Self-calibration colorimeter device with adjustable calibration position
By designing a self-calibrating colorimeter device with adjustable calibration position, and using a position adjustment mechanism to achieve multi-point calibration of the point probe, the problems of poor measurement accuracy and repeatability in the existing technology are solved, and the measurement precision and efficiency are improved.
Patent Information
- Application Number
- CN202520546917.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-26
- Publication Date
- 2026-01-27
- Estimated Expiration
- 2035-03-26
AI Technical Summary
The calibration position of existing imaging colorimeters is fixed and cannot be adjusted, which leads to decreased measurement accuracy and poor repeatability. Furthermore, the single-point calibration coverage is limited and cannot cover the entire detection area, resulting in inaccurate edge measurement results.
Design a self-calibrating colorimeter device with adjustable calibration position. The device drives a point probe to move through a position adjustment mechanism to achieve multi-point calibration. It includes a spectrometer module, a calibration module, and a detection module. The position adjustment in a two-dimensional plane is achieved by using an adjustment block and a drive module that are slidably connected in the X and Y directions.
It improves the measurement accuracy and reliability of the self-calibrating colorimeter, and enhances measurement precision and efficiency by correcting spatial non-uniformity through multi-point calibration.
Smart Images
Figure CN223841308U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of display device measurement technology, specifically to a self-calibrating colorimeter device with adjustable calibration position. Background Technology
[0002] With the rapid development of display technology, the uniformity of color and brightness of a display screen has become a key indicator for evaluating its quality. Imaging colorimeters, as the mainstream measurement tool, need to be calibrated to convert camera response data into true color and brightness values. Traditional methods typically involve adding a point colorimeter to the system to measure the color and brightness at the center of the display screen as a reference, but this method has many drawbacks.
[0003] In existing technologies, the calibration position of imaging colorimeters is fixed at the center point and cannot be adjusted. This may result in the calibration point not being in the center of the colorimeter's detection area, leading to decreased measurement accuracy and poor repeatability. Furthermore, single-point calibration has limited coverage, failing to cover the entire detection area of the colorimeter, resulting in inaccurate measurements at the edges. In addition, issues such as spatial non-uniformity of the colorimeter's detection area, limited dynamic range, environmental influences, and poor adaptability to complex lighting conditions further limit measurement accuracy and practical application effectiveness.
[0004] In summary, single-point calibration using the center point spectrum in imaging luminance meters suffers from drawbacks such as insufficient coverage, uniformity issues, and limited dynamic range, affecting the accuracy and reliability of measurements. Therefore, it is necessary to develop a device that allows for adjustable calibration positions in self-calibrating colorimeters. Utility Model Content
[0005] Based on the above description, this utility model provides a self-calibrating colorimeter device with adjustable calibration position. This device can perform multi-point calibration to improve the accuracy and reliability of the measurement.
[0006] The technical solution of this utility model to solve the above-mentioned technical problems is as follows:
[0007] A self-calibrating colorimeter device with adjustable calibration position includes a spectrophotometer module, a calibration module, and a detection module. The spectrophotometer module transmits a first ray of light to the detection module and reflects a second ray of light to the calibration module. The calibration module includes a point probe and a position adjustment mechanism, with the point probe mounted on the position adjustment mechanism.
[0008] Based on the above technical solution, the present invention can be further improved as follows.
[0009] Preferably, the position adjustment mechanism includes a first adjustment block and a second adjustment block. The point probe is fixedly installed on the first adjustment block. The first adjustment block and the second adjustment block are slidably connected. The first adjustment block can slide relative to the second adjustment block in the Y direction. The second adjustment block is slidably connected to the fixing member of the device and can slide in the X direction. The X direction and the Y direction are not parallel to each other.
[0010] Preferably, the first adjusting block is provided with a first sliding hole arranged along the Y direction, and the first sliding hole is slidably connected to the second adjusting block by bolts; the second adjusting block is provided with a second sliding hole arranged along the X direction, and the second sliding hole is slidably connected to the fixing part of the device by bolts.
[0011] Preferably, the first adjusting block is provided with a plurality of first sliding holes, and the second adjusting block is provided with a plurality of second sliding holes.
[0012] Preferably, the first adjusting block is provided with a first positioning pin, and the second adjusting block is provided with a Y-guide rail, wherein the first positioning pin is slidably engaged with the Y-guide rail.
[0013] Preferably, the second adjusting block is provided with a second positioning pin, and the fixing component of the device is provided with an X-guide rail, and the second positioning pin is slidably engaged with the X-guide rail.
[0014] Preferably, the position adjustment mechanism further includes an X-axis drive module and a Y-axis drive module. The X-axis drive module is driven by the second adjustment block and is used to drive the second adjustment block to move along the X-axis. The Y-axis drive module is driven by the first adjustment block and is used to drive the first adjustment block to move along the Y-axis.
[0015] Preferably, the first adjusting block is provided with a first through hole, the size of which is not less than the path dimension of the detection light of the point probe; the second adjusting block is provided with a second through hole, the size of which is not less than the range of the first adjusting block sliding along the Y direction; the second light output by the beam splitting module passes through the second through hole and the first through hole in sequence and then reaches the point probe.
[0016] Preferably, the point probe head is provided with an optical fiber sheath and a fixing base. The optical fiber sheath is fitted around the outer periphery of the point probe head, and the point probe head and the optical fiber sheath are connected to the first adjusting block through the fixing base.
[0017] Preferably, the calibration module includes multiple point probes, which are mounted on the mounting base and aligned with the beam splitter module.
[0018] Compared with the prior art, the technical solution of this application has the following beneficial technical effects: The device provided by this utility model can drive the point probe to move, and realize multi-point calibration of the screen under test by moving the point probe, thereby improving the accuracy and reliability of the self-calibrating colorimeter measurement. Attached Figure Description
[0019] Figure 1(a) is a schematic diagram of the existing self-calibrating colorimeter structure, and Figure 1(b) is a schematic diagram of the optical path principle of the self-calibrating colorimeter.
[0020] Figure 2 A schematic diagram of a self-calibrating colorimeter device with adjustable calibration position provided for an embodiment of this utility model;
[0021] Figure 3 This is a schematic diagram of the overall structure of the calibration module provided in an embodiment of the present utility model;
[0022] Figure 4 A schematic diagram of the bottom view structure of the calibration module provided in this embodiment of the utility model;
[0023] Figure 5 A schematic diagram of the bottom surface structure of the first adjusting block provided in an embodiment of this utility model;
[0024] Figure 6 This is a schematic diagram of the top surface view structure of the second adjustment block provided in an embodiment of the present invention;
[0025] Figure 7 This is a schematic diagram of the arrangement structure of multiple point probes provided in an embodiment of the present utility model;
[0026] The attached diagram lists the components represented by each number as follows:
[0027] 1. Beam splitting module; 2. Calibration module; 21. Point probe; 211. Fiber optic sheath; 22. Position adjustment mechanism; 221. First adjustment block; 2211. First positioning pin; 2212. First sliding hole; 2213. First through hole; 222. Second adjustment block; 2221. Y-guide rail; 2222. Second positioning pin; 2223. Second sliding hole; 2224. Second through hole; 23. Fixing base; 3. Detection module; 4. Screen under test; a1. Incident light path; a2. Transmitted light path; a3. Reflected light path; b1. Origin; b2. First offset point; b3. Second offset point. Detailed Implementation
[0028] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings, which illustrate embodiments of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this application will be thorough and complete.
[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.
[0030] It is understood that spatial relation terms such as "below," "under," "below," "below," "above," "over," etc., can be used here to describe the relationship between one element or feature shown in the figure and other elements or features. It should be understood that, in addition to the orientation shown in the figure, spatial relation terms also include different orientations of the device in use and operation. For example, if the device in the figure is flipped, the element or feature described as "below" or "under" or "below" of other elements or features will be oriented "over" of other elements or features. Therefore, the exemplary terms "below" and "under" can include both upper and lower orientations. Furthermore, the device may also include other orientations (e.g., rotated 90 degrees or other orientations), and the spatial descriptive terms used herein will be interpreted accordingly.
[0031] It should be noted that when one element is considered to be "connected" to another element, it can be directly connected to the other element or connected to the other element through an intermediary element. In the following embodiments, "connection" should be understood as "electrical connection," "communication connection," etc., if the connected circuits, modules, units, etc., have the transmission of electrical signals or data between them.
[0032] When used herein, the singular forms of “a,” “an,” and “the” may also include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms “comprising,” “including,” or “having,” etc., specify the presence of the stated feature, whole, step, operation, component, part, or combination thereof, but do not preclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof.
[0033] Figure 1 illustrates the structure and optical path principle of an existing self-calibrating colorimeter. Figure 1(a) shows a schematic diagram of the existing self-calibrating colorimeter structure. The detection module 3 performs colorimetric detection on the screen 4 under test. Then, during a preset time period or when other calibration conditions are met, the point probe 21 acquires the light signal from the screen 4 under test. After system calculation, the detection module 3 is calibrated. The optical path principle of the self-calibrating colorimeter is shown in Figure 1(b). The beam splitting module 1 can be a semi-transparent, semi-reflective mirror. The light emitted from the screen 4 under test enters the beam splitting module 1 through the incident light path a1. The beam splitting module 1 divides the light into two outputs. One output (the first ray) serves as the detection light, traveling along the transmission light path a2 to the detection module 3; the other output (the second ray) serves as the calibration light, traveling along the reflection light path a3 to the point probe 21.
[0034] However, because the calibration position of existing imaging colorimeters is fixed at the center point (e.g., Figure 2 The origin (b1) shown cannot be adjusted, which may cause the calibration point to be outside the detection area of the colorimeter, resulting in decreased measurement accuracy and poor repeatability. Furthermore, single-point calibration has limited coverage and cannot cover the entire detection area, leading to inaccurate measurement results at the edges.
[0035] Based on the above situation, this embodiment provides the following: Figure 2 The illustrated self-calibrating colorimeter device with adjustable calibration position includes a spectrophotometer module 1, a calibration module 2, and a detection module 3. The spectrophotometer module 1 is used to input the light to be measured, transmit a first ray to the detection module (3), and reflect a second ray to the calibration module (2). In this embodiment, the calibration module 2 includes a point probe 21 and a position adjustment mechanism 22. The point probe 21 is mounted on the position adjustment mechanism 22. When the position adjustment mechanism 22 is in operation, the position of the point probe 21 relative to the spectrophotometer module 1 changes.
[0036] The device provided in this embodiment can drive the point probe 21 to move via the position adjustment mechanism 22. For example, first, the origin b1 is calibrated, then the position of the point probe 21 is adjusted to calibrate the first offset point b2, and then the position of the point probe 21 is adjusted again to calibrate the second offset point b3. By moving the point probe 21, multi-point calibration of the screen 4 under test is achieved, improving the accuracy and reliability of the self-calibrating colorimeter measurement.
[0037] In one possible embodiment, Figure 2 A schematic diagram showing the cooperation between the position adjustment mechanism 22 and the point probe 21 is shown. Figure 3 Further demonstrated in Figure 2 The top structure of the position adjustment mechanism 22 under the overall layout. Figure 4 It shows in Figure 2The bottom structure of the position adjustment mechanism 22 under different viewing angles. Combined with... Figures 2-4 As shown, the position adjustment mechanism 22 includes a first adjustment block 221 and a second adjustment block 222. The point probe 21 is fixedly installed on the first adjustment block 221 by a mounting component (e.g., a fixing base 23). The first adjustment block 221 and the second adjustment block 222 are slidably connected. The first adjustment block 221 can slide relative to the second adjustment block 222 in the Y direction. The second adjustment block 222 is slidably connected to the fixing component of the device, and the second adjustment block 222 can slide in the X direction. The X direction and the Y direction are coplanar and not parallel to each other.
[0038] It is understood that the point probe 21 is mounted on the first adjusting block 221 and the second adjusting block 222, and the first adjusting block 221 and the second adjusting block 222 can flexibly move within the plane formed by the X and Y directions, thereby allowing the point probe 21 to adjust its position in a two-dimensional plane, realizing multi-point calibration of the self-calibrating colorimeter and improving the detection accuracy of the device. As a preferred embodiment, the X and Y directions are perpendicular to each other.
[0039] In one possible embodiment, the first adjusting block 221 is provided with a first sliding hole 2212 arranged along the Y direction, and the first sliding hole 2212 is slidably connected to the second adjusting block 222 by a bolt. The second adjusting block 222 is provided with a second sliding hole 2223 arranged along the X direction, and the second sliding hole 2223 is slidably connected to the fixing member of the device by a bolt. The first sliding hole 2212 and the second sliding hole 2223 are preferably set as oblong or rectangular holes. The cooperation between the first sliding hole 2212 and the bolt, and the cooperation between the second sliding hole 2223 and the bolt, not only provide a connection method, but also allow the connecting parts to slide relative to each other along the edge of the sliding hole.
[0040] As a preferred embodiment, the first adjusting block 221 is provided with a plurality of first sliding holes 2212, and the second adjusting block 222 is provided with a plurality of second sliding holes 2223. All the first sliding holes 2212 are arranged along the Y-direction, and all the second sliding holes 2223 are arranged along the X-direction. The multiple sliding holes on the same adjusting block are arranged parallel to each other. Through multi-point coordination, the sliding path of the adjusting block can be limited, preventing deflection during movement and ensuring the accuracy of position control.
[0041] In one possible embodiment, such as Figure 5The bottom view of the first adjusting block 221 is shown. The first adjusting block 221 is equipped with a first positioning pin 2211, and the second adjusting block 222 is equipped with a Y-guide rail 2221. The Y-guide rail 2221 can be a groove or a sliding hole. The first positioning pin 2211 extends into the Y-guide rail 2221 and slides in engagement with it. Based on the sliding connection between the first sliding hole 2212 and the bolt, the first adjusting block 221 is further guided by the guiding action of the first positioning pin 2211 and the Y-guide rail 2221, restricting its sliding only to the Y direction. Preferably, multiple sets of guiding structures with the first positioning pin 2211 engaging with the Y-guide rail 2221 are provided to improve the reliability of the Y-direction guidance.
[0042] In one possible embodiment, combining Figure 6 The top surface structure diagram of the second adjusting block 222 shown and Figure 4 The schematic diagram of the bottom structure of the position adjustment mechanism 22 shown indicates that the second adjustment block 222 is provided with a second positioning pin 2222, and the fixing component of the device is provided with an X-axis guide rail (not shown in the figure). The second positioning pin 2222 slides with the X-axis guide rail. It can be understood that the X-axis guide rail can be a groove or a sliding hole, and the fixing component of the device can be the housing of a self-calibrating colorimeter, or a support structure provided inside its housing.
[0043] Similar to the Y-direction guiding principle in the previous embodiment, this embodiment further guides the second adjusting block 222 through the guiding action of the second positioning pin 2222 and the X-direction guide rail, restricting it to slide only in the X-direction. Preferably, multiple sets of guiding structures with the second positioning pin 2222 cooperating with the X-direction guide rail are provided to improve the reliability of the X-direction guidance.
[0044] In one possible embodiment, the position adjustment mechanism 22 further includes an X-axis drive module (not shown in the figure) and a Y-axis drive module (not shown in the figure). The X-axis drive module is driven to the second adjustment block 222 and is used to drive the second adjustment block 222 to move along the X-axis. The Y-axis drive module is driven to the first adjustment block 221 and is used to drive the first adjustment block 221 to move along the Y-axis.
[0045] It is understood that the position adjustment mechanism 22 can be manually adjusted to adjust the position of the point probe 21, or it can be automatically adjusted using the X-axis drive module and Y-axis drive module in this embodiment. The X-axis drive module and Y-axis drive module can be implemented using a motor, hydraulic cylinder, or pneumatic cylinder, and their driving method can be gear transmission, gear-tooth plate transmission, etc. For example, the X-axis drive module uses a servo motor, and the second adjustment block 222 is provided with transmission teeth. The servo motor drives the transmission teeth to move linearly, thereby controlling the second adjustment block 222 to move along the X-axis. The operation of the Y-axis drive module is similar and will not be described in detail here.
[0046] In one possible embodiment, such as Figures 4-6 As shown, the first adjustment block 221 is provided with a first through hole 2213, the size of the first through hole 2213 is not less than the path dimension of the detection light of the point probe 21; the second adjustment block 222 is provided with a second through hole 2224, the size of the second through hole 2224 is not less than the range of the first adjustment block 221 sliding along the Y direction; the second light for calibration output by the beam splitting module 1 passes through the second through hole 2224 and the first through hole 2213 in sequence and then reaches the point probe 21.
[0047] It is understandable that in some implementation scenarios, the second light beam output by the beam splitter 1 may directly reach the point detector 21 without passing through the through holes on the first adjustment block 221 and the second adjustment block 222. In this implementation, the position adjustment mechanism 22 and the reflected light path a3 do not interfere with each other. In this embodiment, by setting the first through hole 2213 and the second through hole 2224, the path of the light used for calibration passes through the first adjustment block 221 and the second adjustment block 222, avoiding the influence of the thickness of the first adjustment block 221 and the second adjustment block 222 on the overall size of the device, reducing the overall size of the device, and facilitating the miniaturization of the equipment.
[0048] In one possible embodiment, such as Figure 3 As shown, the point probe 21 is provided with an optical fiber sheath 211 and a fixing base 23. The optical fiber sheath 211 is sleeved on the outer periphery of the point probe 21. The point probe 21 and the optical fiber sheath 211 are connected to the first adjusting block 221 through the fixing base 23.
[0049] The mounting base 23 effectively fixes the point probe 21 onto the position adjustment mechanism 22 at a preset angle. The fiber optic sheath 211 and the mounting base 23 work together to reduce damage to the fiber optic cable caused by bending of the point probe 21, and also to prevent the angle of the fiber optic cable and the light from the point probe 21 from shifting, thus ensuring the effective acquisition and transmission of calibration light.
[0050] In one possible embodiment, such as Figure 7 As shown (position adjustment mechanism 22 is not shown in the figure), the calibration module 2 includes multiple point probes 21, for example, in Figure 7 Point probes 21 are respectively installed at the origin b1, the first offset point b2, and the second offset point b3. Multiple point probes 21 are mounted on the mounting base 23 and aligned with the calibration light output surface of the beam splitter module 1.
[0051] Multiple point probes 21 can be centrally installed on the same position adjustment mechanism 22, or they can be distributed and installed on multiple position adjustment mechanisms 22. Multiple point probes 21 can work simultaneously to improve the efficiency of multi-point calibration.
[0052] This utility model provides a self-calibrating colorimeter device with adjustable calibration position. The calibration point position on the screen 4 or other object being measured can be moved, and the calibration measurement coverage is large. By performing multi-point calibration, the differences in various regions caused by spatial non-uniformity can be corrected, thereby improving the overall measurement accuracy of the self-calibrating colorimeter and thus improving measurement accuracy. It can also perform multi-point measurements simultaneously through multiple point probes 21, thereby improving calibration measurement efficiency.
[0053] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A self-calibrating colorimeter device with adjustable calibration position, comprising a spectrophotometer module (1), a calibration module (2), and a detection module (3), wherein the spectrophotometer module (1) transmits a first ray to the detection module (3) and reflects a second ray to the calibration module (2), characterized in that, The calibration module (2) includes a point probe (21) and a position adjustment mechanism (22), wherein the point probe (21) is mounted on the position adjustment mechanism (22).
2. The self-calibrating colorimeter device with adjustable calibration position according to claim 1, characterized in that, The position adjustment mechanism (22) includes a first adjustment block (221) and a second adjustment block (222). The point probe (21) is fixedly installed on the first adjustment block (221). The first adjustment block (221) and the second adjustment block (222) are slidably connected. The first adjustment block (221) can slide relative to the second adjustment block (222) in the Y direction. The second adjustment block (222) is slidably connected to the fixing member of the device, and the second adjustment block (222) can slide in the X direction. The X direction and the Y direction are not parallel to each other.
3. The self-calibrating colorimeter device with adjustable calibration position according to claim 2, characterized in that, The first adjusting block (221) is provided with a first sliding hole (2212) arranged along the Y direction, and the first sliding hole (2212) is slidably connected to the second adjusting block (222) by bolts; the second adjusting block (222) is provided with a second sliding hole (2223) arranged along the X direction, and the second sliding hole (2223) is slidably connected to the fixing part of the device by bolts.
4. The self-calibrating colorimeter device with adjustable calibration position according to claim 3, characterized in that, The first adjusting block (221) is provided with a plurality of first sliding holes (2212), and the second adjusting block (222) is provided with a plurality of second sliding holes (2223).
5. A self-calibrating colorimeter device with adjustable calibration position according to claim 2, characterized in that, The first adjusting block (221) is provided with a first positioning pin (2211), and the second adjusting block (222) is provided with a Y guide rail (2221). The first positioning pin (2211) and the Y guide rail (2221) are in sliding cooperation.
6. The self-calibrating colorimeter device with adjustable calibration position according to claim 2, characterized in that, The second adjusting block (222) is provided with a second positioning pin (2222), and the fixing part of the device is provided with an X-guide rail. The second positioning pin (2222) slides with the X-guide rail.
7. A self-calibrating colorimeter device with adjustable calibration position according to claim 2, characterized in that, The position adjustment mechanism (22) further includes an X-axis drive module and a Y-axis drive module. The X-axis drive module is connected to the second adjustment block (222) and is used to drive the second adjustment block (222) to move along the X-axis. The Y-axis drive module is connected to the first adjustment block (221) and is used to drive the first adjustment block (221) to move along the Y-axis.
8. A self-calibrating colorimeter device with adjustable calibration position according to claim 2, characterized in that, The first adjustment block (221) is provided with a first through hole (2213), the size of the first through hole (2213) is not less than the path dimension of the detection light of the point probe (21); the second adjustment block (222) is provided with a second through hole (2224), the size of the second through hole (2224) is not less than the range of the first adjustment block (221) sliding along the Y direction; the second light beam passes through the second through hole (2224) and the first through hole (2213) in sequence and then reaches the point probe (21).
9. A self-calibrating colorimeter device with adjustable calibration position according to claim 3, characterized in that, The point probe (21) is provided with an optical fiber sheath (211) and a fixing base (23). The optical fiber sheath (211) is fitted around the outer periphery of the point probe (21). The point probe (21) and the optical fiber sheath (211) are connected to the first adjusting block (221) through the fixing base (23).
10. A self-calibrating colorimeter device with adjustable calibration position according to claim 1, characterized in that, The calibration module (2) includes multiple point probes (21), which are mounted on the position adjustment mechanism (22) and aligned with the beam splitter (1).