus response depends include the measurement area of the stimulus value acquisition unit 20, brightness, color, gender, age, ambient brightness, and individuals.
  • the selection of the response function may be performed manually by the user, or may be automatically selected by the optical measurement device 1. For example, when using different colors as parameters, automatic selection can be achieved by utilizing the stimulus values acquired for flicker measurement.
  • a sensor may be provided in the optical measuring device 1, and the currently measured color may be checked by the sensor and switched automatically.
  • the response storage unit 31 does not need to be built into the data processing device 3, and may exist externally.
  • the response function may be acquired from the external response storage section 31 and processed.
  • the response function determination unit 72 uses the time of the response function selected from the plurality of response functions stored in the response storage unit 71 (also referred to as response function time) as a variable, and uses the time of interest set in the attention period setting unit 5 as a variable. Change and decide the time according to the cycle. In this embodiment, it is desirable that the time of the response function be an integral multiple of the period of interest.
  • the average luminance value in the period going back from the current time in response function time will be the same at any time, and offset can be avoided even in steep waveforms. This makes it possible to eliminate spike-like noise that occurs in superimposed stimulus values.
  • the time of the response function is derived according to the following formula (1), with a lower limit set in consideration of the time required for the eye to react. This makes it possible to set the time of the response function that shortens the invalid period (see explanation of digital filter processing below) under measurement conditions that avoid noise.
  • Time of response function ⁇ Period of interest ⁇ (natural number) ⁇ Period of interest ⁇ RoundUp (lower limit of response time/period of interest) ...Formula (1)
  • the lower limit of response time was set to 0.5 seconds.
  • the response function time was 0.515 seconds.
  • the determination of the time of the response function is not limited to the above.
  • the user may select/determine the magnification from among the magnifications for which the time of the response function is equal to or greater than the lower limit value.
  • the user may simply specify and determine the magnification.
  • the selection of magnification may be changed according to the response characteristics used for flicker measurement.
  • the response function determining unit 72 also have a function of converting the time resolution of the response function as a pre-processing of the digital filter processing.
  • the response function previously stored in the response storage unit 71 is converted to 333 ⁇ sec, which is the same as the stimulus value period, using a linear interpolation method.
  • the time interval matching method is not limited to this, and may be multidimensional interpolation. Further, the interpolation target may be continuous stimulus value data.
  • the digital filter processing unit 73 receives the continuous data of the stimulus value intensity acquired by the output unit 42 of the stimulus value acquisition unit 4, acquires the response function whose time has been determined from the response function determination unit 72, and receives the received stimulus value.
  • the continuous intensity data is digitally filtered using the acquired response function to generate data on which a visual stimulus response is superimposed (also referred to as superimposed stimulus value data in the following description).
  • the impulse response period is set to 0.5 seconds or less, at which time the eye response converges. Digital filter processing is performed using only this response of 0.5 seconds or less.
  • the timing of digital filter processing is not limited; it may be performed after successive stimulus values have been acquired, or the acquired stimulus values may be processed sequentially even if all data have not yet been acquired. .
  • the flicker deriving unit 74 derives a flicker index using the superimposed stimulus value data generated by the digital filter processing unit 73.
  • (Max-Min)/Ave is derived for the entire time period of the superimposed stimulus value data and converted into an index value (percent flicker). More preferably, measurement errors can be reduced by setting the time range for deriving the index value to a synchronized condition, that is, an integral multiple of the light emission period.
  • synchronization methods include, but are not limited to, a method using an external synchronization signal and a method in which the user inputs a synchronization frequency.
  • the flicker index derivation is not limited to the above method, and other methods such as a method of deriving an index using an area ratio (Flicker Index based on the IES method) may be used.
  • a method of deriving an index using an area ratio (Flicker Index based on the IES method) may be used.
  • the operation unit 11 is used by a user to input data and perform other operations on the optical measurement device 1 via the PC 10 .
  • the display unit 14 displays the optical waveform acquired by the output unit 42, the flicker value derived by the flicker value derivation unit 7, etc. via the PC 10.
  • the period of interest setting section 5 performs a process of setting the period of interest
  • the response function determining section 72 processes a change and determines the response function time
  • the digital filter processing section 73 performs digital filter processing
  • the flicker derivation section 74 deduces a flicker index. etc. are executed by a processor installed in the PC 30 operating according to an operation program stored in a storage unit (not shown).
  • the optical measurement system 10 includes the measurement head 20 and the data processing device 30, but one display optical measurement device (hereinafter also simply referred to as an optical measurement device) is configured.
  • the functions of the measurement head 20 and the data processing device 30 may be provided.
  • the period of interest may be set by the user directly in the optical measurement device, or may be written via the PC by communicatively connecting the optical measurement device and the PC.
  • FIG. 3(C) The superimposed stimulus value data generated by the digital filter processing unit 73 is shown in FIG. 3(C).
  • (A) in the same figure is a light emission waveform diagram of the display when the Vsync frequency is 29.126Hz, the light emission control is a hybrid control of pulse width modulation and amplitude modulation, and the number of pulses of pulse width modulation is 4.
  • (B) is the response function used.
  • FIG. 4 is a block diagram showing the functional configuration of the optical measurement device 1 according to an embodiment of the present invention.
  • the optical measuring device 1 is configured as a brightness measuring device that directly reads stimulus values, and also has a function of controlling the acquisition cycle of stimulus values.
  • the optical measurement device 1 includes a stimulus value acquisition section 4, a period of interest setting section 5, a sampling period determination section 6, and a flicker value derivation section 7 in one device. Further, the flicker value derivation section 7 includes a frequency characteristic storage section 75, a response conversion section 76, a response function determination section 72, a digital filter processing section 73, and a flicker derivation section 74.
  • the stimulus value acquisition section 4 includes one optical sensor (Y) 43 that receives light from the display, and an output that continuously acquires the output of the optical sensor 43 at a sampling period determined by the sampling period determination section 6. 44.
  • Y optical sensor
  • the period of interest setting unit 5 sets the period of interest.
  • the period of interest may be set based on the user's writing via the PC 13, but in this embodiment, a frequency detection section 51 is provided, and the period corresponding to the frequency detected by the frequency detection section 51 is optically measured.
  • the device 1 sets it as the period of interest.
  • the frequency detection unit 51 performs discrete Fourier transform (DFT) on the data obtained by pre-photometry to convert it into a frequency spectrum.
  • DFT discrete Fourier transform
  • the fluctuation frequency is derived by frequency analysis, and the period corresponding to the fluctuation frequency is set as the period of interest.
  • the detection of the frequency of interest by the frequency detection unit 51 is not limited to this method.
  • the fluctuation period (frequency) may be directly determined by waveform analysis such as an autocorrelation method instead of spectrum analysis. In this example, it is assumed that 29 Hz is detected as the frequency of interest and a period of interest corresponding to this is set.
  • the sampling period determination unit 6 determines the acquisition period of stimulus values.
  • the length of time of the response function can only be adjusted in terms of time, where the basic unit is the stimulus value acquisition cycle. Therefore, there is a limit to the degree of matching between the time of the response function and the cycle of interest, and a slight error may remain.
  • the sampling period determination unit 6 has a function of making the acquisition period of the stimulus value variable, and the acquisition period is determined according to the period of interest, and the output unit under the determined conditions. 44 obtains the stimulus value.
  • the acquisition period is determined to be 1/natural number times the response function time derived using equation (1) above (note that the response function time is already set to the period of interest by equation (1). ). Specifically, the following formula (2) is followed.
  • the method for determining the acquisition cycle is not limited to the above. Since the period of interest matches the response function time according to equation (1), for example, by setting the acquisition period to 1/natural number times the period of interest as in equation (3), a matching error reduction effect can be obtained.
  • the response storage unit 71 stores a response function representing an impulse response characteristic corresponding to a visual stimulus response.
  • the frequency characteristic of the eye is stored in the frequency characteristic storage section 75, and the frequency characteristic of the eye is converted into an impulse response by the response conversion section 76. It is configured to perform the same function as the response storage section 71 of.
  • the frequency characteristics of the eye are stored in the frequency characteristics storage unit 75.
  • the response conversion unit 76 converts this frequency characteristic into an impulse response characteristic (response function) corresponding to a visual stimulus response by performing an inverse Fourier transform process.
  • FIG. 5 shows an example of the frequency characteristics of the eye used in this embodiment.
  • a plurality of frequency characteristics may be prepared and used appropriately. Further, the configuration may be such that the user can store (register) the frequency characteristics of the eyes in the frequency characteristic storage section 71, or any frequency characteristics may be automatically selected.
  • the response function determination unit 72 uses the time of the response function selected from the plurality of frequency characteristics stored in the frequency characteristic storage unit 71 and converted by the response conversion unit 76 as a variable, and calculates the time set by the period of interest setting unit 5. The time is changed and determined according to the cycle of interest. The method of determination is the same as in the first embodiment. If the time of the response function has already been determined by the sampling period determination unit 6 or the like, the already determined value may be used.
  • the digital filter processing unit 73 receives the continuous data of the stimulus value intensity acquired by the output unit 42 of the stimulus value acquisition unit 4, acquires the response function whose time has been determined from the response function determination unit 72, and receives the received stimulus value.
  • the continuous intensity data is digitally filtered using the acquired response function to generate superimposed stimulus value data.
  • the time data of the impulse response (response function) generated by the conversion in the response conversion unit 76 is often sufficiently longer than the response period of the eye (about 0.5 seconds). For example, if the frequency characteristics are stored in 0.1 Hz increments, the response data generated by inverse Fourier transform will be 10 seconds.
  • the impulse response period is directly connected to the length of the invalid period of the superimposed stimulus value data. In this embodiment, in order to suppress the invalid period, only the first part of 0.5 seconds or less of the converted response data is used for filter processing (see FIG. 3(B)).
  • the derivation of the flicker index by the flicker derivation unit 74 is the same as in the first embodiment, so a description thereof will be omitted.
  • the period of interest setting section 5 performs a period of interest setting process
  • the sampling period determining section determines the sampling period
  • the response converting section 76 converts the frequency characteristics of the eye into an impulse response
  • the response function determining section 72 processes a response function.
  • Each process such as time determination, digital filter processing by the digital filter processing section 73, and flicker index derivation processing by the flicker derivation section 74, is carried out by a processor included in the optical measurement device 1. It may also be executed by operating according to an operating program stored in a recording medium.
  • ⁇ Effects of the second embodiment> The same effects as the first embodiment can be achieved.
  • the response function time is an integer multiple of the period of interest, at any time of the superimposed stimulus value data, the original data before digital filter processing (specifically, the response function time from the current time) The average luminance values during the period) will match. As a result, even if steep stimulus value data is input, offset can be avoided, and highly accurate flicker measurement is possible.
  • This invention can be used for measuring light from a display, etc.
  • Display light measuring device 2 Light collecting section 3 Optical path branching section 4 Stimulus value acquisition section 41a to 41c, 43 Optical sensor 42, 44 Output section 5 Period of interest setting section 51 Frequency detection section 6 Sampling period determining section 7 Flicker value deriving section 71 Response storage section 72 Response function determination section 73 Digital filter processing section 74 Flicker derivation section 75 Frequency characteristic storage section 76 Response conversion section 10 Optical measurement measurement system 11 Operation section 12 Display section 13 Personal computer 20 Measurement head 30 Data processing device

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Theoretical Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Eye Examination Apparatus (AREA)
PCT/JP2023/009570 2022-03-30 2023-03-13 ディスプレイ光計測装置及び光計測方法、データ処理装置並びにプログラム Ceased WO2023189479A1 (ja)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP2024511690A JPWO2023189479A1 (https=) 2022-03-30 2023-03-13
CN202380030218.9A CN118946788A (zh) 2022-03-30 2023-03-13 显示器光测量装置及光测量方法、数据处理装置和程序
KR1020247026606A KR20240134356A (ko) 2022-03-30 2023-03-13 디스플레이 광 계측 장치 및 광 계측 방법, 데이터 처리 장치 그리고 프로그램

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2022-055696 2022-03-30
JP2022055696 2022-03-30

Publications (1)

Publication Number Publication Date
WO2023189479A1 true WO2023189479A1 (ja) 2023-10-05

Family

ID=88200920

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2023/009570 Ceased WO2023189479A1 (ja) 2022-03-30 2023-03-13 ディスプレイ光計測装置及び光計測方法、データ処理装置並びにプログラム

Country Status (4)

Country Link
JP (1) JPWO2023189479A1 (https=)
KR (1) KR20240134356A (https=)
CN (1) CN118946788A (https=)
WO (1) WO2023189479A1 (https=)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2025173637A1 (ja) * 2024-02-15 2025-08-21 コニカミノルタ株式会社 光計測装置、色計測システム、色の評価方法及びプログラム

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002122513A (ja) * 2000-10-18 2002-04-26 Yokogawa Electric Corp 表示特性測定装置
JP2004317450A (ja) * 2003-04-21 2004-11-11 Hitachi Ltd 鉄道車両の照明のちらつきの測定方法
JP2010197597A (ja) * 2009-02-24 2010-09-09 Canon Inc 表示制御装置、及び表示制御方法
WO2021090689A1 (ja) * 2019-11-07 2021-05-14 コニカミノルタ株式会社 フリッカ計測装置及び計測方法
WO2021246125A1 (ja) * 2020-06-01 2021-12-09 コニカミノルタ株式会社 光波形計測装置及び計測方法
JP2023018536A (ja) * 2021-07-27 2023-02-08 コニカミノルタ株式会社 光計測装置、光計測方法、データ処理装置及びプログラム

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002122513A (ja) * 2000-10-18 2002-04-26 Yokogawa Electric Corp 表示特性測定装置
JP2004317450A (ja) * 2003-04-21 2004-11-11 Hitachi Ltd 鉄道車両の照明のちらつきの測定方法
JP2010197597A (ja) * 2009-02-24 2010-09-09 Canon Inc 表示制御装置、及び表示制御方法
WO2021090689A1 (ja) * 2019-11-07 2021-05-14 コニカミノルタ株式会社 フリッカ計測装置及び計測方法
WO2021246125A1 (ja) * 2020-06-01 2021-12-09 コニカミノルタ株式会社 光波形計測装置及び計測方法
JP2023018536A (ja) * 2021-07-27 2023-02-08 コニカミノルタ株式会社 光計測装置、光計測方法、データ処理装置及びプログラム

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2025173637A1 (ja) * 2024-02-15 2025-08-21 コニカミノルタ株式会社 光計測装置、色計測システム、色の評価方法及びプログラム

Also Published As

Publication number Publication date
CN118946788A (zh) 2024-11-12
JPWO2023189479A1 (https=) 2023-10-05
KR20240134356A (ko) 2024-09-09

Similar Documents

Publication Publication Date Title
JP6138203B2 (ja) 内視鏡装置
US6829496B2 (en) Blood component measurement apparatus
JP6525918B2 (ja) 内視鏡システム、画像処理装置、及び画像処理装置の作動方法
US20050030305A1 (en) Apparatuses and methods for utilizing non-ideal light sources
CN115684008B (zh) 光测量装置、光测量方法、数据处理装置以及程序
US20180289240A1 (en) Endoscope system, processor device, and method for operating endoscope system
US11116384B2 (en) Endoscope system capable of image alignment, processor device, and method for operating endoscope system
CN111935428A (zh) 一种hud图像亮度调节系统及实现方法
WO2023189479A1 (ja) ディスプレイ光計測装置及び光計測方法、データ処理装置並びにプログラム
JP2007208413A (ja) 色補正装置および色補正方法ならびに色補正プログラム
JP5586858B2 (ja) 表示制御装置、及び表示制御方法
US11763777B2 (en) Image display device, image display system, image display method, and computer program for providing a low-luminance grayscale standard display function (GSDF) display
JP2016054794A (ja) 内視鏡システム、プロセッサ装置、内視鏡システムの作動方法、及びプロセッサ装置の作動方法
KR20240118866A (ko) 디스플레이 광 계측 장치 및 광 계측 방법, 데이터 처리 장치 그리고 프로그램
US9996927B2 (en) Endoscope apparatus
CN117042677A (zh) 用于分析对象的方法和系统
KR20240113543A (ko) 광 계측 방법, 광 계측 장치, 데이터 처리 장치 및 프로그램
WO2025173637A1 (ja) 光計測装置、色計測システム、色の評価方法及びプログラム
US20230106227A1 (en) A method and assembly for determining a representation which indicates the activity of a locus coeruleus system of a user
CN107578381B (zh) 一种内窥光干涉断层成像颜色映射方法
JP5527990B2 (ja) 表示制御装置、及び、表示制御方法
EP3984449A1 (en) System and method for determining heart beat features
JP4225414B2 (ja) 画像色補正装置、方法、プログラム及び記録媒体
CN120526712A (zh) 一种基于环境光的显示屏自适应调色方法及系统
KR20110050306A (ko) 동영상 화질 측정 장치 및 방법

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 23779499

Country of ref document: EP

Kind code of ref document: A1

WWE Wipo information: entry into national phase

Ref document number: 2024511690

Country of ref document: JP

WWE Wipo information: entry into national phase

Ref document number: 202380030218.9

Country of ref document: CN

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 23779499

Country of ref document: EP

Kind code of ref document: A1