Color temperature testing system

Abstract

The utility model relates to the technical field of optical testing, and discloses a color temperature testing system which comprises a display end, an LED analyzer, a plurality of probes, a light source and an auxiliary tool. The auxiliary tool comprises a mounting base, a pressing plate mounted on the mounting base and a driving device fixed to the mounting base and in transmission connection with the pressing plate, the light source is located on the mounting base, the probe is fixed to the pressing plate and right faces the light source, and the driving device can drive the pressing plate to drive the probe to move in the direction close to or away from the light source. When the probe moves to be tightly attached to the to-be-detected plate above the light source, the LED analyzer can detect the color temperature after the light source penetrates through the to-be-detected plate. The color temperature testing system provided by the utility model can test the color temperature of the light-transmitting plate after light transmission, is high in testing precision, and can effectively improve the quality control quality and efficiency of the light-transmitting plate.

Description

TECHNICAL FIELD

[0001] The utility model relates to optical testing technical field, concretely relates to a color temperature test system. BACKGROUND

[0002] At present, the lampshade and the backlight display of the lamp industry mainly adopt light-transmitting high molecular materials, such as PP (Polypropylene), ABS (Acrylonitrile Butadiene Styrene), PMMA (Polymethylmethacrylat) and PC (Polycarbonate). During production, the high molecular material is usually injection molded into a sample plate, and the sample plate is detected before production. At present, the LAB value of the sample plate is detected in the reflection mode, that is, the light source is irradiated on the surface of the sample plate, and the LAB value of the reflected light is detected. The detection method has poor sensitivity and cannot reflect whether the thickness of the material is uniform and whether the internal filler of the material is uniform, so the sample plate cannot be effectively controlled.

[0003] The sample plate can be tested by using a spectrometer and other equipment, but the cost of the spectrometer equipment is high, and the light source of the spectrometer is fixed and not suitable for the quality control of the high molecular material sample plate.

[0004] Therefore, it is urgent to develop a high molecular material detection device that can reflect whether the thickness of the high molecular material is uniform, whether the internal filler of the material is uniform and has low cost, so as to improve the quality and efficiency of the high molecular material quality control. UTILITY MODEL CONTENT

[0005] The utility model embodiment aims at providing a color temperature test system, which can test the color temperature of light-transmitting plate material after light transmission, has high test precision and can effectively improve the quality and efficiency of the light-transmitting plate material quality control.

[0006] To achieve the above purpose, the utility model adopts the following technical scheme:

[0007] A color temperature test system is provided, which comprises a display end, an LED analyzer, a plurality of probes, a light source and auxiliary tooling.

[0008] The display end is connected with the LED analyzer, the LED analyzer is connected with the probe through an optical fiber, the auxiliary tooling includes a mounting seat, a pressing plate mounted on the mounting seat, and a driving device fixed to the mounting seat and in transmission connection with the pressing plate, the light source is located on the mounting seat, the probe is fixed to the pressing plate and faces the light source, and the driving device can drive the pressing plate to move the probe towards the light source or away from the light source; when the probe moves to the position closely above the light source, the LED analyzer can detect the color temperature of the light source after passing through the to-be-detected plate.

[0009] As a further scheme of the color temperature test system, the pressing plate is provided with a plurality of fixing holes penetrating in the vertical direction, the fixing holes correspond to the probes one by one, the probes are mounted in the fixing holes, the bottom of the pressing plate is fixed with a light-tight soft pad, the light-tight soft pad is provided with a plurality of first avoiding holes corresponding to the probes one by one along the thickness direction of the light-tight soft pad, and the detection end of the probe passes through the first avoiding hole and is flush with the lower surface of the light-tight soft pad.

[0010] As a further scheme of the color temperature test system, the auxiliary tooling further includes a plurality of sleeves, the sleeves correspond to the fixing holes one by one, the sleeves are fixed to the upper surface of the pressing plate, the center line of the inner hole of the sleeve coincides with the center line of the fixing hole, and the probe is fixed in the inner hole of the sleeve through a fastener and extends out of the fixing hole to be flush with the lower surface of the light-tight soft pad.

[0011] As a further scheme of the color temperature test system, the auxiliary tooling further includes a first intermediate connecting piece, the first intermediate connecting piece includes a connecting plate, a plurality of first guide rods, and a plurality of springs, the connecting plate is located above the pressing plate and the sleeves, a plurality of first guide holes are formed in the connecting plate, the first guide holes correspond to the first guide rods one by one, the first guide rods are in plug-in cooperation with the first guide holes, the first guide rods and the first guide holes have a gap therebetween, the lower end of the first guide rod is fixedly connected with the pressing plate, the connecting plate is connected with the driving device, the connecting plate is provided with a plurality of second avoiding holes penetrating in the vertical direction, the second avoiding holes and the springs correspond to the sleeves one by one, one end of the spring is inserted into the sleeve, and the other end is connected with the bottom of the connecting plate, the driving device is connected with the connecting plate, and the driving device can drive the connecting plate to move up and down.

[0012] As a further scheme of the color temperature test system, the bottom of the connecting plate is provided with a plurality of first limiting grooves, the first limiting grooves correspond to the second avoiding holes one by one, the center line of the second avoiding hole coincides with the first limiting groove and penetrates the groove bottom of the first limiting groove, and the upper end of the spring is inserted into the first limiting groove and abuts against the groove bottom of the first limiting groove.

[0013] As a further scheme of the color temperature test system, the upper end of the first guide rod is provided with a limiting block, the outer circumferential surface of the limiting block protrudes from the outer circumferential surface of the first guide rod, the upper surface of the connecting plate is provided with a plurality of third limiting grooves, the limiting block is matched with the third limiting grooves one by one, and the first guide hole penetrates the groove bottom of the third limiting groove in the vertical direction.

[0014] As a further scheme of the color temperature test system, the auxiliary tool further comprises an optical fiber insertion plate, and the optical fiber insertion plate is fixed to the connecting plate adjacent to the second avoiding hole.

[0015] As a further scheme of the color temperature test system, the auxiliary tool further comprises a second intermediate connecting piece, the second intermediate connecting piece comprises a door-shaped frame and a plurality of second guide rods, the door-shaped frame is fixed to the mounting seat, a plurality of second guide holes are provided in the horizontal beam of the door-shaped frame in the vertical direction, the driving device is installed on the horizontal beam and connected with the connecting plate, the lower end of the second guide rod is connected with the connecting plate, the upper end of the second guide rod is inserted and matched with the second guide hole, and the driving device can drive the connecting plate to move the second guide rod up and down along the second guide hole.

[0016] As a further scheme of the color temperature test system, the driving device comprises a cylinder body installed on the horizontal beam and a piston rod connected with the cylinder body through a through hole on the horizontal beam, and one end of the piston rod away from the cylinder body is fixedly connected with the connecting plate.

[0017] As a further scheme of the color temperature test system, the upper surface of the mounting seat is provided with a mounting groove, the light source is installed in the mounting groove, and the upper surface of the light source is not higher than the upper surface of the mounting seat.

[0018] Beneficial effects:

[0019] The utility model discloses a color temperature test system, which comprises a light source, a probe, a connecting plate, a sleeve, a driving device and a display terminal.

[0020] The utility model discloses a color temperature test system, which comprises a light source, a probe, a connecting plate, a sleeve, a driving device and a display terminal.

[0021] The utility model discloses a color temperature test system, which comprises a light source, a probe, a connecting plate, a sleeve, a driving device and a display terminal.

[0022] The utility model discloses a color temperature test system, which comprises a light source, a probe, a connecting plate, a sleeve, a driving device and a display terminal. BRIEF DESCRIPTION OF DRAWINGS

[0023] The utility model discloses a color temperature test system, which comprises a light source, a probe, a connecting plate, a sleeve, a driving device and a display terminal.

[0024] Figure 1 The utility model discloses a color temperature test system, which comprises a light source, a probe, a connecting plate, a sleeve, a driving device and a display terminal.

[0025] Figure 2 The utility model discloses a color temperature test system, which comprises a light source, a probe, a connecting plate, a sleeve, a driving device and a display terminal.

[0026] Figure 3 The utility model discloses a color temperature test system, which comprises a light source, a probe, a connecting plate, a sleeve, a driving device and a display terminal.

[0027] Figure 4 The utility model discloses a color temperature test system, which comprises a light source, a probe, a connecting plate, a sleeve, a driving device and a display terminal.

[0028] Figure 5The structure schematic diagram under the first visual angle after the assembly of the pressing plate, the light-proof soft pad, the first guide rod, the connecting plate and the limiting block.

[0029] Figure 6 The structure schematic diagram under the second visual angle after the assembly of the pressing plate, the light-proof soft pad, the first guide rod, the connecting plate and the limiting block.

[0030] Figure 7 The side view schematic diagram after the assembly of the driving device (not containing the cylinder body) and the connecting plate.

[0031] Figure 8 The color coordinate diagram converted from the LAB value of the PC plate with different thicknesses measured under the reflection mode.

[0032] Figure 9 The color coordinate diagram of the PC plate with different thicknesses measured under the light transmission mode.

[0033] Figure 10 The color coordinate diagram of the PC plate with different test points (containing a product control line).

[0034] Figures 1-7 In the middle:

[0035] 1, LED analyzer; 2, probe; 3, light source; 4, optical fiber; 5, auxiliary tooling; 51, mounting seat; 511, mounting groove; 52, pressing plate; 521, fixing hole; 53, driving device; 531, cylinder body; 532, piston rod; 533, rod sleeve; 534, limiting ring; 54, light-proof soft pad; 541, first avoiding hole; 55, sleeve; 551, inner hole; 552, second limiting groove; 56, first intermediate connecting piece; 561, connecting plate; 5611, first guide hole; 5612, second avoiding hole; 5613, first limiting groove; 5614, third limiting groove; 562, first guide rod; 563, spring; 564, limiting block; 57, optical fiber insertion plate; 571, insertion hole; 58, second intermediate connecting piece; 581, door-shaped frame; 5811, cross beam; 5812, support plate; 582, second guide rod; 583, guide cylinder. DETAILED DESCRIPTION

[0036] In order to make the technical problems solved by the utility model, the technical scheme adopted and the technical effects reached more clear, the technical scheme of the embodiments of the utility model will be further described in detail below with reference to the drawings. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor belong to the protection scope of the utility model.

[0037] As Figures 1 to 3 shown, the embodiment provides a color temperature testing system, which comprises a display end, an LED analyzer 1, a plurality of probes 2 and a light source 3, the display end is connected with the LED analyzer 1, the LED analyzer 1 is connected with the probes 2 through optical fibers 4, and the color temperature testing system further comprises an auxiliary tool 5, the auxiliary tool 5 comprises a mounting seat 51, a pressing plate 52 mounted on the mounting seat 51 and a driving device 53 fixed on the mounting seat 51 and in transmission connection with the pressing plate 52, the light source 3 is located on the mounting seat 51, the probes 2 are mounted on the pressing plate 52 and face the light source 3, and the driving device 53 can drive the pressing plate 52 to move the probes 2 towards the direction of approaching or moving away from the light source 3, when the probes 2 move to the position of closely adhering to the to-be-detected plate above the light source 3, the color temperature of the light source after transmitting through the to-be-detected plate can be detected by the LED analyzer 1.

[0038] In the embodiment, the probes 2 are spaced apart from the light source 3 by a certain distance in the initial state, after the to-be-detected plate is placed on the light source 3, the driving device 53 of the auxiliary tool 5 drives the pressing plate 52 to move the probes 2 to closely adhere to the to-be-detected plate, after the light source 3 is turned on, the color temperature of the light source transmitting through the to-be-detected plate captured by the probes 2 can be detected by the LED analyzer 1, the color coordinates can be obtained by the LED analysis software on the display end, and the CIE color coordinate diagram is formed, and the x and y color coordinates corresponding to each test point are embodied by the CIE color coordinate diagram. Compared with the traditional detection of LAB value based on the light reflection principle of the surface of the to-be-detected plate, the color temperature testing system of the embodiment can better reflect the real transmittance and optical density of the LED light transmitting through the to-be-detected plate, and the test precision of the color temperature testing system of the embodiment is higher.

[0039] In the embodiment, the light signals collected by the probes 2 are transmitted to the LED analyzer 1 through the optical fibers 4, the LED analyzer 1 converts the light signals, analyzes the color coordinates and the color temperature through the LED analysis software installed on the display end, and displays the color coordinates and the color temperature on the display end. Therefore, the color temperature testing system of the embodiment can realize the visualization of the color coordinates.

[0040] The number of the probes 2 is not limited in the embodiment and can be set according to the actual situation, the light source 3 can be various common light sources, preferably an LED light source, and the number of the probes 2 can be the same as or different from the number of the LED lamp beads on the light source 3. Specifically, the number of the probes 2 is four, and the number of the LED lamp beads on the light source 3 is also four, which are white light, red light, blue light and green light respectively, the four probes 2 and the four LED lamp beads on the light source 3 correspond to each other, and the color temperature of different color light sources can be obtained as needed.

[0041] Further, as Figure 4 and Figure 5As shown, the pressing plate 52 is provided with a plurality of fixing holes 521 in the vertical direction, the fixing holes 521 correspond to the probes 2 one by one, and the bottom of the pressing plate 52 is fixed with an opaque soft pad 54, the opaque soft pad 54 is provided with a plurality of first avoiding holes 541 corresponding to the probes 2 one by one along the thickness direction of the opaque soft pad 54, the detection end of the probe 2 passes through the fixing hole 521 and the first avoiding hole 541 and is flush with the lower surface of the opaque soft pad 54.

[0042] In this embodiment, the opaque soft pad 54 is arranged at the lower end of the pressing plate 52, which can prevent the detection end of the probe 2 from being scratched by the hard plate to be measured when the probe 2 contacts the plate to be measured, thereby protecting the probe 2, and the opaque soft pad 54 can block the influence of other ambient light and stray light, thereby improving the color temperature test accuracy.

[0043] Further, the auxiliary tool 5 further comprises a plurality of sleeves 55, the sleeves 55 correspond to the fixing holes 521 one by one, the sleeves 55 are fixed to the upper surface of the pressing plate 52, the center line of the inner hole 551 of the sleeve 55 coincides with the center line of the fixing hole 521, the probe 2 is fixed in the inner hole 551 of the sleeve 55 through a fastener, and the detection end of the probe 2 passes through the fixing hole 521 and the first avoiding hole 541 and is flush with the lower surface of the opaque soft pad 54.

[0044] Specifically, the outer periphery of the sleeve 55 is provided with a threaded hole extending to the inner hole 551, and a screw can be screwed into the threaded hole and abut against the outer periphery of the probe 2, so as to fix the probe 2 in the sleeve 55, and when it is necessary to adjust the height of the probe 2, the screw can be loosened. The sleeve 55 in this embodiment can protect the probe 2.

[0045] Further, the auxiliary tool 5 further comprises a first intermediate connecting piece 56, the first intermediate connecting piece 56 comprises a connecting plate 561, a plurality of first guide rods 562 and a plurality of springs 563, the connecting plate 561 is located above the pressing plate 52 and the sleeve 55, the connecting plate 561 is provided with a plurality of first guide holes 5611, the first guide holes 5611 correspond to the first guide rods 562 one by one, the first guide rods 562 are inserted and matched with the first guide holes 5611, the first guide rods 562 and the first guide holes 5611 have a gap therebetween, the lower end of the first guide rod 562 is fixedly connected with the pressing plate 52, the connecting plate 561 is connected with the driving device 53, the connecting plate 561 is provided with a plurality of second avoiding holes 5612 in the vertical direction, the second avoiding holes 5612 and the springs 563 correspond to the sleeves 55 respectively, one end of the spring 563 is inserted into the sleeve 55, and the other end abuts against the bottom of the connecting plate 561, the driving device 53 is connected with the connecting plate 561, the driving device 53 can drive the connecting plate 561 to move up and down, and the optical fiber 4 is connected with the probe 2 in the sleeve 55 through the second avoiding holes 5612 and the springs 563 in the vertical direction.

[0046] The number of the first guide rods 562 is not limited in the embodiment, and can be set according to actual conditions. For example, the number of the first guide rods 562, the first guide holes 5611 and the springs 563 is four respectively, the pressing plate 52 and the connecting plate 561 are both rectangular structures, the lower ends of the four first guide rods 562 are fixedly connected with the four corners of the pressing plate 52 respectively, the upper ends of the four first guide rods 562 pass through the first guide holes 5611, and the driving device 53 is connected with the connecting plate 561 and can drive the connecting plate 561 to move up and down under the action of the first guide rods 562. The lower end of the spring 563 is inserted into the sleeve 55, and the upper end of the spring 563 is connected with the bottom of the connecting plate 561. When the distance between the to-be-measured plate, the probe 2 and the light source 3 is small or there is no distance, that is, small-distance detection or no-distance detection is performed, the driving device 53 drives the pressing plate 52 to press down the to-be-measured plate above the light source 3, which will generate an impact force on the to-be-measured plate, the probe 2 and the light source 3. In the embodiment, the spring 563 is arranged between the sleeve 55 in which the probe 2 is installed and the connecting plate 561, when the driving device 53 drives the connecting plate 561 to press down the spring 563, the spring 563 will generate a buffering force on the sleeve 55 and the pressing plate 52 after being compressed, and the buffering force can play a buffering role after the pressing plate 52 collides with the to-be-measured plate, thereby reducing the impact force on the to-be-measured plate, the probe 2 and the light source 3, avoiding hard contact between the probe 2 and the to-be-measured plate, and protecting the to-be-measured plate, the probe 2 and the light source 3 from being damaged.

[0047] In the embodiment, the second avoiding hole 5612 is used for passing the optical fiber 4, the optical fiber 4 passes the second avoiding hole 5612 and the spring 563 to be connected with the probe 2, and then the probe 2 is fixed in the sleeve 55 through the fastener.

[0048] Optionally, the bottom of the connecting plate 561 is provided with a plurality of first limiting grooves 5613, the first limiting grooves 5613 correspond to the second avoiding holes 5612 one by one, the center line of the second avoiding hole 5612 coincides with the first limiting groove 5613 and penetrates the groove bottom of the first limiting groove 5613, and the upper end of the spring 563 is inserted into the first limiting groove 5613 and connected with the groove bottom of the first limiting groove 5613.

[0049] The first limiting groove 5613 plays a limiting role on the spring 563, preventing the spring 563 from being twisted and deformed during being pulled up or compressed, so that the optical fiber 4 is not bent too much.

[0050] The upper end of the spring 563 is connected with the groove bottom of the first limiting groove 5613, which can be direct abutment or a hook arranged on the groove bottom of the first limiting groove 5613, and the spring 563 is connected with the hook.

[0051] In addition, a second limiting groove 552 can be arranged on the inner wall of the sleeve 55 adjacent to one end of the connecting plate 561, the inner hole 551 of the sleeve 55 penetrates the second limiting groove 552, and the lower end of the spring 563 abuts against the groove bottom of the second limiting groove 552 or is connected with a hook fixed on the groove bottom of the second limiting groove 552.

[0052] Further, the upper end of the first guide rod 562 is provided with a limiting block 564, the outer circumferential surface of the limiting block 564 protrudes from the outer circumferential surface of the first guide rod 562, the upper surface of the connecting plate 561 is provided with a plurality of third limiting grooves 5614, the limiting block 564 is matched with the third limiting grooves 5614 one by one, and the first guide hole 5611 penetrates the groove bottom of the third limiting groove 5614 in the vertical direction. Specifically, the cross section of the first guide rod 562 and the limiting block 564 is in T-shaped structure, and correspondingly, the cross section of the third limiting groove 5614 and the first guide hole 5611 is also in corresponding T-shaped structure, when the connecting plate 561 is driven to rise by the driving device 53, the limiting block 564 can prevent the first guide rod 562 from separating from the connecting plate 561.

[0053] The auxiliary tool 5 further comprises a fiber insertion plate 57, the fiber insertion plate 57 is fixed on the connecting plate 561 adjacent to the second avoiding hole 5612, and the fiber insertion plate 57 is provided with insertion holes 571 for the optical fiber 4 to pass through. One end of the optical fiber 4 is connected with the probe 2 through the second avoiding hole 5612 and the spring 563, and the other end is connected with the LED analyzer 1 through the insertion hole 571, and the arrangement of the fiber insertion plate 57 can prevent the optical fiber 4 from being damaged due to too severe bending.

[0054] Specifically, the insertion hole 571 can be a long hole penetrating the fiber insertion plate 57 in the thickness direction, or can be a plurality of round holes corresponding to the number of the optical fiber 4.

[0055] The LED analyzer 1 in the embodiment is installed on the mounting seat 51 and located on the side of the fiber insertion plate 57 away from the second avoiding hole 5612, and the optical fiber 4 is directly connected with the interface on the LED analyzer 1 after passing through the insertion hole 571 on the fiber insertion plate 57.

[0056] Further, the auxiliary tool 5 further comprises a second intermediate connecting piece 58, which comprises a door-shaped frame 581 and a plurality of second guide rods 582. The door-shaped frame 581 is fixed to the mounting base 51 and comprises a crossbeam 5811 and two support plates 5812, which are fixed to the mounting base 51 at intervals and are located on both sides of the light source 3. The crossbeam 5811 is connected with one of the support plates 5812 at each end along the length direction of the crossbeam 5811. A plurality of second guide holes (not shown in the figure) are provided in the crossbeam 5811 in the vertical direction. The driving device 53 is installed on the crossbeam 5811 and connected with the connecting plate 561. The lower end of the second guide rod 582 is connected with the connecting plate 561, and the upper end of the second guide rod 582 is inserted into the second guide hole. The driving device 53 can drive the connecting plate 561 to move up and down along the second guide hole.

[0057] The second guide rod 582 is inserted into the second guide hole, which guides the driving device 53 to drive the connecting plate 561 to move up and down, so that the up and down movement of the connecting plate 561 is more stable.

[0058] Specifically, the number of the second guide rod 582 and the second guide hole is two respectively. The four second avoiding holes 5612 are evenly distributed along the length direction of the connecting plate 561 and are located between the two second guide rods 582. In order to further improve the lifting stability of the connecting plate 561, a guide cylinder 583 is installed on the crossbeam 5811 at the second guide hole. An external thread is provided on the outer periphery of the guide cylinder 583 and near the lower end of the guide cylinder 583. After the guide cylinder 583 passes through the second guide hole, the lower end of the guide cylinder 583 protrudes from the lower surface of the crossbeam 5811 and is screwed and fixed with the bolt fixed on the lower surface of the crossbeam 5811. The upper end of the guide cylinder 583 protrudes from the upper surface of the crossbeam 5811.

[0059] The driving device 53 in the embodiment can be a cylinder, as shown in Figure 1 and Figure 7 Specifically, the driving device 53 comprises a cylinder body 531 installed on the crossbeam 5811 and a piston rod 532 connected with the cylinder body 531 through the through hole in the crossbeam 5811. The end of the piston rod 532 away from the cylinder body 531 is fixedly connected with the connecting plate 561. The piston rod 532 drives the connecting plate 561 to move up and down by extending and retracting.

[0060] Further, the driving device 53 further comprises a rod sleeve 533 fixed to the bottom of the crossbeam 5811. The center line of the rod sleeve 533 coincides with the center line of the piston rod 532. The piston rod 532 is located in the rod sleeve 533. A limiting ring 534 is fixed to the bottom of the rod sleeve 533. The piston rod 532 passes through the limiting ring 534 and is connected with the connecting plate 561. The inner diameter of the limiting ring 534 is slightly larger than the diameter of the piston rod 532 and smaller than the inner diameter of the rod sleeve 533.

[0061] Specifically, the rod sleeve 533 is located between two second guide rods 582 which are centrally symmetric relative to the rod sleeve 533.

[0062] Of course, the driving device 53 of the utility model is not limited to the above-mentioned cylinder structure, and can also be a hydraulic driving structure or a lead screw motor driving structure, and details are not described again.

[0063] In the embodiment, the light source 3 is close to the to-be-tested plate for color temperature testing, and therefore, the embodiment opens a mounting groove 511 on the upper surface of the mounting seat 51, like Figure 2 and installs the light source 3 in the mounting groove 511, and the upper surface of the light source 3 is not higher than the upper surface of the mounting seat 51.

[0064] In other embodiments, the light source 3 can be arranged to be spaced apart from the to-be-tested plate, and the distance between the light source 3 and the to-be-tested plate can be designed as an adjustable structure. For example, the depth of the mounting groove 511 is increased, a hinged lifting frame is installed in the mounting groove 511, and the light source 3 is arranged on the upper end of the hinged lifting frame, and the position of the light source 3 in the height direction is adjusted by the extension and retraction of the hinged lifting frame. For another example, a plurality of spacers can be designed, a proper number of spacers are arranged in the mounting groove 511 according to the distance between the light source 3 and the to-be-tested plate, and then the to-be-tested plate is placed on the spacers.

[0065] The embodiment also provides a light-transmitting plate quality control method, which applies the color temperature testing system of the above-mentioned embodiment and includes the following steps.

[0066] A standard color temperature is provided, the standard color temperature has a floating space of-(1-3) % and (1-3) %, a color coordinate diagram with two color temperature quality control lines is obtained by using LED analysis software of a display end, and the area between the two color temperature quality control lines is a standard color temperature floating interval;

[0067] The to-be-tested plate is placed on the mounting seat 51 of the auxiliary tool 5 and covers the light source 3, and then the light source 3 is turned on, the probe 2 is driven to be close to the surface of the to-be-tested plate by the driving of the pressing plate 52, the color coordinates of the light source after transmitting through the to-be-tested plate are detected by using the LED analyzer 1, the position of the color coordinates in the color coordinate diagram is observed, if the color coordinates are located in the standard color temperature floating interval, the to-be-tested plate is qualified, and if the color coordinates exceed the standard color temperature floating interval, the to-be-tested plate is unqualified.

[0068] The unqualified reason can be that the thickness of the to-be-tested plate does not meet the requirements or the filler is not uniformly dispersed.

[0069] In the embodiment, the data (color temperature and color coordinates) detected by the LED analyzer 1 can be visualized in the color coordinates (CIE color coordinate diagram).

[0070] Take PC plates with different thicknesses as examples, the LAB values (reflection mode under white light source) of the PC plates are detected according to a conventional method, and the x and y coordinates of the white light source transmitted through the PC plates (light transmission mode) are detected according to the method of the embodiment and converted into LAB values, and the results are shown in Table 1.

[0071] Table 1. LAB values of PC plates with different thicknesses under reflection mode and light transmission mode

[0072]

[0073]

[0074] As can be seen from Table 1, the LAB values of the PC plates with different thicknesses under light transmission mode differ greatly, while the LAB values of the PC plates with different thicknesses under reflection mode differ little, indicating that the quality control method of the embodiment is more sensitive to the detection of light transmission plates.

[0075] The LAB values of each PC plate measured under reflection mode in Table 1 can be converted into XYZ color coordinates, and then into CIE (x, y) color coordinates, and a color coordinate diagram can be made (the conversion method and calculation method are conventional technical means in the field of colorimetry, and will not be described in detail), such as Figure 8 Under light transmission mode, the CIE (x, y) color coordinates and color temperature can be directly obtained by using the method of the embodiment, and a color coordinate diagram can be made, such as Figure 9 .

[0076] wherein, Figure 8 is a color coordinate diagram converted from the LAB values of the PC plates with different thicknesses measured under reflection mode, Figure 8 The gray point (next to the red point) in the color coordinate diagram is the color coordinate of the PC plates with different thicknesses, and the color coordinates of the PC plates are completely coincided, indicating that the thickness difference of the PC plates cannot be directly reflected in the color coordinate diagram under the reflection mode, i.e. the thickness difference between the PC plates cannot be detected under the reflection mode. Figure 9 The four black points in the color coordinate diagram are the color coordinates of the PC plates with different thicknesses, i.e. the four kinds of thicknesses of the PC plates correspond to four different color coordinates, indicating that whether the PC plates are qualified can be directly reflected in the color coordinate diagram by using the light transmission mode of the embodiment, and the PC plates with different thicknesses can be distinguished, indicating that the test result accuracy under the light transmission mode is higher than that under the light reflection mode.

[0077] Next, take 3900K as the standard color temperature, take 3800K and 4000K as the color temperature control lines, and obtain the standard color temperature floating interval. The LED analyzer 1 is used to detect the color temperature of the PC plate to be tested with a thickness in the interval of 1.5-2.5mm, and the test results are shown in Figure 10 .

[0078] As can be seen from Figure 10 , only part of the color coordinates of the detection points fall within the standard color temperature floating interval, indicating that the PC plate to be tested is unqualified. Part of the color coordinate points exceeds the standard color temperature floating interval and is located on the left side of the standard color temperature floating interval, and is brighter after being transparent, indicating that the region is relatively thin; part of the color coordinate points exceeds the standard color temperature floating interval and is located on the right side of the standard color temperature floating interval, and is darker after being transparent, indicating that the region is relatively thick.

[0079] Further, the embodiment can further add a 0.46>y>0.44 control line on the basis of the above embodiment. Since uneven dispersion of color powder will cause small fluctuations of color coordinate points in the x, y direction, for part of the color coordinate points far from the qualified region, it indicates that the thickness and filler dispersion are unqualified. The embodiment can further improve the control precision by adding the CIE y value control line in combination with the color temperature control line.

[0080] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should be covered in the scope of the claims and the description of the present application. Especially, as long as there is no structural conflict, each technical feature mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the claims.

Claims

1. A color temperature testing system, comprising a display terminal, an LED analyzer, a plurality of probes, and a light source, wherein the display terminal is connected to the LED analyzer, and the LED analyzer is connected to the probes via optical fiber, characterized in that, It also includes auxiliary tooling, which includes a mounting base, a pressure plate mounted on the mounting base, and a drive device fixed on the mounting base and connected to the pressure plate. The light source is located on the mounting base, and the probe is fixed on the pressure plate and faces the light source. The drive device can drive the pressure plate to move the probe toward or away from the light source. When the probe moves to the test plate that is close to the light source, the LED analyzer can detect the color temperature of the light source after it passes through the test plate.

2. The color temperature testing system according to claim 1, characterized in that, The pressure plate has several fixing holes running vertically through it, and each fixing hole corresponds to a probe. An opaque soft pad is fixed to the bottom of the pressure plate. The opaque soft pad has several first clearance holes along its thickness direction, each corresponding to a probe. The probe's detection end passes through the fixing holes and the first clearance holes and is flush with the lower surface of the opaque soft pad.

3. The color temperature testing system according to claim 2, characterized in that, The auxiliary tooling also includes several sleeves, each corresponding to a fixed hole. The sleeves are fixed to the upper surface of the pressure plate, and the center line of the inner hole of the sleeve coincides with the center line of the fixed hole. The probe is fixed in the inner hole of the sleeve by fasteners, and the probe end passes through the fixed hole and the first clearance hole and is flush with the lower surface of the opaque pad.

4. The color temperature testing system according to claim 3, characterized in that, The auxiliary tooling also includes a first intermediate connector, which includes a connecting plate, a plurality of first guide rods, and a plurality of springs. The connecting plate is located above the pressure plate and the sleeve. The connecting plate has a plurality of first guide holes, each corresponding to a first guide rod. The first guide rods are inserted into the first guide holes with a gap between them. The lower ends of the first guide rods are fixedly connected to the pressure plate. The connecting plate is connected to the driving device. The connecting plate has a plurality of second clearance holes extending vertically through it. The second clearance holes and the springs correspond to the sleeves one by one. One end of the spring is inserted into the sleeve, and the other end is connected to the bottom of the connecting plate. The driving device is connected to the connecting plate and can drive the connecting plate to move up and down. The optical fiber passes vertically through the second clearance holes and the springs and connects to the probe inside the sleeve.

5. The color temperature testing system according to claim 4, characterized in that, The bottom of the connecting plate is provided with a plurality of first limiting grooves, each of which corresponds to a second clearance hole. The second clearance hole and the center line of the first limiting groove are aligned and pass through the bottom of the first limiting groove. The upper end of the spring is inserted into the first limiting groove and abuts against the bottom of the first limiting groove.

6. The color temperature testing system according to claim 4, characterized in that, The upper end of the first guide rod is provided with a limiting block, the outer peripheral surface of the limiting block protrudes from the outer peripheral surface of the first guide rod, and the upper surface of the connecting plate is provided with a plurality of third limiting grooves, the limiting block and the third limiting grooves are matched one by one, and the first guide hole penetrates the bottom of the third limiting groove in the vertical direction.

7. The color temperature testing system according to claim 4, characterized in that, The auxiliary tooling also includes an optical fiber insertion plate, which is fixed to the connecting plate adjacent to the second clearance hole, and the optical fiber insertion plate has insertion holes for optical fibers to pass through.

8. The color temperature testing system according to claim 4, characterized in that, The auxiliary tooling also includes a second intermediate connecting member, which includes a portal frame and a plurality of second guide rods. The portal frame is fixed on the mounting base. The crossbeam of the portal frame is provided with a plurality of second guide holes in the vertical direction. The driving device is installed on the crossbeam and connected to the connecting plate. The lower end of the second guide rod is connected to the connecting plate, and the upper end of the second guide rod is inserted into the second guide hole. The driving device can drive the connecting plate to move the second guide rod up and down along the second guide hole.

9. The color temperature testing system according to claim 8, characterized in that, The drive device includes a cylinder mounted on the crossbeam and a piston rod that passes through a through hole in the crossbeam and is connected to the cylinder. The end of the piston rod away from the cylinder is fixedly connected to the connecting plate.

10. The color temperature testing system according to any one of claims 1-9, characterized in that, The upper surface of the mounting base is provided with a mounting groove, the light source is installed in the mounting groove, and the upper surface of the light source is not higher than the upper surface of the mounting base.

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