WO2022111592A1 - 色度仪 - Google Patents

色度仪 Download PDF

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Publication number
WO2022111592A1
WO2022111592A1 PCT/CN2021/133210 CN2021133210W WO2022111592A1 WO 2022111592 A1 WO2022111592 A1 WO 2022111592A1 CN 2021133210 W CN2021133210 W CN 2021133210W WO 2022111592 A1 WO2022111592 A1 WO 2022111592A1
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WO
WIPO (PCT)
Prior art keywords
light
galvanometer
spectrometer
colorimeter
screen
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Application number
PCT/CN2021/133210
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English (en)
French (fr)
Inventor
王超
姜帆
张双垒
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华为技术有限公司
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Publication of WO2022111592A1 publication Critical patent/WO2022111592A1/zh

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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
    • 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
    • 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
    • G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
    • G01J5/02—Constructional details
    • G01J5/08—Optical arrangements
    • 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
    • G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
    • G01J5/60—Radiation pyrometry, e.g. infrared or optical thermometry using determination of colour temperature

Definitions

  • the embodiments of the present application relate to the field of display screen detection, and in particular, to a colorimeter.
  • a colorimeter is an important instrument for detecting the color consistency of the screen to be tested. The higher the color consistency of the screen to be tested, the better the user experience.
  • the colorimeter 002 includes: a filter 020 and a camera 021 .
  • the camera 021 is located on the light-emitting side of the screen to be tested 001, and the filter 020 is located between the camera 021 and the screen to be tested 001.
  • the filter 020 is divided into three types: R (red), G (green), and B (blue). 021 can be used to analyze the light passing through the filter and measure the chromaticity information of different points on the screen to be tested.
  • the above-mentioned colorimeter has a strong dependence on the filter, the quality of the filter affects the result of chromaticity, and the measurement accuracy of the camera is low.
  • the embodiment of the present application provides a colorimeter, which solves the problem of low measurement accuracy of the colorimeter.
  • a colorimeter including: a scanning galvanometer, and a spectrometer located on the light-emitting side of the scanning galvanometer, and the scanning galvanometer is used to scan the screen to be measured. , each time the light emitted by a light-emitting point on the screen to be tested is obtained, and the light emitted by each light-emitting point on the screen to be tested is reflected to the light incident side of the spectrometer; the spectrometer is used to detect the light, and obtain each The spectral information corresponding to the light-emitting point is converted into the chromaticity information of each light-emitting point. Therefore, the colorimeter adopts a spectrometer, which can measure the spectral information of each measurement point, and then convert it into chromaticity information. Compared with the use of optical filters, the measurement accuracy is high; Increased measurement speed.
  • the colorimeter further includes: a scanning lens, the screen to be tested is located on the focal plane of the scanning lens, and the distance between the screen to be tested and the scanning lens is equal to the distance of the scanning lens. focal length. Therefore, it is convenient for the scanning lens to obtain the light-emitting points on the screen to be tested.
  • the scanning galvanometer further includes: a first galvanometer, and a first driver connected with the first galvanometer, and the first driver is used to drive the first galvanometer to rotate around the first axis rotation; a second galvanometer, and a second driver connected with the second galvanometer, the second driver is used to drive the second galvanometer to rotate around the second axis of rotation; wherein, changing the first galvanometer and the second galvanometer When the angle of at least one of the second galvanometer mirrors is different, the positions of the acquired light-emitting points are different. Therefore, the driver is used to drive the galvanometer to rotate, which improves the detection efficiency.
  • the included angle between the first rotation axis and the second rotation axis is 90°.
  • the transmission direction of the light can be changed, which is more flexible and convenient.
  • the method further includes: a tube mirror, the tube mirror is located between the scanning galvanometer and the spectrometer, and the tube mirror is used to send the light emitted by the scanning galvanometer to the spectrometer. Thereby, the light emitted by the luminous point can be directed to the spectrometer.
  • the spectrometer includes: a converging hole, the converging hole is located at the focal position of the tube mirror, and the light emitted by the light-emitting point can be incident into the spectrometer through the converging hole. Therefore, the converging hole is located at the focal position of the tube mirror, and the light-emitting point is located at the focal plane of the scanning lens.
  • the converging hole and the light-emitting point are in a conjugate relationship, so that only the light emitted from the light-emitting point can be incident into the spectrometer through the converging hole, avoiding External light interference improves the measurement accuracy of the colorimeter.
  • the spectrometer includes: an optical fiber, the optical fiber is located at the focal position of the tube mirror, and the light emitted by the light-emitting point can be incident into the spectrometer through the optical fiber. Therefore, the optical fiber and the light-emitting point are in a conjugate relationship, so that only the light emitted from the light-emitting point can be incident into the spectrometer through the optical fiber, avoiding external light interference, and improving the measurement accuracy of the colorimeter.
  • the chromaticity information includes: color coordinates and color temperature.
  • Fig. 1 is the structural representation of a kind of colorimeter
  • FIG. 2 is a schematic structural diagram of a colorimeter provided in an embodiment of the present application.
  • Fig. 3 is the working state schematic diagram of the second galvanometer in Fig. 2;
  • Fig. 4 is the structural representation of the screen to be tested in Fig. 2;
  • Fig. 5 is the spectral information curve diagram of the colorimeter in Fig. 2;
  • FIG. 6 is a schematic structural diagram of another colorimeter provided in an embodiment of the present application.
  • Fig. 7 is the working state schematic diagram of the second galvanometer in Fig. 6;
  • Fig. 8 is the structural representation of the screen to be tested in Fig. 6;
  • Fig. 9 is the spectral information simulation graph of the colorimeter in Fig. 6;
  • FIG. 10 is a schematic structural diagram of another colorimeter provided by an embodiment of the application.
  • Fig. 11 is the working state schematic diagram of the second galvanometer in Fig. 10;
  • FIG. 12 is a schematic structural diagram of the screen to be tested in FIG. 10;
  • Fig. 13 is the spectral information graph of the colorimeter in Fig. 10;
  • FIG. 14 is a schematic structural diagram of a colorimeter provided by an embodiment of the application.
  • Fig. 15 is the working state schematic diagram of the galvanometer in Fig. 14;
  • FIG. 16 is a schematic structural diagram of the screen to be tested in FIG. 14;
  • Fig. 17 is the spectral information graph of the colorimeter in Fig. 14;
  • FIG. 18 is a flowchart of a chromaticity detection method provided by an embodiment of the present application.
  • orientation terms such as “upper” and “lower” are defined relative to the orientation in which the components in the drawings are schematically placed. It should be understood that these directional terms are relative concepts, and they are used for relative In the description and clarification of the drawings, it may change correspondingly according to the change of the orientation in which the components are placed in the drawings.
  • Spectrometer a device that measures the intensity of spectral lines at different wavelengths with photodetectors such as photomultiplier tubes. It consists of an entrance slit, a dispersive system, an imaging system and one or more exit slits. The electromagnetic radiation of the radiation source is separated into the required wavelength or wavelength region by the dispersive element, and the intensity is measured at the selected wavelength (or scanning a certain band).
  • Chroma Color is represented by brightness and chroma. Chroma is the property of color excluding brightness, which reflects the hue and saturation of the color.
  • Color temperature is a unit of measurement that expresses the color components contained in light.
  • Color Coordinates The coordinates of the color. Also called table color. Commonly used color coordinates, the horizontal axis is x, and the vertical axis is y. With color coordinates, a point can be identified on the chromaticity diagram. This point precisely represents the emission color. That is: the color coordinates accurately represent the color.
  • FIG. 2 is a colorimeter provided by an embodiment of the present application.
  • the colorimeter 0001 includes: a scanning galvanometer 102 , and a spectrometer 105 located on the light-emitting side of the scanning galvanometer 102 .
  • the scanning galvanometer 102 is used to scan the screen to be measured 001, obtains the light emitted by a light-emitting point on the screen to be tested each time, and reflects the light emitted by the light-emitting point to the light-incident side of the spectrometer, so
  • the spectrometer 105 is used to measure the spectral information of each light-emitting point, and convert the spectral information of each light-emitting point into color coordinates and chromaticity information of each light-emitting point.
  • the scanning galvanometer 102 can use an oscillating motor.
  • the basic principle is that the energized coil generates a torque in the magnetic field, and the rotor is added with a reset torque through a mechanical spring or electronic method.
  • the magnitude is proportional to the angle that the rotor deviates from the equilibrium position.
  • the electromagnetic torque is equal to the restoring torque, and the galvanometer is deflected under the action of the swing motor.
  • the general light source is a complex color light mixed with different wavelengths of color light. If the intensity of each color light in its spectrum is measured with a spectrophotometer, the value of the radiation intensity of different wavelengths of color light can be obtained.
  • the spectrometer 105 can decompose light with complex composition into spectral lines, which are composed of prisms or diffraction gratings, etc.
  • the spectrometer 105 can be used to measure the light reflected by the surface of the object.
  • the spectrometer 105 includes: an entrance slit, a collimating element, a dispersive element, a focusing element, and a detector array.
  • the incident slit is used to form the object point of the imaging system of the spectrometer 105 under the illumination of the incident light.
  • the collimating element can make the light emitted by the slit into parallel light.
  • the collimating element can be a separate lens, mirror, or directly integrated on a dispersive element, such as the concave grating in concave grating spectrometer 105 .
  • Dispersive elements usually gratings, can spatially disperse an optical signal into multiple beams by wavelength.
  • a focusing element can be used to focus the dispersed beam to form a series of images of the incident slit in the focal plane, where each image point corresponds to a specific wavelength.
  • a detector array is placed, for example, at the focal plane for measuring the light intensity of each wavelength image point.
  • the detector array may be a charge-coupled device (CCD) array or other kinds of photodetector arrays.
  • the scanning galvanometer collects the light emitted by each light-emitting point on the screen 001 to be tested into the spectrometer 105 by scanning, and the spectrometer 105 detects the light to obtain the spectrum corresponding to each light-emitting point. information, and convert spectral information into color coordinates, color temperature and other chromaticity information of each light-emitting point, so as to realize high-precision and rapid measurement of chromaticity information.
  • the colorimeter provided by the embodiment of the present application can quickly scan the screen to be tested by using the scanning galvanometer, and send the light emitted by each light-emitting point on the screen to be tested to the spectrometer, and then the spectrometer can accurately measure each screen on the screen to be tested.
  • the chromaticity information of the point Compared with the colorimeter in the prior art, no filter needs to be set, and the measurement accuracy is improved.
  • the colorimeter includes: a scanning lens 101 , the screen to be tested 001 is located at the focal position of the scanning lens 101 , and the screen to be tested 001 and the scanning lens 101 are located between the The distance is equal to the focal length of the scanning lens 101 .
  • the scanning lens 101 can convert the transmitted light into parallel light.
  • the screen 001 to be tested is set at the focal plane of the scanning lens 101, the light emitted by the light-emitting points on the screen to be tested 001 can be converted into parallel light after passing through the scanning lens 101, which is convenient for scanning the screen 001 to be tested by the scanning galvanometer 102 scanning.
  • the scanning galvanometer 102 further includes: a first galvanometer 1022 , a second galvanometer 1024 , a first driver 1021 and a second driver 1023 .
  • the first driver 1021 is connected to the first galvanometer mirror 1022, and the first driver 1021 is used to drive the first galvanometer mirror 1022 to rotate around a first rotation axis.
  • the first rotation axis is, for example, the Y axis, and the first galvanometer 1022 can rotate around the Y axis under the driving of the first driver 1021 .
  • the second driver 1023 is connected to the second galvanometer 1024, and the second driver 1023 is used to drive the second galvanometer 1024 to rotate around the second rotation axis.
  • the second rotation axis is, for example, the X axis, and the second galvanometer 1024 can be rotated around the X axis under the driving of the second driver 1023 .
  • the included angle between the first rotation axis and the second rotation axis is 90°.
  • the colorimeter further includes: a tube mirror 103, the tube mirror 103 is located between the scanning galvanometer 102 and the spectrometer 105, and the tube mirror 103 is used for sending the light emitted by the scanning galvanometer 102 to The spectrometer 105.
  • the spectrometer 105 includes: a converging hole 104 , the converging hole 104 is located at the focal position of the tube mirror 103 , and the light emitted by the light-emitting point can be incident on the spectrometer 105 through the converging hole 104 middle.
  • the spectrometer 105 includes: an optical fiber, one end of the optical fiber is connected to the tube mirror 103, and the other end is connected to the spectrometer 105, and the light emitted by the light-emitting point can pass through the convergence hole 104 is incident into the spectrometer 105 .
  • the above-mentioned screen 001 to be tested is located on the focal plane of the scanning lens 101, the converging hole of the spectrometer 105 is located at the focal point of the tube mirror 103, the light-emitting point and the converging hole 104 are in a conjugate relationship, and only the light-emitting point A is emitted.
  • the light can enter the spectrometer 105 through the converging hole 104 or the optical fiber, and the spectrometer 105 can measure the spectral information of each light-emitting point on the screen 001 to be tested, so as to obtain the chromaticity and brightness of all light-emitting points.
  • the light emitted by the screen to be tested passes through the scanning lens 101, the galvanometer 102, the tube mirror 103, and the converging hole 104, and is incident on the spectrometer 105.
  • the light-emitting point and the converging hole 104 are in a conjugate relationship, and only the light-emitting point A is emitted. Only the light emitted from the light can be incident into the spectrometer 105 through the converging hole 104 or the optical fiber, and the spectral information of the light-emitting point can be measured by the spectrometer 105, so as to obtain the chromaticity, brightness, and the like.
  • the first driver 1021 is used to drive the first galvanometer 1022 to rotate by a preset angle around the first rotation axis
  • the second driver 1023 is used to drive the second galvanometer 1024 to rotate by a dummy angle around the second rotation axis
  • the position of the light-emitting point incident into the converging hole 104 can be changed.
  • the first galvanometer 1022 and the second galvanometer 1024 to rotate by the first driver 1021 and the second driver 1023, light emitted by different light-emitting points can be acquired at different times, thereby realizing surface scanning.
  • the screen to be tested 001 is located on the focal plane of the scanning lens 101 .
  • the first galvanometer 1022 and the second galvanometer 1024 are located between the scanning lens 101 and the tube mirror 103 , the converging hole 104 is located at the focal position of the tube mirror 103 , and the entrance of the spectrometer 105 is close to the converging hole 104 .
  • the convergence hole 104 may be replaced by an optical fiber, and one end of the optical fiber is used as the convergence hole 104 , and the other end is connected to the spectrometer 105 .
  • the distance between the first galvanometer mirror 1022 and the second galvanometer mirror 1024 depends on the area of the galvanometer mirrors. On the premise that the rotation of the two galvanometer mirrors does not interfere, the smaller the distance, the better.
  • the light emitted by the screen to be measured 001 passes through the scanning lens 101, the galvanometer, the tube mirror 103, and the converging hole 104, and is incident on the spectrometer 105, wherein the light-emitting point and the converging hole 104 are in a conjugate relationship, and only the light-emitting point A is emitted. Only the light emitted from the light can be incident into the spectrometer 105 through the converging hole 104 or the optical fiber, and the spectral information of the light-emitting point can be measured by the spectrometer 105, so as to obtain the chromaticity, brightness, and the like.
  • the chromaticity information can be converted by the spectral information, and after the spectral information is measured, the chromaticity information, such as color temperature, color coordinates, etc., can be calculated.
  • spectral information of light-emitting points at different positions can be obtained at different times, and chromaticity information of light-emitting points at different positions of the screen 001 to be tested can be obtained.
  • the measurement process can be divided into time 1, time 2, time 3... time n, and each time corresponds to a different measurement point.
  • Time 1 As shown in FIG. 2 and FIG. 3 , the first galvanometer 1022 and the second galvanometer 1024 are at 45 degrees to the incident light. At this time, point A is conjugated to the converging hole 104 , and only the light of point A can be measured by the spectrometer 105 through the converging hole 104 .
  • point A is located in the middle of the screen 001 to be tested.
  • the abscissa is the wavelength, and the ordinate is the relative energy.
  • Time 2 As shown in Figure 6 and Figure 7, the second galvanometer 1024 rotates by ⁇ , and the first galvanometer 1022 is at 45 degrees to the incident light. At this time, the chromaticity information of point B can be measured. This is due to the conjugate relationship, only the light at point B will be measured by the spectrometer 105 through the converging hole 104 or the optical fiber.
  • the spectral information of point B can be measured at this time, and the spectral information can be converted into chromaticity information.
  • Time 3 As shown in FIG. 10, at the measurement position C, due to the conjugation relationship, only the light at point C will be measured by the spectrometer 105 through the converging hole 104 or the optical fiber.
  • the angle of the galvanometer corresponding to point C is: the second galvanometer 1024 rotates by ⁇ , and the first galvanometer 1022 is 45 degrees from the incident light.
  • the spectral information of point C can be measured at this time, and then the chromaticity information of point C can be obtained.
  • FIG. 14 is a schematic diagram of the colorimeter measuring the chromaticity information of the screen 001 to be tested.
  • the second galvanometer 1024 rotates by ⁇
  • the first galvanometer 1022 rotates by ⁇ .
  • point D is conjugated with the converging hole 104 , and the spectral information of point D can be measured by the spectrometer 105 to obtain the chromaticity information of point D.
  • the spectral information of point D can be measured, and the spectral information can be converted into chromaticity information.
  • the chromaticity measurement of the entire surface of the display screen under test can be realized.
  • FIG. 18 is a flowchart of a chromaticity detection method provided by an embodiment of the present application.
  • the colorimetric detection method shown in FIG. 18 is used in the colorimeter shown in FIG. 2 .
  • the chromaticity detection method for example, includes the following steps:
  • S101 Scan the screen 001 to be tested, and acquire light emitted by a light-emitting point on the screen 001 to be tested each time.
  • the colorimeter includes: a scanning galvanometer 102 , through which the screen 001 to be tested can be scanned.
  • the scanning galvanometer 102 includes: a first galvanometer 1022, and a first driver 1021 connected to the first galvanometer 1022, and the first driver 1021 is used to drive the first galvanometer 1022 around a first rotation axis turn;
  • the second galvanometer 1024, and the second driver 1023 connected to the second galvanometer 1024, the second driver 1023 is used to drive the second galvanometer 1024 to rotate around the second rotation axis, and the scanning to be measured Screen 001, each time the light emitted by a light-emitting point on the screen 001 to be tested is obtained, including:
  • the angle of at least one of the first galvanometer mirror 1022 and the second galvanometer mirror 1024 is changed to obtain light emitted by one light-emitting point, wherein the positions of different light-emitting points are different.
  • the included angle between the first rotation axis and the second rotation axis is 90°.
  • the scanning galvanometer 102 includes: a scanning lens 101, the screen to be tested 001 is located at the focal position of the scanning lens 101, and the distance between the screen to be tested 001 and the scanning lens 101 is equal to the scanning lens The focal length of 101 is set, and the scanning lens 101 is used for emitting the light emitted by the light-emitting point to the scanning galvanometer 102 .
  • the colorimeter includes: a spectrometer 105 , and light can be detected by the spectrometer 105 .
  • the colorimeter further includes, for example, a tube mirror 103 , the tube mirror 103 is located between the scanning galvanometer 102 and the spectrometer 105 , and the tube mirror 103 is used for the light reflected by the scanning galvanometer 102 Convergence to the entrance of the spectrometer 105 .
  • the spectrometer 105 includes: a converging hole 104 , the converging hole 104 is located at the focal position of the tube mirror 103 , and the light emitted by the light-emitting point can be incident into the spectrometer 105 through the converging hole 104 .
  • the spectrometer 105 includes: an optical fiber, the optical fiber is located at the focal position of the tube mirror 103 , and the light emitted by the light-emitting point can be incident into the spectrometer 105 through the optical fiber.

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  • Spectroscopy & Molecular Physics (AREA)
  • General Physics & Mathematics (AREA)
  • Spectrometry And Color Measurement (AREA)

Abstract

一种色度仪（0001）包括：扫描振镜（102），以及位于扫描振镜（102）出光侧的光谱仪（105），扫描振镜（102）用于扫描待测屏幕（001），每次获取待测屏幕（001）上一个发光点发出的光线，并将待测屏幕（001）上每个发光点发出的光线反射至光谱仪（105）的入光侧；光谱仪（105）用于对光线进行检测，得到每个发光点对应的光谱信息，并将光谱信息转化为每个发光点的色度信息。由此，色度仪（0001）采用光谱仪（105），可以测量每个测量点的光谱信息，进而转化为色度信息，测量精度高；同时色度仪（0001）采用振镜扫描方式，提高了测量速度。

Description

色度仪
本申请要求于2020年11月27日提交国家知识产权局、申请号为202011365098.2、申请名称为“色度仪及色度检测方法”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请实施例涉及显示屏检测领域，尤其涉及一种色度仪。
背景技术
色度仪是用于检测待测屏幕色彩的一致性的一种重要仪器，待测屏幕色彩的一致性越高，用户体验越好。
如图1所示，色度仪002包括：滤光片020和相机021。相机021位于待测屏幕001的出光侧，滤光片020位于相机021和待测屏幕001之间，滤光片020分为R(红)、G(绿)、B(蓝)三种,相机021可以用于分析通过滤光片的光,测得待测屏幕不同点的色度信息。
然而，上述色度仪对滤光片依赖性较强，滤光片的质量影响色度的结果，且相机测量精度低。
实用新型内容
本申请实施例提供一种色度仪，解决了色度仪测量精度低的问题。
为达到上述目的，本申请采用如下技术方案：第一方面，提供一种色度仪，包括：扫描振镜，以及位于该扫描振镜出光侧的光谱仪，该扫描振镜用于扫描待测屏幕，每次获取待测屏幕上一个发光点发出的光线，并将该待测屏幕上每个发光点发出的光线反射至光谱仪的入光侧；该光谱仪用于对该光线进行检测，得到每个该发光点对应的光谱信息，并将该光谱信息转化为每个发光点的色度信息。由此，该色度仪采用光谱仪，可以测量每个测量点的光谱信息，进而转化为色度信息，与采用滤光片相比，测量精度高；同时该色度仪采用振镜扫描方式，提高了测量速度。
一种可选的实现方式中，该色度仪还包括：扫描透镜，该待测屏幕位于该扫描透镜的焦平面上，且该待测屏幕与该扫描透镜之间的距离等于该扫描透镜的焦距。由此，方便扫描透镜获取待测屏幕上的发光点。
一种可选的实现方式中，该扫描振镜还包括：第一振镜，以及与该第一振镜连接的第一驱动器，该第一驱动器用于驱动该第一振镜围绕第一转动轴转动；第二振镜，以及与该第二振镜连接的第二驱动器，该第二驱动器用于驱动该第二振镜围绕第二转动轴转动；其中，改变该第一振镜和该第二振镜中至少一个的角度时，获取的发光点的位置不同。由此，采用驱动器驱动振镜转动，提高了检测效率。
一种可选的实现方式中，该第一转动轴和该第二转动轴的夹角为90°。由此，可以改变光线的传输方向，更加灵活方便。
一种可选的实现方式中，还包括：管镜，该管镜位于该扫描振镜和该光谱仪之间，该管镜用于将该扫描振镜发射的光线发送至该光谱仪。由此，可以将发光点发出的光线导向光谱仪。
一种可选的实现方式中，该光谱仪包括：汇聚孔，该汇聚孔位于该管镜的焦点位置， 该发光点发出的光线可以经过该汇聚孔入射至光谱仪中。由此，该汇聚孔位于管镜焦点位置，发光点位于扫描透镜的焦平面，该汇聚孔和发光点为共轭关系，使得只有发光点处发出的光才能经过汇聚孔入射到光谱仪中，避免外部光线干扰，提高了色度仪的测量精度。
一种可选的实现方式中，该光谱仪包括：光纤，该光纤位于该管镜的焦点位置，该发光点发出的光线可以经过该光纤入射至光谱仪中。由此，该光纤和发光点为共轭关系，使得只有发光点处发出的光才能经过光纤入射到光谱仪中，避免外部光线干扰，提高了色度仪的测量精度。
一种可选的实现方式中，该色度信息包括：色坐标、色温。
附图说明
图1为一种色度仪的结构示意图；
图2为本申请实施例提供的一种色度仪的结构示意图；
图3为图2中第二振镜的工作状态示意图；
图4为图2中待测屏幕的结构示意图；
图5为图2中色度仪的光谱信息曲线图；
图6为本申请实施例提供的另一种色度仪的结构示意图；
图7为图6中第二振镜的工作状态示意图；
图8为图6中待测屏幕的结构示意图；
图9为图6中色度仪的光谱信息仿真曲线图；
图10为本申请实施例提供的另一种色度仪的结构示意图；
图11为图10中第二振镜的工作状态示意图；
图12为图10中待测屏幕的结构示意图；
图13为图10中色度仪的光谱信息曲线图；
图14为本申请实施例提供的一种色度仪的结构示意图；
图15为图14中振镜的工作状态示意图；
图16为图14中待测屏幕的结构示意图；
图17为图14中色度仪的光谱信息曲线图；
图18为本申请实施例提供的一种色度检测方法流程图。
具体实施方式
为了使本申请的目的、技术方案和优点更加清楚，下面将结合附图对本申请作进一步地详细描述。
以下，术语“第一”、“第二”等仅用于描述目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”等的特征可以明示或者隐含地包括一个或者更多个该特征。在本申请的描述中，除非另有说明，“多个”的含义是两个或两个以上。
此外，本申请中，“上”、“下”等方位术语是相对于附图中的部件示意置放的方位来定义的，应当理解到，这些方向性术语是相对的概念，它们用于相对于的描述和澄清，其可以根据附图中部件所放置的方位的变化而相应地发生变化。
名词解释：
光谱仪：以光电倍增管等光探测器测量谱线不同波长位置强度的装置。它由一个入射狭缝，一个色散系统，一个成像系统和一个或多个出射狭缝组成。以色散元件将辐射源的电磁辐射分离出所需要的波长或波长区域，并在选定的波长上(或扫描某一波段)进行强度测定。
色度：颜色是由亮度和色度共同表示的，色度是不包括亮度在内的颜色的性质，它反映的是颜色的色调和饱和度。
色温：色温是表示光线中包含颜色成分的一个计量单位。
色坐标：就是颜色的坐标。也叫表色系。常用的颜色坐标，横轴为x，纵轴为y。有了色坐标，可以在色度图上确定一个点。这个点精确表示了发光颜色。即：色坐标精确表示了颜色。
图2为本申请实施例提供的色度仪，如图2所示，该色度仪0001包括：扫描振镜102，以及位于所述扫描振镜102出光侧的光谱仪105。
其中，所述扫描振镜102用于扫描待测屏幕001，每次获取所述待测屏幕上一个发光点发出的光线，并将所述发光点发出的光线反射至光谱仪的入光侧，所述光谱仪105用于测量每个发光点的光谱信息，并将每个发光点的光谱信息转化为每个发光点的色坐标和色度信息。
扫描振镜102可以采用摆动电机，基本原理是通电线圈在磁场中产生力矩，其转子上通过机械纽簧或电子的方法加有复位力矩，大小与转子偏离平衡位置的角度成正比，当线圈通以一定的电流而转子发生偏转到一定的角度时，电磁力矩与回复力矩大小相等，振镜在摆动电机的作用下发生偏转。
需要说明的是，光源的光色特性及其表征量如色坐标、色温等是由光源的光谱能量分布决定的，所以需要更好地了解光源的光谱分布特性。一般的光源是不同波长的色光混合而成的复色光，如果将它的光谱中每种色光的强度用分光光度计测量出来，就可以获得不同波长色光的辐射强度的数值。
光谱仪105可以将成分复杂的光分解为光谱线，由棱镜或衍射光栅等构成，利用光谱仪105可测量物体表面反射的光线。
光谱仪105包括：入射狭缝、准直元件、色散元件、聚焦元件及探测器阵列。
其中，入射狭缝用于在入射光的照射下形成光谱仪105成像系统的物点。准直元件可以使狭缝发出的光线变为平行光。该准直元件可以是一独立的透镜、反射镜、或直接集成在色散元件上，如凹面光栅光谱仪105中的凹面光栅。
色散元件，通常采用光栅，可以使光信号在空间上按波长分散成为多条光束。
聚焦元件可以用于聚焦色散后的光束，使其在焦平面上形成一系列入射狭缝的像，其中每一像点对应于一特定波长。
探测器阵列例如放置于焦平面，用于测量各波长像点的光强度。该探测器阵列可以是电荷耦合元件(Charge-coupled Device，CCD)阵列或其它种类的光探测器阵列。
工作时，该扫描振镜通过扫描的方式，将待测屏幕001上每个发光点发出的光收集到光谱仪105中，光谱仪105对所述光线进行检测，得到每个所述发光点对应的光谱信息，并将光谱信息转化为每个发光点的色坐标、色温等色度信息，实现高精度快速测量色度信息等。
本申请实施例提供的色度仪，可以通过扫描振镜快速扫描待测屏幕，将待测屏幕上每个发光点发出的光线发送给光谱仪，进而可以通过光谱仪精确测得待测屏幕上每个点的色度信息。与现有技术中的色度仪相比，无需设置滤光片，提高了测量精度。
在本申请一些实施例中，所述色度仪包括：扫描透镜101，所述待测屏幕001位于所述扫描透镜101的焦点位置，且所述待测屏幕001与所述扫描透镜101之间的距离等于所述扫描透镜101的焦距。其中，扫描透镜101可以将透过的光线转化为平行光。
由此，将待测屏幕001设置在扫描透镜101的焦平面处，可以将待测屏幕001上的发光点发出的光线经过扫描透镜101后转化为平行光，便于扫描振镜102对待测屏幕001扫描。
所述扫描振镜102还包括：第一振镜1022，第二振镜1024、第一驱动器1021和第二驱动器1023。
第一驱动器1021与所述第一振镜1022连接，所述第一驱动器1021用于驱动所述第一振镜1022围绕第一转动轴转动。其中，第一转动轴例如为Y轴，所述第一振镜1022可以在第一驱动器1021的驱动下绕Y轴转动。
第二驱动器1023与所述第二振镜1024连接，所述第二驱动器1023用于驱动所述第二振镜1024围绕第二转动轴转动。第二转动轴例如为X轴，第二振镜1024可以在第二驱动器1023的驱动下绕X轴转动。
当改变所述第一振镜1022和所述第二振镜1024中至少一个的角度时，获取的发光点的位置发生改变。
所述第一转动轴和所述第二转动轴的夹角为90°。
色度仪例如还包括：管镜103，所述管镜103位于所述扫描振镜102和所述光谱仪105之间，所述管镜103用于将所述扫描振镜102发射的光线发送至所述光谱仪105。
在本申请一些实施例中，该光谱仪105包括：汇聚孔104，所述汇聚孔104位于所述管镜103的焦点位置，所述发光点发出的光线可以经过所述汇聚孔104入射至光谱仪105中。
在本申请另一些实施例中，该光谱仪105包括：光纤，所述光纤一端与所述管镜103连接，另一端与所述光谱仪105连接，所述发光点发出的光线可以经过所述汇聚孔104入射至光谱仪105中。
需要说明的是，上述待测屏幕001位于扫描透镜101的焦平面上，光谱仪105的汇聚孔位于管镜103的焦点处，发光点与汇聚孔104是共轭关系，只有发光点A处发出的光才能经过汇聚孔104或光纤入射到光谱仪105中，可以通过光谱仪105测量待测屏幕001上每个发光点的光谱信息，从而求得所有发光点的色度、亮度等。
工作过程：待测屏幕发出的光经过扫描透镜101、振镜102、管镜103、汇聚孔104，入射到光谱仪105中，其中发光点与汇聚孔104是共轭关系，只有发光点A处发出的光才能经过汇聚孔104或光纤入射到光谱仪105中，通过光谱仪105测量发光点的光谱信息，从而求得色度、亮度等。
当第一驱动器1021用于驱动所述第一振镜1022围绕第一转动轴转动预设角度，或第二驱动器1023用于驱动所述第二振镜1024围绕第二转动轴转动虚设角度时，可 以改变入射到汇聚孔104中的发光点的位置。由此，通过第一驱动器1021和第二驱动器1023驱动第一振镜1022和第二振镜1024转动，在不同时刻可以获取不同的发光点发出的光线，从而实现面扫描。
示例一：
如图2所示，待测屏幕001位于扫描透镜101焦平面上。
第一振镜1022、第二振镜1024位于扫描透镜101与管镜103之间，汇聚孔104位于管镜103焦点位置，光谱仪105入射口紧贴汇聚孔104。在本申请另一些实施例中，汇聚孔104可以用光纤替代，将光纤一端当做汇聚孔104，另外一端接光谱仪105。
需要说明的是，第一振镜1022、第二振镜1024之间的间距取决于振镜的面积，在两个振镜转动不干涉的前提下，间距越小越好。
测量时，待测屏幕001发出的光经过扫描透镜101、振镜、管镜103、汇聚孔104，入射到光谱仪105中，其中发光点与汇聚孔104是共轭关系，只有发光点A处发出的光才能经过汇聚孔104或光纤入射到光谱仪105中，通过光谱仪105测量发光点的光谱信息，从而求得色度、亮度等。
其中，色度信息可以通过光谱信息进行转化，测得光谱信息后即可以计算得到色度信息，如色温、色坐标等。
本示例可以在不同时刻，获得不同位置的发光点的光谱信息，得到待测屏幕001不同位置发光点的色度信息。
以下可以把测量过程分为时刻1、时刻2、时刻3……时刻n，每个时刻对应一个不同的测量点。
时刻1：如图2、图3所示，第一振镜1022、第二振镜1024与入射光线成45度。此时，A点与汇聚孔104共轭，只有A点的光可以经过汇聚孔104被光谱仪105测量。
如图4所示，A点位于待测屏幕001的中间位置。
如图5所示，横坐标为波长，纵坐标为相对能量。由此，可以得到A发光点的光谱信息，接着可以将光谱信息转化为色度信息。
时刻2：如图6、图7所示，第二振镜1024转动θ,第一振镜1022与入射光线成45度，此时可以测得B点的色度信息，这是由于共轭的关系，只有点B处的光会经过汇聚孔104或光纤被光谱仪105测量。
如图8所示，A点和B点间距为L，L满足：
L＝tan(2θ)*f1。
如图9所示，此时可以测得B点的光谱信息，通过光谱信息转化为色度信息。
时刻3：如图10所示，测量位置C，由于共轭的关系，只有点C处的光会经过汇聚孔104或光纤被光谱仪105测量。
如图11所示，C点对应的振镜角度为：第二振镜1024转动α,第一振镜1022与入射光线成45度。
如图12所示，A点和C点之间间距为L2，L2满足：
L2＝tan(2α)*f1。
如图13所示，此时可以测得C点的光谱信息，进而得到C点的色度信息。
图14为色度仪对待测屏幕001色度信息的测量示意图。如图15中的(a)所示， 第二振镜1024转动α，如图15中的(b)所示，第一振镜1022转动β。如图14所示，此时D点与汇聚孔104共轭，D点的光谱信息可以被光谱仪105测量，从而获得D点的色度信息。
如图16所示，以A点为原点，D点的坐标为(x，y)，其中x满足：
x＝tan(2α)*f1。
Y满足：
y＝tan(2β)*f1。由此，可以得到D点的坐标信息。
如图17所示，可以测得D点的光谱信息，通过光谱信息转化为色度信息。
由此，可以得到D点处的色度信息。
如上所述，通过转动第一振镜1022与第二振镜1024到不同角度，可以实现整个被测显示屏表面的色度测量。
本申请还提供一种色度检测方法，图18为本申请实施例提供的一种色度检测方法的流程图。图18所示的色度检测方法用于图2所示的色度仪。如图18所示，该色度检测方法例如包括如下步骤：
S101、扫描待测屏幕001，每次获取待测屏幕001上一个发光点发出的光线。
其中，该色度仪包括：扫描振镜102，可以通过所述扫描振镜102扫描待测屏幕001。
该扫描振镜102包括：第一振镜1022，以及与所述第一振镜1022连接的第一驱动器1021，所述第一驱动器1021用于驱动所述第一振镜1022围绕第一转动轴转动；
第二振镜1024，以及与所述第二振镜1024连接的第二驱动器1023，所述第二驱动器1023用于驱动所述第二振镜1024围绕第二转动轴转动，所述扫描待测屏幕001，每次获取待测屏幕001上一个发光点发出的光线，包括：
改变所述第一振镜1022和所述第二振镜1024中至少一个的角度，获取一个发光点射出的光线，其中，不同发光点的位置不同。
所述第一转动轴和所述第二转动轴的夹角为90°。
所述扫描振镜102包括：扫描透镜101，所述待测屏幕001位于所述扫描透镜101的焦点位置，且所述待测屏幕001与所述扫描透镜101之间的距离等于所述扫描透镜101的焦距，所述扫描透镜101用于将发光点发出的光线发射至扫描振镜102。
S102、对光线进行检测，得到发光点对应的光谱信息，并将光谱信息转化为色度信息。
色度仪包括：光谱仪105，可以通过光谱仪105对光线进行检测。
此外，色度仪例如还包括：管镜103，所述管镜103位于所述扫描振镜102和所述光谱仪105之间，所述管镜103用于将所述扫描振镜102反射的光线汇聚至所述光谱仪105的入口。
所述光谱仪105包括：汇聚孔104，所述汇聚孔104位于所述管镜103的焦点位置，所述发光点发出的光线可以经过所述汇聚孔104入射至光谱仪105中。
所述光谱仪105包括：光纤，所述光纤位于所述管镜103的焦点位置，所述发光点发出的光线可以经过所述光纤入射至光谱仪105中。
以上所述，仅为本申请的具体实施方式，但本申请的保护范围并不局限于此，任 何在本申请揭露的技术范围内的变化或替换，都应涵盖在本申请的保护范围之内。因此，本申请的保护范围应以所述权利要求的保护范围为准。

Claims (8)

  1. 一种色度仪，其特征在于，包括：扫描振镜，以及位于所述扫描振镜出光侧的光谱仪，
    所述扫描振镜用于扫描待测屏幕，每次获取待测屏幕上一个发光点发出的光线，并将所述待测屏幕上每个发光点发出的光线反射至所述光谱仪的入光侧；
    所述光谱仪用于对所述光线进行检测，得到每个所述发光点对应的光谱信息，并将所述光谱信息转化为每个发光点的色度信息。
  2. 根据权利要求1所述的色度仪，其特征在于，所述色度仪还包括：扫描透镜，所述待测屏幕位于所述扫描透镜的焦平面上。
  3. 根据权利要求1或2所述的色度仪，其特征在于，所述扫描振镜包括：
    第一振镜，以及与所述第一振镜连接的第一驱动器，所述第一驱动器用于驱动所述第一振镜围绕第一转动轴转动；
    第二振镜，以及与所述第二振镜连接的第二驱动器，所述第二驱动器用于驱动所述第二振镜围绕第二转动轴转动；
    其中，改变所述第一振镜和所述第二振镜中至少一个的角度时，获取的发光点的位置发生改变。
  4. 根据权利要求3所述的色度仪，其特征在于，所述第一转动轴和所述第二转动轴的夹角为90°。
  5. 根据权利要求1-4任一项所述的色度仪，其特征在于，还包括：管镜，所述管镜位于所述扫描振镜和所述光谱仪之间，所述管镜用于将所述扫描振镜发射的光线发送至所述光谱仪的入光口。
  6. 根据权利要求5所述的色度仪，其特征在于，所述光谱仪靠近所述管镜的一侧还设有：汇聚孔，所述汇聚孔位于所述管镜的焦点位置，使得所述发光点发出的光线可以经过所述汇聚孔入射至光谱仪中。
  7. 根据权利要求5所述的色度仪，其特征在于，所述光谱仪靠近所述管镜的一侧还设有：光纤，所述光纤位于所述管镜的焦点位置，使得所述发光点发出的光线可以经过所述光纤入射至光谱仪中。
  8. 根据权利要求1-7任一项所述的色度仪，其特征在于，所述色度信息包括：色坐标、色温。
PCT/CN2021/133210 2020-11-27 2021-11-25 色度仪 WO2022111592A1 (zh)

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