CN110514304B - Area array chromaticity measuring device and method - Google Patents
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- 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
- G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
- G01J3/02—Details
- G01J3/0205—Optical elements not provided otherwise, e.g. optical manifolds, diffusers, windows
- G01J3/0208—Optical elements not provided otherwise, e.g. optical manifolds, diffusers, windows using focussing or collimating elements, e.g. lenses or mirrors; performing aberration correction
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- 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
- G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
- G01J3/46—Measurement of colour; Colour measuring devices, e.g. colorimeters
- G01J3/50—Measurement of colour; Colour measuring devices, e.g. colorimeters using electric radiation detectors
- G01J3/506—Measurement of colour; Colour measuring devices, e.g. colorimeters using electric radiation detectors measuring the colour produced by screens, monitors, displays or CRTs
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Abstract
The invention belongs to the technical field of semiconductors and display, and discloses an area array chromaticity measuring device and method, wherein the device comprises a spectrometer, a coupler and a plurality of measuring units, the spectrometer is connected with the coupler, and the coupler is connected with N measuring units; the method comprises the steps of sequentially obtaining center point spectrum information of N samples to be detected, and obtaining the center point spectrum information of the current Kth sample to be detected and simultaneously obtaining image information of other M samples to be detected; acquiring the image information of the N samples to be detected before acquiring the center point spectrum information of the N samples to be detected, or acquiring the center point spectrum information of the N samples to be detected and the image information of the N samples to be detected simultaneously; and obtaining the central point chromaticity information of the sample to be detected according to the central point spectrum information of the sample to be detected. The invention solves the problems of complex equipment, large equipment volume and higher detection cost of area array chromaticity measurement in the prior art, can simplify the detection equipment and reduce the detection cost.
Description
Technical Field
The invention relates to the technical field of semiconductors and display, in particular to an area array chromaticity measuring device and method.
Background
Radiation of light of different wavelengths in the visible spectral range causes different color perception of a person. For example, about 630nm is red, about 535nm is green, and about 430nm is blue. In the physical world, light emitted by an object is not only characterized in intensity, but also standardized in color. This is especially true in the display panel industry, where the light emitted from the display screen is directed into the human eye. How to correctly display the color and measure the accuracy of the color light emitted by the display panel is very important in the whole industry.
The instrument for obtaining the tristimulus values and chromaticity coordinates of the object color by measuring the spectral luminosity of the object in the display panel industry is called a color measurement spectrophotometer. In general, a colorimetric spectrophotometer can only measure the brightness of a single point on a screen. If the chromaticity coordinates of the entire face need to be measured, an area-array camera measurement is generally required. The existing area array chromaticity measuring equipment has the following problems: (1) the spectrometer and the area-array camera exist in one camera, and the equipment is large in size. (2) Each area-array camera is provided with a spectrometer, so that the equipment cost is high. In addition, in an actual production line, multi-station detection is generally adopted to improve detection efficiency and performance, so that equipment combining a table array camera and a spectrometer needs to be erected on each station, and the whole detection equipment is complex and has high detection cost.
Disclosure of Invention
The embodiment of the application provides a device and a method for measuring the area array chromaticity, and solves the problems that in the prior art, equipment for measuring the area array chromaticity is complex, equipment is large in size and detection cost is high.
The embodiment of the application provides an area array chromaticity measuring device, includes: the spectrometer comprises a spectrometer, a coupler and a plurality of measuring units;
the spectrometer is connected with the coupler, and the coupler is connected with the N measuring units;
each measuring unit is used for acquiring the center point spectral information and the image information of the corresponding sample to be detected in a time-sharing manner; acquiring the image information of the N samples to be detected before acquiring the center point spectrum information of the N samples to be detected, or acquiring the center point spectrum information of the N samples to be detected and the image information of the N samples to be detected simultaneously;
the spectrometer is used for obtaining the central point chromaticity information of the sample to be detected according to the central point spectrum information of the sample to be detected.
Preferably, each measuring unit comprises a spectrum acquisition assembly, the spectrum acquisition assembly is used for acquiring the center point spectrum information of the sample to be detected, and the coupler is connected with each measuring unit through the spectrum acquisition assembly.
Preferably, each measuring unit further comprises a camera photosensitive chip, a lens and a reflecting prism; the camera photosensitive chip and the reflecting prism are positioned on the first side of the lens, and the sample to be detected is positioned on the second side of the lens; when the reflecting prism moves into the measuring light path, light rays are reflected by the reflecting prism and then enter the spectrum acquisition assembly; and when the reflecting prism moves out of the measuring light path, light rays are incident to the camera photosensitive chip.
Preferably, the spectrum acquisition assembly comprises: a fiber pigtail and a condenser lens;
the condenser lens is connected with the optical fiber pigtail, and the optical fiber pigtail is connected with the coupler; the reflecting prism is aligned with the central axis of the condenser lens;
when the reflecting prism moves into the measuring light path, light rays are reflected by the reflecting prism and then enter the condensing lens.
Preferably, each of the measurement units further includes: a reflective prism adjustment assembly;
the reflection prism is arranged on the reflection prism adjusting assembly, and the reflection prism adjusting assembly is used for controlling the reflection prism to move in or out of the measuring light path.
Preferably, the area array chromaticity measuring apparatus further includes: a chromaticity conversion unit;
the chromaticity conversion unit is used for obtaining conversion information from image data to chromaticity coordinate data according to the central point chromaticity information of the sample to be detected and the image information of the sample to be detected, and obtaining non-central point chromaticity information of the sample to be detected according to the conversion information.
On the other hand, the embodiment of the application provides an area array chromaticity measuring method, which sequentially obtains center point spectrum information of N samples to be detected, and obtains center point spectrum information of the current Kth sample to be detected (K is more than or equal to 1 and less than or equal to N), and simultaneously obtains image information of other M samples to be detected (M is more than or equal to 0 and less than or equal to N-1); acquiring the image information of the N samples to be detected before acquiring the center point spectrum information of the N samples to be detected, or acquiring the center point spectrum information of the N samples to be detected and the image information of the N samples to be detected simultaneously; and obtaining the central point chromaticity information of the sample to be detected according to the central point spectrum information of the sample to be detected.
Preferably, the area array chromaticity measurement method further includes: and obtaining conversion information from the image data to chromaticity coordinate data according to the central point chromaticity information of the sample to be detected and the image information of the sample to be detected, and obtaining non-central point chromaticity information of the sample to be detected according to the conversion information.
Preferably, the time-sharing obtaining of the central point spectrum information and the image information of the plurality of samples to be detected specifically includes:
each sample to be detected corresponds to one measuring unit, the measuring units are respectively connected with a coupler, and the coupler is connected with a spectrometer;
setting a reflection prism in each measuring unit, and moving the reflection prism of one measuring unit into a measuring light path to obtain the center point spectrum information of the sample to be detected; the method comprises the steps that image information of a sample to be detected is obtained by moving a reflecting prism of a measuring unit out of a measuring light path; and controlling the reflecting prisms of the plurality of measuring units to move in or out of the measuring light path in a time-sharing manner, so that the spectrum information and the image information of the central points of the plurality of samples to be detected can be acquired in a time-sharing manner.
One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:
in the embodiment of the application, center point spectrum information of N samples to be detected is sequentially obtained, and image information of other M (M is more than or equal to 0 and less than or equal to N-1) samples to be detected is obtained while the center point spectrum information of the current Kth (K is more than or equal to 1 and less than or equal to N) sample to be detected is obtained; obtaining the image information of the N samples to be detected before obtaining the center point spectrum information of the N samples to be detected, or obtaining the center point spectrum information of the N samples to be detected and the image information of the N samples to be detected simultaneously, and obtaining the center point chromaticity information of the samples to be detected according to the center point spectrum information of the samples to be detected. The invention adopts multi-round spectral measurement operation, each round collects the center point spectral information of a sample to be detected, and multi-round successively collects the image information of the sample to be detected, and after the multi-round spectral measurement operation is completed, the center point spectral information of all the samples to be detected and the image information of all the samples to be detected are obtained. The invention adopts the all-in-one coupler, realizes the time-sharing collection of the image information (namely color camera data) of the sample to be detected and the central point spectrum information (namely central point spectrum data) of the sample to be detected by controlling the plurality of measuring units, can simplify the detection equipment and reduce the detection cost by the all-in-one shunt measurement, and is more suitable for field detection.
Drawings
In order to more clearly illustrate the technical solution in the present embodiment, the drawings needed to be used in the description of the embodiment will be briefly introduced below, and it is obvious that the drawings in the following description are one embodiment of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an area array chromaticity measurement apparatus provided in embodiment 2 of the present invention.
The system comprises a 1-condensing lens, a 2-reflecting prism, a 3-lens, a 4-camera photosensitive chip, a 5-sample to be detected and a 6-coupler.
Detailed Description
In order to better understand the technical solution, the technical solution will be described in detail with reference to the drawings and the specific embodiments.
Example 1:
embodiment 1 provides an area array chromaticity measurement apparatus including: the spectrometer comprises a spectrometer, a coupler and a plurality of measuring units; the spectrometer is connected with the coupler, and the coupler is connected with the N measuring units.
Each measuring unit is used for acquiring the center point spectral information and the image information of the corresponding sample to be detected in a time-sharing manner; acquiring the image information of the N samples to be detected before acquiring the center point spectrum information of the N samples to be detected, or acquiring the center point spectrum information of the N samples to be detected and the image information of the N samples to be detected simultaneously; the spectrometer is used for obtaining the central point chromaticity information of the sample to be detected according to the central point spectrum information of the sample to be detected.
On the basis of embodiment 1, a specific area array chromaticity measuring apparatus is provided as embodiment 2.
Example 2:
embodiment 2 provides an area array chromaticity measurement apparatus, including: the spectrometer, coupler, a plurality of measuring unit.
Each measuring unit comprises a camera photosensitive chip, a lens, a reflecting prism and a spectrum collecting assembly. The camera photosensitive chip and the reflecting prism are positioned on the first side of the lens, and the sample to be detected is positioned on the second side of the lens. When the reflecting prism moves into the measuring light path, light rays are reflected by the reflecting prism and then enter the spectrum acquisition assembly; and when the reflecting prism moves out of the measuring light path, light rays are incident to the camera photosensitive chip.
The spectrometer is connected with the coupler, and the coupler is connected with each measuring unit through the spectrum acquisition assembly.
The spectrum acquisition assembly is used for acquiring the center point spectrum information of the sample to be detected; the camera photosensitive chip is used for obtaining image information of a sample to be detected; the spectrometer is used for obtaining the central point chromaticity information of the sample to be detected according to the central point spectrum information of the sample to be detected.
In a specific aspect, the spectrum acquisition assembly includes: fiber pigtail, condenser lens. The condenser lens is connected with the optical fiber pigtail, and the optical fiber pigtail is connected with the coupler; the reflecting prism is aligned with a central axis of the condenser lens. When the reflecting prism moves into the measuring light path, light rays are reflected by the reflecting prism and then enter the condensing lens.
In a preferred embodiment, each of the measuring units further includes: a reflective prism adjustment assembly. The reflection prism is arranged on the reflection prism adjusting assembly, and the reflection prism adjusting assembly is used for controlling the reflection prism to move in or out of the measuring light path.
The area array chromaticity measuring device can also be provided with: and a chrominance conversion unit. The chromaticity conversion unit is used for obtaining conversion information from image data to chromaticity coordinate data according to the central point chromaticity information of the sample to be detected and the image information of the sample to be detected, and obtaining non-central point chromaticity information of the sample to be detected according to the conversion information.
In order to more clearly understand the area array chromaticity measuring apparatus provided by the present invention, an apparatus including two measuring units is taken as an example and is described with reference to fig. 1.
As shown in fig. 1, the measuring device includes two measuring units, which are respectively referred to as a first measuring unit and a second measuring unit. Two measuring unit's structure is the same, all mainly includes camera sensitization chip 4, camera lens 3, reflection prism 2, spectrum collection subassembly, the spectrum collection subassembly includes: a fiber pigtail and a condensing lens 1.
Each of which is located above one of the samples 5 to be tested. The coupler 6 is respectively connected with the optical fiber pigtail of the first measuring unit and the optical fiber pigtail of the second measuring unit. The first measuring unit is used for measuring a first sample to be detected, and the second measuring unit is used for measuring a second sample to be detected.
Example 3:
embodiment 3 provides an area array chromaticity measurement method, including the following two parts:
(1) and acquiring the central point spectrum information and the image information of a plurality of samples to be detected in a time-sharing manner.
The method specifically comprises the steps of sequentially obtaining center point spectrum information of N samples to be detected, and obtaining image information of other M (M is more than or equal to 0 and less than or equal to N-1) samples to be detected while obtaining center point spectrum information of the current Kth (K is more than or equal to 1 and less than or equal to N) sample to be detected; acquiring the image information of the N samples to be detected before acquiring the center point spectrum information of the N samples to be detected, or acquiring the center point spectrum information of the N samples to be detected and the image information of the N samples to be detected simultaneously.
The specific implementation mode is as follows: each sample to be detected corresponds to one measuring unit, the measuring units are respectively connected with a coupler, and the coupler is connected with a spectrometer; setting a reflection prism in each measuring unit, and moving the reflection prism of one measuring unit into a measuring light path to obtain the center point spectrum information of the sample to be detected; the method comprises the steps that image information of a sample to be detected is obtained by moving a reflecting prism of a measuring unit out of a measuring light path; and controlling the reflecting prisms of the plurality of measuring units to move in or out of the measuring light path in a time-sharing manner, so that the spectrum information and the image information of the central points of the plurality of samples to be detected can be acquired in a time-sharing manner.
The method can be understood as comprising n rounds of spectral measurement operations, wherein each round of spectral measurement operation collects the central point spectral information of a sample to be detected, a plurality of rounds of sequential collection of image information of the sample to be detected are carried out, and after the n rounds of spectral measurement operations are completed, the central point spectral information and the image information of the sample to be detected corresponding to the n measurement units are obtained.
It should be noted that the image information of each sample to be detected is acquired once; it is not necessary to acquire image information of the sample to be measured in each round of the spectral measurement operation. According to the practical application scene, different acquisition modes of the image information of the sample to be detected can be set. That is, in a certain round of spectral measurement operation, only one measurement unit collects the center point spectral data of one sample to be detected (for example, a display screen), and other multiple measurement units can collect the color camera data of one or more display screens, or do not collect the color camera data, and the color camera data only needs to be collected before the center point spectral data of all samples to be detected (for example, display screens) are collected.
(2) And obtaining the central point chromaticity information of the sample to be detected according to the central point spectrum information of the sample to be detected.
The invention will be further explained below by taking the example of two or four measuring units.
(1) Taking the example of including two measurement units, in order to obtain the center point spectrum information of all samples to be detected (for example, panels) and the image information of all samples to be detected, the following method can be adopted, and can be understood with reference to fig. 1:
a. when the two panels to be subjected to color chromaticity detection move below the two measuring units, the reflecting prism in the left measuring unit does not move into the measuring light path (namely the reflecting prism does not pop up), and light rays directly enter the surface of the camera photosensitive chip. At the moment, the reflecting prism in the right measuring unit pops up and moves into the measuring light path, and the light is directly reflected to the condensing lens to collect the spectral energy of the central light.
b. The light in the left measuring unit is not reflected, and the left measuring unit carries out image acquisition to obtain the whole screen shooting data. The light in the right measuring unit is transmitted to the spectral light splitting instrument through optical fiber data.
c. Then the reflection prism in the left measurement unit pops up, and the reflection prism in the right measurement unit shrinks. At this time, the central light of the left measurement cell is reflected into the condenser lens and collected by the spectrometer. The camera light sensing chip in the right measurement unit receives all the light energy.
Through the steps, the spectrum information of the central point of the screen under the left and right measuring units and the color camera data of the whole surface are collected.
(2) Taking four measurement units (the samples to be detected corresponding to the four measurement units are marked as an a screen, a B screen, a C screen and a D screen) as an example, in order to obtain the center point spectrum information of all the samples to be detected and the image information of all the samples to be detected, the following method can be adopted:
the first round is to collect the center point spectrum information of the A screen and collect the image information of the B screen, the C screen and the D screen;
the second round is used for collecting the center point spectrum information of the screen B and collecting the image information of the screen A;
the third round is used for collecting the spectrum information of the center point of the C screen;
and fourthly, collecting the spectrum information of the central point of the D screen.
The following may also be used:
the first round is to collect the center point spectrum information of the A screen and collect the image information of the B screen;
the second round is used for collecting the center point spectrum information of the screen B and collecting the image information of the screen C;
the third round is used for collecting the spectrum information of the central point of the C screen and collecting the image information of the D screen;
and fourthly, acquiring the spectrum information of the central point of the D screen and acquiring the image information of the A screen.
The collection mode is not limited to the above, and can be adjusted according to the needs. After n rounds of spectral measurement operations are ensured to be completed, the central point spectral information of the sample to be detected corresponding to n measuring units respectively and the image information of the sample to be detected corresponding to n measuring units respectively are obtained.
Example 4:
example 4 a part was added on the basis of example 3:
(3) and obtaining conversion information from the image data to chromaticity coordinate data according to the central point chromaticity information of the sample to be detected and the image information of the sample to be detected, and obtaining non-central point chromaticity information of the sample to be detected according to the conversion information.
The chromaticity data of the central point of the sample to be detected is directly calculated by a spectrometer, and the measurement results of the other points can also be calculated by calibrating with the data of the central point. That is, the conversion relationship from the spectrum to the RGB components of the color camera can be obtained according to the information of the central point of the measured spectrum and the RGB components obtained by the color camera. And then, the spectral information of the edge points can be obtained through the RGB conversion relation of the edge points measured by the camera. After the spectrum information is obtained, integrating with a standard chromaticity tristimulus value curve to obtain chromaticity information.
In summary, the invention provides a device and a method for realizing area array chromaticity measurement of an all-in-one shunt, which mainly realize time-sharing collection of color camera data and center point spectrum data by controlling a plurality of measurement units and an all-in-one coupler. And obtaining the conversion from the color camera data to the chromaticity coordinate data by comparing the central point with the data of the spectrograph. And obtaining the chromaticity coordinate data of the non-central point by calibrating the non-central point and the central point. The invention can simplify the detection equipment and reduce the detection cost by the all-in-one shunt measurement, and is more suitable for field detection.
Finally, it should be noted that the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to examples, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the claims of the present invention.
Claims (9)
1. An area array chromaticity measurement apparatus, comprising: the device comprises a spectrometer, a coupler and N measuring units;
the spectrometer is connected with the coupler, and the coupler is connected with the N measuring units;
each measuring unit is used for acquiring the center point spectral information and the image information of the corresponding sample to be detected in a time-sharing manner; acquiring the image information of the N samples to be detected before acquiring the center point spectrum information of the N samples to be detected, or acquiring the center point spectrum information of the N samples to be detected and the image information of the N samples to be detected simultaneously;
the spectrometer is used for obtaining the central point chromaticity information of the sample to be detected according to the central point spectrum information of the sample to be detected.
2. The area array colorimetric measurement device according to claim 1, wherein each of the measurement units includes a spectrum collection unit for obtaining center point spectrum information of a sample to be detected, and the coupler is connected to each of the measurement units through the spectrum collection unit.
3. The area-array colorimetric measurement device according to claim 2, wherein each of the measurement units further comprises a camera light-sensing chip, a lens, a reflection prism; the camera photosensitive chip and the reflecting prism are positioned on the first side of the lens, and the sample to be detected is positioned on the second side of the lens; when the reflecting prism moves into the measuring light path, light rays are reflected by the reflecting prism and then enter the spectrum acquisition assembly; and when the reflecting prism moves out of the measuring light path, light rays are incident to the camera photosensitive chip.
4. The area array colorimetric measurement device of claim 3, wherein the spectrum collection unit comprises: a fiber pigtail and a condenser lens;
the condenser lens is connected with the optical fiber pigtail, and the optical fiber pigtail is connected with the coupler; the reflecting prism is aligned with the central axis of the condenser lens;
when the reflecting prism moves into the measuring light path, light rays are reflected by the reflecting prism and then enter the condensing lens.
5. The area array chromaticity measurement apparatus according to claim 3, wherein each of the measurement units further comprises: a reflective prism adjustment assembly;
the reflection prism is arranged on the reflection prism adjusting assembly, and the reflection prism adjusting assembly is used for controlling the reflection prism to move in or out of the measuring light path.
6. The area array chromaticity measurement apparatus according to claim 1, further comprising: a chromaticity conversion unit;
the chromaticity conversion unit is used for obtaining conversion information from image data to chromaticity coordinate data according to the central point chromaticity information of the sample to be detected and the image information of the sample to be detected, and obtaining non-central point chromaticity information of the sample to be detected according to the conversion information.
7. The area array chromaticity measurement method is characterized in that central point spectrum information and image information of a plurality of samples to be detected are acquired in a time-sharing manner; acquiring center point spectrum information of N samples to be detected in sequence, and acquiring center point spectrum information of the current Kth (K is more than or equal to 1 and less than or equal to N) sample to be detected, and acquiring image information of other M (M is more than or equal to 0 and less than or equal to N-1) samples to be detected; acquiring the image information of the N samples to be detected before acquiring the center point spectrum information of the N samples to be detected, or acquiring the center point spectrum information of the N samples to be detected and the image information of the N samples to be detected simultaneously;
and obtaining the central point chromaticity information of the sample to be detected according to the central point spectrum information of the sample to be detected.
8. The area array chromaticity measurement method according to claim 7, further comprising: and obtaining conversion information from the image data to chromaticity coordinate data according to the central point chromaticity information of the sample to be detected and the image information of the sample to be detected, and obtaining non-central point chromaticity information of the sample to be detected according to the conversion information.
9. The area array chromaticity measurement method according to claim 7, wherein the time-sharing obtaining of the center point spectral information and the image information of the plurality of samples to be detected specifically comprises:
each sample to be detected corresponds to one measuring unit, the measuring units are respectively connected with a coupler, and the coupler is connected with a spectrometer;
setting a reflection prism in each measuring unit, and moving the reflection prism of one measuring unit into a measuring light path to obtain the center point spectrum information of the sample to be detected; the method comprises the steps that image information of a sample to be detected is obtained by moving a reflecting prism of a measuring unit out of a measuring light path; and controlling the reflecting prisms of the plurality of measuring units to move in or out of the measuring light path in a time-sharing manner, so that the spectrum information and the image information of the central points of the plurality of samples to be detected can be acquired in a time-sharing manner.
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| CN113125117B (en) * | 2021-03-18 | 2024-04-19 | 苏州华兴源创科技股份有限公司 | Chromaticity detection method for display module |
| CN114441042A (en) * | 2022-01-25 | 2022-05-06 | 武汉精立电子技术有限公司 | Multi-sensor-based brightness and chromaticity measurement system and method |
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