JP2004117243A - Color measuring method for display member and its device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To measure the color of each colored layer in a line in any process of manufacturing a liquid crystal color filter, e.g. <P>SOLUTION: During measuring the colors of a display member which has the colored layer of at least one or more color or its forming material attached to a transparent substrate where translucent pattern regions forming the colored layer of a RGB are arrayed at preset pitches lengthwise and crosswise, a light transmitted through the display member is received by a line spectroscopy for developing spectral characteristics along a lined view, xy chromaticity values constituting a one-dimensional chromaticity train is calculated in accordance with a spectral result obtained corresponding to the view of the spectroscopy, a two-dimensional histogram corresponding to xy chromaticity coordinates is created from the calculated xy chromaticity values, and the chromaticity values for the RGB for the display member are calculated from the maximum value for the histogram to be created. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a method and an apparatus for measuring a color of a display member, and more particularly to a method and an apparatus for measuring a color of a display member, which are suitably applied when performing in-line color measurement in a manufacturing process of a liquid crystal color filter.
[0002]
[Prior art]
Generally, in a liquid crystal display, a color filter having a function of coloring a liquid crystal display surface is used to realize color display. This color filter is formed by applying RGB colored layers made of a resin material colored with a dye or a pigment to light-transmitting fine pattern regions arranged according to a predetermined rule.
[0003]
An example of a method for manufacturing a liquid crystal color filter will be described with reference to the process chart of FIG. This color filter is manufactured by a so-called photolithography technique. First, (1) an elementary glass (transparent substrate) is prepared, and (2) a chromium film is deposited on the entire surface by sputtering. Next, (3) a resist is applied to the entire chromium film, and the resist is exposed with a predetermined mask pattern. Then, (4) the resist is developed to remove portions other than the exposed portion of the resist film, and (5) exposed. The etched chromium film is removed by etching, and (6) the remaining resist film is stripped to form a light-shielding black matrix M that forms a boundary between the light-transmitting pattern regions.
[0004]
Thereafter, (7) a photosensitive colorant of R (red) is applied on the entire surface so that the black matrix M is completely covered, and (8) after exposure using a mask pattern corresponding to the arrangement of the R colored layer. (9) An R colored layer is formed by performing development for removing the photosensitive colorant other than the exposed portion.
[0005]
Thereafter, the respective colored layers of G (green) and B (blue) are also subjected to the processes of the respective steps (7) to (9), whereby the respective colored layers of RGB are arrayed according to a predetermined rule. A liquid crystal color filter can be produced.
[0006]
Since the liquid crystal color filter manufactured as described above greatly affects the color characteristics of the display itself, it is important to measure the color (for example, xy chromaticity) and manage products. Conventionally, in color management of a liquid crystal color filter, color measurement has been performed using a microscope-type spectral device.
[0007]
[Problems to be solved by the invention]
However, when a color measurement is performed using a microscope-type spectrometer as described above, since a color measurement cannot be performed in-line during the production of a liquid crystal color filter, a photosensitive colorant is applied to each color. Inspection was performed after exposure and development.
[0008]
Therefore, if the chromaticity of the photosensitive colorant is out of the standard at the stage immediately after the application, there is a problem that the subsequent exposure and development work is wasted, and when performing the measurement, the target Since the object has to be brought to the spectrometer every time, there is a problem that the measuring operation requires labor.
[0009]
The present invention has been made to solve the above-mentioned conventional problems. For example, in the case of a liquid crystal color filter, in an arbitrary manufacturing process, the color of each of the attached colored layers of RGB or the material for forming the same is changed. An object of the present invention is to provide a method and an apparatus for measuring the color of a display member that can be measured in-line.
[0010]
[Means for Solving the Problems]
The present invention relates to a display member in which one or more color layers or a material for forming the color layers are adhered to a substrate on which pattern regions forming each color layer of RGB are arranged at predetermined pitches in vertical and horizontal directions. A method for measuring the color of a display member, wherein the light from the display member is received by a line-shaped spectroscope that obtains spectral characteristics along a line-shaped field of view, and is obtained in accordance with the spectroscope field of view. Calculating xy chromaticity values forming a one-dimensional chromaticity sequence based on the obtained spectral results, and measuring each of the RGB colors based on the calculated xy chromaticity values, It is a solution to the problem.
[0011]
The present invention also provides a display member in which one or more color layers or a material for forming the color layers are adhered to a substrate on which pattern regions forming each color layer of RGB are arranged at a predetermined pitch in each of vertical and horizontal directions. A color measuring device for a display member that measures the color of light received from the display member by a linear spectroscope that obtains spectral characteristics along a linear visual field, and corresponding to the spectroscope visual field. Based on the obtained spectral results, calculating means for calculating xy chromaticity values forming a one-dimensional chromaticity sequence and measuring each of the RGB colors based on the calculated xy chromaticity values, Similarly, the object has been achieved.
[0012]
That is, in the present invention, for example, each colored layer is sequentially formed on a transparent substrate in which light-transmitting pattern regions for forming each colored layer of RGB are arranged at a predetermined pitch in each of the vertical and horizontal directions. In the case of finally producing a liquid crystal color filter in which all colors are aligned, the transmitted light is received by the linear spectroscope for the display member at the stage where one or more colored layers or the material for forming the colored layer are applied. Calculating an xy chromaticity value forming a one-dimensional chromaticity sequence based on the spectral result obtained corresponding to the spectroscope field of view, and measuring each of the RGB colors based on the calculated xy chromaticity value Therefore, each color can be measured inline at an arbitrary stage of the manufacturing process.
[0013]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[0014]
FIG. 1 is a schematic side view including a block diagram showing a main part of a color measuring device for a display member according to a first embodiment of the present invention.
[0015]
The color measuring apparatus according to the present embodiment is a glass in which, in a manufacturing process of a liquid crystal color filter, light-transmitting pattern regions for forming each of RGB colored layers are arranged at predetermined pitches in vertical and horizontal directions. This is applied to the display member after the first color material is applied (deposited) on the substrate (transparent substrate). Here, the display member is a step of applying at least one color layer or a material (photosensitive colorant) for forming the color layer on the glass substrate on which the black matrix made of the chromium film is formed in the step (6) in FIG. (7) The state after that, including the liquid crystal color filter of the final product in addition to the intermediate member in the middle of the process.
[0016]
The color measuring device of the present embodiment is disposed along a transport line that transports a display member D based on a glass substrate in a transport direction indicated by a white arrow in the drawing, and is disposed above the transport line. An arithmetic unit (arithmetic means) including a linear spectroscope 10 and a computer that calculates a measurement result based on a spectral data sequence (spectral result) input from the spectroscope field of view of the linear spectroscope 10 via the lens 10A. 20, a display unit 24 for displaying calculated measurement results and the like, and a control unit 30 for controlling the operation and the like of the entire apparatus.
[0017]
In addition, in the color measuring device of the present embodiment, the transmission light source 40 is installed at a position facing the lens 10A of the linear spectroscope 10 on the lower side of the transport line, and the display member D to be transported is First, second, and third optical fiber photoelectric sensors (position sensors) 50, 52, and 54 for detecting the tip position are arranged at predetermined intervals in order from the upstream side. Detection signals are input from the photoelectric sensors 50, 52, and 54 to the control unit 30 via the sensor controllers 50A, 52A, and 54A, respectively.
[0018]
The control unit 30 outputs a command signal for moving a reference glass (reference transparent substrate) to a transporter 60 (hardware is not shown) at a later-described calibration stage, or outputs a signal to each of the photoelectric sensors 50 to 54. Based on the detection signal input from the controller 60, the display device D is positioned at a predetermined position, and a transport command signal for stopping the transport is output to the transporter 60. When a positioning completion command signal is input from the transfer device 60, a measurement start command signal is output to the arithmetic unit 20 to start the acquisition (measurement) of the spectral data sequence by the linear spectroscope 10. The single-axis moving mechanism 12 can control the movement of the spectroscope 10 in a direction orthogonal to the transport direction. In the control unit 30, information on the color measurement position for each product is preset, and information such as a glass size and a glass type constituting the target display member D is transmitted from the production management system 70 (details are omitted). When input, the calculation for determining the measurement position from the glass size is performed, and the calibration described later is performed based on the glass type.
[0019]
In the present embodiment, the visual field of the spectroscope of the linear spectroscope 10 is arranged obliquely with respect to the direction of arrangement of the pattern regions formed on the display member D, and the color of the formed colored layer and the like is changed. It is designed to measure. How to arrange the one-dimensional spectroscope visual field will be described with reference to FIG.
[0020]
FIG. 2 shows an image of the completed liquid crystal color filter, in which the frame portion corresponds to a light-shielding black matrix M, and the black matrix M is vertically separated and arranged at a constant pitch in the horizontal direction. The colored area corresponds to a translucent pattern area, and in each pattern area, colored layers corresponding to the respective colors are periodically arranged in this order as indicated by R, B, and G in the horizontal direction. And colored layers of the same color are arranged in the vertical direction.
[0021]
In the present embodiment, the one-dimensional spectroscopic field of view indicated by the thick straight line A is, as shown in the drawing, 3 × horizontal pitch to に 対 し て of the arrangement of the pattern regions corresponding to the R, B, and G colored layers. × The inclination of the vertical pitch, that is, (vertical pitch / horizontal pitch) = the inclination angle is set to + ／. The field of view A is arranged so as to extend in the horizontal direction over 6 (= 2 × 3) × horizontal pitch (two periods), in other words, the projection length on the horizontal axis is two periods or more. It has become so. However, FIG. 2 shows an example over three periods.
[0022]
As described above, by disposing the spectroscope visual field A obliquely with respect to the arrangement of the pattern regions, three cycles of G coloring located at the center of FIG. As can be seen by focusing on the layers, at the two Gs on both sides, despite the worst case where the spectroscope field of view A is over the black matrix M, the G in the middle is completely over the entire range. Can be measured. Therefore, according to the measuring device of the present embodiment, it is possible to reliably measure the color of at least one of all the RGB colored layers over the entire width in the horizontal direction by one measuring operation. Can be prevented from occurring.
[0023]
In the RGB color measurement by the linear spectroscope 10, in the arithmetic unit 20, for example, xy chromaticity values (chromaticity coordinates) defined by the JIS Z8722 equation (4) are arranged along the visual field of the spectroscope. It can be measured by calculation as a chromaticity sequence in units of pixels composed of image pickup devices such as CCDs. Therefore, from the chromaticity sequence thus obtained, values close to the chromaticity corresponding to each of the predetermined RGB colors are respectively extracted, and the average value and the mode value of the chromaticity extracted for each color are calculated. The measured chromaticity can be compared with a preset reference value to determine pass / fail. A specific method of color measurement will be described later in detail.
[0024]
Further, in the present embodiment, since the linear spectroscope 10 is used, in-line measurement can be performed in the manufacturing process of the liquid crystal color filter, so that color measurement can be easily performed in any process. As the linear spectroscope 10, for example, as disclosed in Japanese Patent Application Laid-Open No. Hei 6-34525, a one-dimensional image derived from a measurement area is spectrally separated by a diffraction grating and then formed on a two-dimensional photosensor. Then, a spectral photometric device that detects spectral intensity and analyzes one-dimensional spectral distribution based on the spectral intensity can be used. However, the present invention is not limited to this, and any device can be used as long as it can acquire spectral data (distribution) of a one-dimensional image to be captured over the entire range of the one-dimensional spectroscope visual field. In other words, the spectroscope is not limited as long as it has a line-shaped visual field and spectral characteristics can be obtained along the line, for example, at predetermined pitches.
[0025]
Next, the operation of the present embodiment will be described with reference to the flowchart of FIG.
[0026]
In the present embodiment, as shown by the crosses in the image of the measurement position on the display member D indicated by a rectangle in FIG. 4, the measurement is performed for a total of 9 measurement positions of 3 rows in the transport direction and 3 columns in the orthogonal direction to the transport direction. It shall be. Each position of the row and the column of the measurement position is obtained from information previously set in the control unit 30 according to the glass size used as described above. FIG. 5 is a perspective view showing an image at the time of measurement by the measuring device.
[0027]
First, the control unit 30 obtains the size of the display member D, that is, the size of the glass substrate used for manufacturing the liquid crystal color filter (step 1), and obtains one of the directions perpendicular to the transport direction shown in FIG. Calculate the measurement positions in the third to third columns (step 2). The measurement position in the transport direction is set as an installation interval of the first to third photoelectric sensors 50 to 54.
[0028]
Next, calibration is performed so that there is no variation due to a difference in measurement conditions at each measurement position (step 3). Step 3 will be described in detail below.
[0029]
FIG. 6 is a schematic perspective view for explaining the calibration. FIG. 6A shows an image at the time of measurement corresponding to FIG.
[0030]
As described above, in this embodiment, the transmitted light of the display member D is measured by the linear spectroscope 10 under the illumination of the transmission light source 40 disposed along the transport line. The transmission light source 40 is composed of an elongated line light source extending in a direction perpendicular to the transport direction, that is, in the width direction of the display member D to be transported. In many cases, the light source intensity varies depending on the light source, and the intensity changes over time.
[0031]
Further, since the transmitted light of the display member D is measured by the line-shaped spectroscope 10 as described above, the light transmission characteristics (spectral transmission) also depend on the type of glass substrate (transparent substrate) constituting the display member D. Rate), it is important to calibrate in advance so that errors due to glass do not occur. Here, as shown in the figure, four types of elementary glass (reference transparent substrates) A to D serving as references of the same material as the glass substrate are formed of empty areas on the transmission light source 40 at positions off the transport line. It can be installed in the calibrating unit 40A or retracted from the calibrating unit 40A. In the calibrating unit 40A, the elementary glasses A to D are installed in parallel with the transmission light source 40 so as to be at the same height as the display member at the time of measurement. The device 10 can automatically receive the transmitted light from the corresponding glass substrate.
[0032]
In the present embodiment, prior to the color measurement of the display member D, calibration is performed for variations in glass type and light source intensity according to the flowchart shown in FIG.
[0033]
First, when the type of the glass substrate (elementary glass) to be obtained is obtained from the production management system 70 (step 31), for the sake of convenience, as shown in FIG. To D) (Step 32), and at the same time, the reference glasses A to D set in the calibration unit 40A above the light source 40 are retracted from above the light source 40 (Step 33). Then, the reference light source spectral data for only the light source at the same position is acquired (step 34). Next, as shown in FIG. 4C, the reference glass that has been retracted in step 33 is moved to the upper part (calibration unit) of the transmission light source 40 (step 35), and the reference corresponding to the obtained glass type is set. With respect to glass (glass B in this example), reference glass spectral data is obtained by the linear spectroscope 10 (step 36).
[0034]
Thereafter, as shown in FIG. 4D, the linear spectroscope 10 is moved to the measurement position in the first column without the display member D (step 37), and the first light source spectral data in the first column is obtained. Is obtained (step 38), and the reference glass spectral data obtained in step 36 is corrected based on the ratio of the obtained first light source spectral data to the reference light source spectral data obtained in step 34 to obtain a first reference. Glass spectroscopic data is set (step 39).
[0035]
This correction will be specifically described. Now, it is assumed that the reference light source spectral data A acquired in the step 34 is a solid line (image) shown in FIG. The vertical axis in this figure corresponds to the spectral energy, and the horizontal axis corresponds to the wavelength.
[0036]
Also, it is assumed that the reference glass spectral data B acquired in step 36 is the solid line shown in FIG. 7B, and the first light source spectral data C acquired in step 38 is the solid line shown in FIG. .
[0037]
If the intensity of the light source in the first column and the calibration unit 40A are completely the same, the ratio (C ÷ A) of the two becomes 1 over the entire wavelength range. When the spectral data A is shifted as indicated by the dashed line, the ratio (C） A) between the two does not become completely 1 as shown by the solid line in FIG.
[0038]
Therefore, in order to eliminate the influence of the difference in light source intensity, the reference glass spectral data B obtained by the calibrating unit 40A is corrected by the above ratio in step 39, and the first reference glass used in the first column is used. It is spectral data. Although illustration of the first reference spectral data after this correction is omitted, it is equivalent to executing the calculation of B × C ÷ A.
[0039]
After the processing on the first column is completed as described above, the linear spectroscope 10 is moved to the measurement position on the second column (Step 40), and the reference glass spectral data at the measurement position is obtained by the same method. The correction is made to the second reference glass spectral data (steps 41 and 42), and the measurement position in the third column is similarly corrected to the third reference glass spectral data (steps 43 to 45).
[0040]
After the calibration in Step 3 described above is completed, the transport of the display member D (measurement glass) is started (Step 4). When a signal is input from the first photoelectric sensor 50 (Step 5), the display is started. The conveyance of the member D (glass) is stopped (Step 6), the linear spectroscope 10 is moved to the measurement position in the first row (Step 7), and the spectroscope 10 irradiates with the transmission light source 40. First spectral transmittance is obtained (step 8).
[0041]
If the first spectral transmittance is described using an R filter as an example, assuming that the measurement point spectral data D actually obtained at the measurement position in the first column is a solid line shown in FIG. Is obtained under the light source from which the first light source data C is obtained. Therefore, D ÷ (C ÷ A) is corrected to a solid line E as shown in FIG. By dividing by data (E ÷ B), it is possible to finally obtain the first spectral transmittance F indicated by the solid line in FIG. That is, in step 8, the calculation of F = D し (B × C ÷ A) is performed using the calibration result in step 39 to obtain the first spectral transmittance.
[0042]
Thereafter, the linear spectroscope 10 is moved to the measurement position in the second column by the moving mechanism 12, and the second spectral transmittance is similarly obtained (steps 9 and 10). Move to obtain the third spectral transmittance similarly (steps 11 and 12). After the processing of the first row is completed as described above, the respective operations from step 4 to step 12 are similarly performed for each measurement position in the transport direction of the second and third rows, and After acquiring the first to third spectral transmittances, the xy chromaticities of all nine measurement positions are calculated (steps 13 and 14).
[0043]
The calculation of the chromaticity at all the measurement positions in step 14 will be described in detail. For example, the first spectral transmittance obtained in step 8 is used for the measurement positions in the first row and first column, as shown in FIG. The xy chromaticity value (chromaticity xy in the figure) is calculated according to the flowchart.
[0044]
That is, in the calculation unit 20, a one-dimensional measurement is performed for the measurement position in the first row and the first column from the first spectral transmittance F based on the color, which is a spectral result acquired from the entire region of the spectroscope field A. The xy chromaticity values forming the chromaticity sequence are calculated (step 131). This is based on the spectral results (intensity) detected by the pixels arranged in the direction perpendicular to the visual field direction in units of pixels arranged in the visual field direction, which constitute the light receiving portion of the linear spectroscope 10. It can be calculated in accordance with the above-mentioned JIS based on the measured spectral transmittance.
[0045]
After the xy chromaticity values are calculated for all the pixels over the entire length of the chromaticity column, the two-dimensional coordinates (xy chromaticity diagram) of the chromaticity xy as shown in FIG. ) Is calculated (step 132). In the two-dimensional coordinates, a predetermined determination range centering on a reference chromaticity value determined for each of the RGB colors is set in advance, and the maximum value within each determination range is calculated for the calculated histogram. Then, the calculated maximum value is set as a maximum value generated in the histogram, and each xy chromaticity value corresponding to the maximum value is set as a measurement value of each of RGB colors (step 134).
[0046]
FIG. 12A shows the relationship between the spectroscope visual field A and the display member (color filter) D color filter when color measurement is performed at the stage when each of the RGB color layers is formed. ) Shows a chromaticity column corresponding to the spectroscope visual field A, and an array image of chromaticity values (x1, y1), (x2, y2) and the like in pixel units constituting the chromaticity column. ) Shows an image of a histogram of xy chromaticity values represented by a cumulative frequency (appearance frequency) in pixel units. However, FIG. 2A is the same as FIG. 2 described above, and the same color layer is arranged in the vertical direction. It represents.
[0047]
In FIG. 12 (C), the judgment ranges circled for each color are set as indicated by the symbols of RGB, and a clear peak (maximum value) for each color of RGB is set in each range. ) Indicates that a histogram is obtained. In this histogram, small peaks other than RGB represent black by the black matrix.
[0048]
After the chromaticity calculation of all the measurement positions in step 14 described above is completed, it is determined whether or not the chromaticity deviation is within a preset reference for the measurement result based on the calculated xy chromaticity values (step 14). 15) The pass / fail result is displayed on the display unit 24 (steps 16 and 17), and the operation from step 1 is started for the next sample.
[0049]
As described above, according to the present embodiment, the color of the liquid crystal color filter whose image is shown in FIG. 2 can be measured in-line, and R, G, All colors of B can be measured reliably.
[0050]
Further, since the color measuring apparatus of the present embodiment can perform in-line measurement, as shown in the flowchart of FIG. Immediately after application, an R color measurement step is performed, and R color measurement can be performed in the same manner as shown in the flowchart of FIG. By measuring a single color in this way, if a defective product has occurred at this stage, it is possible to eliminate the waste of performing each of the subsequent exposure and development steps.
[0051]
This means that in the next G filter formation and B filter formation as well, as shown in the G color measurement step and the B color measurement step, color measurement is performed immediately after coating, thereby similarly eliminating waste for each color. Can be.
[0052]
FIG. 14 corresponds to FIG. 12 in which the color measurement is performed at the stage where the photosensitive G colorant is applied over the entire surface after the formation of the R color layer. In FIG. 14C, it can be seen that a large histogram of G is obtained because G is applied on the entire surface except for R.
[0053]
When measuring each color immediately after the application of the photosensitive colorant as described above, in order to prevent the photosensitive colorant from being exposed to the measurement light from the transmission light source 40, for example, a short wavelength component of 420 nm or less is used. It is effective to insert a filter for cutting between the light source 40 and the display member D.
[0054]
FIG. 15 is a schematic perspective view corresponding to FIG. 5 showing a main part of a color measuring device according to a second embodiment of the present invention.
[0055]
The color measuring device according to the first embodiment is the same as the color measuring device according to the first embodiment except that three linear spectroscopes 10 are arranged corresponding to respective measurement positions in a direction orthogonal to the transport direction of the display member D. Is substantially the same as
[0056]
Therefore, in the first embodiment, it is necessary to sequentially measure the measurement positions in the first to third columns, but according to the present embodiment, the operation can be performed only once.
[0057]
In the present embodiment, since it is not necessary to move the linear spectroscope 10 in the width direction of the display member D, the tip of the display member D has passed through the first to third photoelectric sensors 50 to 54, respectively. There is also an advantage that measurement can be performed without stopping at timing.
[0058]
As described above, the present invention has been specifically described. However, the present invention is not limited to the above-described embodiment, and can be variously modified without departing from the gist thereof.
[0059]
For example, in the above-described embodiment, the case where the xy chromaticity value is calculated for each chromaticity sequence obtained from each measurement position has been described, but the xy chromaticity value is calculated in units of a plurality of chromaticity sequences obtained from different measurement positions. You may make it calculate.
[0060]
Further, the field of view of the spectroscope of the linear spectroscope 10 does not necessarily have to be inclined. Even if it is made oblique, it is not limited to the case of inclining to + ／, but it may be arranged to be −−１. In addition, as shown in FIG. 16 corresponding to FIG. The spectroscopes 10 may be prepared and arranged at ± 1/6 each.
[0061]
In each of the first and second embodiments, the case where the sample (display member) D is moved in the transport direction and the position is measured by the three photoelectric sensors, and the measurement is performed, is not limited thereto. The position may be determined by two photoelectric sensors, and the measurement may be performed by moving the linear spectroscope 10 in the transport direction.
[0062]
Further, it goes without saying that the measurement position for performing the color measurement is not limited to 3 rows × 3 columns as described in the above embodiment.
[0063]
The color measurement is not limited to the xy chromaticity value, but may be a color measurement using a color system such as a Lab color system or a CMY color system derived from the XYZ color system corresponding to the xy chromaticity coordinates.
[0064]
Although the case where the tip of the display member is detected by the photoelectric sensor has been described, a measurement point for positioning formed in a predetermined position in advance may be measured.
[0065]
Further, in the above-described embodiment, the case where the display member is a liquid crystal color filter or an intermediate member in the middle of the product has been described. However, the present invention is not limited to this. (Plasma Display Panel).
[0066]
【The invention's effect】
As described above, according to the present invention, in the case of, for example, a liquid crystal color filter, the color of each of the attached RGB colored layers and the material for forming the same can be measured inline in an arbitrary manufacturing process.
[Brief description of the drawings]
FIG. 1 is a schematic side view including a block diagram showing a main part of a color measuring device according to a first embodiment of the present invention. FIG. 2 is a characteristic of a positional relationship between a liquid crystal color filter and a spectroscope field of view of a linear spectroscope. FIG. 3 is a flowchart showing the operation of the embodiment. FIG. 4 is an explanatory diagram showing an image of a measurement position in a liquid crystal color filter. FIG. 5 is an image at the time of color measurement by a linear spectroscope in the first embodiment. FIG. 6 is a schematic perspective view for explaining an operation at the time of calibration. FIG. 7 is a flowchart showing a calibration processing procedure. FIG. 8 is an image of data acquired at the time of the calibration processing. FIG. 9 is a diagram showing a relationship between data acquired at the time of a calibration process and a spectral transmittance and the like. FIG. 10 is a diagram showing a processing procedure of xy chromaticity value calculation. Flowchart FIG. 11 is a diagram showing a relationship between each reference chromaticity of RGB and a maximum value judgment range. FIG. 12 is an explanatory diagram showing an image of color measurement of three layers of RGB. FIG. FIG. 14 is a flow chart showing characteristics of the case. FIG. 14 is an explanatory view showing an image of color measurement immediately after application of the G layer after formation of the R layer. FIG. 15 is a schematic view showing an image of color measurement by the linear spectroscope in the second embodiment. FIG. 16 is an explanatory view showing a modification of the positional relationship of the spectroscope field of view of the linear spectroscope with respect to the liquid crystal color filter. FIG. 17 is a process chart showing features of the manufacturing process of the liquid crystal color filter.
A: Spectroscope field of view D: Display member M: Black matrix 10: Linear spectroscope 40: Transmission light sources 50, 52, 54 ... Photoelectric sensor

Claims (13)

A display for measuring a color of a display member on which one or more color layers or a material for forming the color layers is applied to a substrate in which pattern regions forming each color layer of RGB are arranged at a predetermined pitch in each of vertical and horizontal directions. A method for measuring the color of a member,
A linear spectroscope that obtains spectral characteristics along a line-shaped visual field receives light from the display member, and based on a spectral result obtained corresponding to the spectroscope visual field, a one-dimensional chromaticity sequence A color measuring method for a display member, comprising: calculating an xy chromaticity value that configures the above; and measuring each of the RGB colors based on the calculated xy chromaticity value. A two-dimensional histogram corresponding to the xy chromaticity coordinates is created from the obtained xy chromaticity values, and each of the RGB chromaticity values for the display member is calculated from the local maximum value generated in the histogram. The method for measuring a color of a display member according to claim 1, wherein The method according to claim 2, wherein the maximum value in the histogram is a maximum value within a predetermined determination range centered on a reference chromaticity value preset for each of RGB. 2. The color measuring method for a display member according to claim 1, wherein the xy chromaticity values are calculated for a plurality of chromaticity sequences obtained by shifting a measurement position by one linear spectroscope. The method according to claim 1, wherein the xy chromaticity values are calculated for a plurality of chromaticity sequences acquired from different measurement positions by a plurality of linear spectrometers. The said display member is a color filter for liquid crystal displays which is a coloring layer in which each color layer of RGB is formed in the translucent pattern area | region, or the intermediate member in the middle of the manufacturing process of Claim 1 characterized by the above-mentioned. Color measuring method for display members. A display for measuring the color of a display member on which one or more color layers or a material for forming the color layers is applied to a substrate on which pattern regions forming each color layer of RGB are arranged at predetermined pitches in vertical and horizontal directions. A color measuring device for a member,
Light from the display member is received by a linear spectroscope whose spectral characteristics are obtained along a linear visual field, and a one-dimensional chromaticity sequence is formed based on a spectral result obtained corresponding to the spectroscope visual field. A color measuring device for a display member, comprising calculating means for calculating xy chromaticity values to be constituted and measuring each of the RGB colors based on the calculated xy chromaticity values. A two-dimensional histogram corresponding to xy chromaticity coordinates is created from the obtained xy chromaticity values, and each of the RGB chromaticity values for the display member is calculated from the local maximum value generated in the histogram. The color measuring device for a display member according to claim 7, wherein 9. The color measuring device according to claim 8, wherein the local maximum value in the histogram is a maximum value within a predetermined determination range centered on a reference chromaticity value preset for each of RGB. The color measuring device for a display member according to claim 7, wherein the xy chromaticity values are calculated for a plurality of chromaticity sequences obtained by shifting a measurement position by one linear spectroscope. The color measuring device for a display member according to claim 7, wherein the xy chromaticity values are calculated for a plurality of chromaticity sequences acquired from different measurement positions by a plurality of linear spectrometers. The line-shaped spectroscope is disposed along a transport line of a display member,
At a predetermined position on the transfer line, a position sensor for detecting the position of the display member to be transferred is installed,
The color measuring device for a display member according to claim 7, wherein light reception by the linear spectroscope is performed based on a detection signal output from the position sensor. The said display member is a color filter for liquid crystal displays which is a coloring layer in which each color layer of RGB is formed in a translucent pattern area, or an intermediate member in the middle of the manufacturing process, The said display member is characterized by the above-mentioned. Color measuring device for display members.

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