A device for detecting performance of LED light guide plate

Abstract

The present invention discloses a device for detecting the performance of an LED light guide plate, and relates to the technical field of light guide plate detection. The detection device comprises a detection outer shell, an upper cover plate assembly and a detection body, and the detection body comprises a rectangular frame, a rotating plate and a mounting unit. When the two end surfaces of the rotating plate are respectively in a relative state with two detection cavities, the outer edge of the rotating plate can be in sealing contact with the inner side of the rectangular frame, and both end surfaces of the rotating plate are provided with a photosensitive detection plate and a mounting unit; and also comprises two light emitting mechanisms, and the light emitting mechanism comprises a movable shielding plate and a light source switching assembly, and a light source part is provided on the outer wall of the light source switching assembly, and the movable shielding plate is provided with a light transmission port, and the light generated by one of the light source parts passes through the light transmission port and enters the detection cavity. The present invention has a simple structure, and can adjust the color and intensity of the light source and the distance between the light guide plate and the light source in various ways, and works in a sealed cavity, and is convenient to operate and has strong practicality.

Description

Technical Field

[0001] The invention relates to the technical field of light guide plate detection, and in particular to a device for detecting performance of an LED light guide plate. Background Art

[0002] The light guide plate is made of optical grade acrylic / PC sheet, and then uses high-tech materials with extremely high refractive index and non-light absorption to print light guide points on the bottom of the optical grade acrylic sheet by laser engraving, V-shaped cross grid engraving, and UV screen printing technology. The optical grade acrylic sheet is used to absorb the light emitted from the lamp and stay on the surface of the optical grade acrylic sheet. When the light hits each light guide point, the reflected light will spread to various angles, and then destroy the reflection conditions and be emitted from the front of the light guide plate. Through various light guide points of different densities and sizes, the light guide plate can emit light evenly.

[0003] During the production process of LED light guide plates, random sampling is usually required. During the inspection, a light guide performance detection device is needed to detect the light guide performance of the LED light guide plate and whether the LED light guide plate is qualified. The existing light guide performance detection device of the LED light guide plate places the light guide plate in a dark chamber and illuminates the light guide plate with a specific light source to perform optical performance detection; however, it is not easy to switch the light source and install the light guide plate in a sealed chamber. Summary of the invention

[0004] The purpose of the present invention is to provide a device for detecting the performance of an LED light guide plate to solve the problems raised in the background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A device for detecting the performance of an LED light guide plate comprises an outer detection shell, an upper cover plate assembly and a detection body, wherein the upper side and both ends of the outer detection shell are both opened, the detection body is arranged in the middle position of the inner detection shell and the detection body divides the inner detection shell into two detection cavities, the detection body comprises a rectangular frame, a rotating plate and a mounting unit, both sides of the rectangular frame are vertically slidably matched with the inner wall of the detection shell, a central rod shaft rotatably connected thereto is arranged in the middle position of the rectangular frame and the top of the central rod shaft extends to the upper side of the rectangular frame, the rotating plate is arranged on the central rod shaft, when the two end surfaces of the rotating plate are respectively in a relative state with the two detection cavities, the outer edge of the rotating plate can be sealed and contacted with the inner edge of the rectangular frame, and the two end surfaces of the rotating plate are both provided with a photosensitive detection plate and a mounting unit, and the mounting unit is used to detachably fix the light guide plate and make the light guide The plate is located between the photosensitive detection plate and the detection cavity; the upper cover plate assembly is two and the two upper cover plate assemblies are symmetrically arranged on the top of the detection outer shell, and the two upper cover plate assemblies cooperate with each other and cover the top port of the detection outer shell; it also includes two light emitting mechanisms symmetrically arranged at the two end parts of the detection outer shell, and the light emitting mechanism includes a movable shielding plate and a light source switching assembly, the movable shielding plate is arranged in the detection cavity and the movable shielding plate can be moved in the detection cavity in a manner close to or away from the detection subject; the light source switching assembly is arranged on the side of the movable shielding plate away from the detection subject and the upper and lower ends of the light source switching assembly are rotatably connected to the movable shielding plate, a plurality of light source parts are arranged on the outer wall of the light source switching assembly and a light-transmitting port is opened in the middle part of the movable shielding plate, one of the light source parts corresponds to the light-transmitting port and the light generated by the light source part passes through the light-transmitting port into the detection cavity.

[0007] On the basis of the above technical solution, the present invention also provides the following optional technical solution:

[0008] In an optional scheme: the upper cover assembly includes an upper cover body, a handle portion and a connecting shaft portion, the connecting shaft portion is rotatably connected to the end of the detection outer shell and one side of the upper cover body is fixedly sleeved on the connecting shaft portion, the handle portion is arranged on the end face of the upper cover body, and the upper cover body is connected to the rectangular frame through at least one connecting rod; the two ends of the connecting rod are respectively hinged to the end face of the upper cover body and the side of the rectangular frame.

[0009] In an optional solution: a first sealing strip is provided on the upper edge of the detection outer shell and a second sealing strip is provided on the upper edge of the movable shielding plate. When the upper cover plate body is sealed on the top end of the detection outer shell, the first sealing strip and the second sealing strip are both in contact with the end surface of the upper cover plate body.

[0010] In an optional scheme: the installation unit includes an upper limiting frame, a lower frame body and a clamping part arranged on the lower frame body, the upper limiting frame is arranged at a position near the top of the end surface of the rotating plate and the upper limiting frame has a guide hole for the light guide plate to pass through, the lower frame body is arranged at a position near the bottom of the end surface of the rotating plate, the clamping part includes a supporting shaft body and two clamping strips, the supporting shaft body is provided with two sleeve parts rotatably connected thereto, the two clamping strips are respectively fixedly connected to the side walls of the two sleeve parts, the upper sides of the two clamping strips are folded outwards and the bottoms of the two clamping strips are respectively connected by multiple clamping springs.

[0011] In an optional solution: an upper lever is provided at the top of the central rod shaft and second accommodating tube grooves are provided at both ends of the upper lever and a second elastically retractable ball is provided at the lower end of the second accommodating tube groove, and two groove portions are provided on the upper side of the rectangular frame. When the second accommodating tube groove is rotated to the upper side of the rectangular frame, the second ball can be placed inside the groove portion.

[0012] In an optional solution: two symmetrical CCD camera units are also provided on the surface of the movable baffle plate facing the detection cavity. The CCD camera unit and the photosensitive detection plate are electrically connected to a display panel provided on the outer wall of the detection housing. The CCD camera unit is used to photograph the state of the optical performance of the detection light guide plate in the detection cavity.

[0013] In an optional scheme: the movable shielding plate is in an arc shape and upper radial frames are provided at the upper and lower ends of the movable shielding plate, the light source switching assembly includes a switching column and a rotating vertical axis portion, the two ends of the rotating vertical axis portion are respectively rotatably connected to two upper radial frames, the switching column is arranged on the rotating vertical axis portion and the outer wall of the switching column is in sliding contact with the inner arc surface of the movable shielding plate; a plurality of light source accommodating grooves for installing the light source portion are opened on the outer wall of the switching column along its axial direction.

[0014] In an optional scheme: a plurality of upper radial slots are arranged on the top of the switching cylinder, the plurality of upper radial slots correspond one-to-one to the plurality of light source accommodating slots and the ends of the upper radial slots extend to the top edges of the light source accommodating slots, and the number of the light source accommodating slots is an even number; a first storage tube slot is arranged in the middle position of the bottom of the upper cover body which is sleeved on the connecting shaft part and a retractable first ball is arranged at the bottom port of the first storage tube slot; when the upper cover body is sealed on the top of the detection outer shell, the first storage tube slot is in a vertical state and the first ball can be inserted into the upper radial slot.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. In the present invention, the light guide plate is placed in a sealed detection cavity for optical performance detection to prevent external light from affecting the light generated by the light source, thereby causing inaccurate detection results. The light source is directly irradiated onto the light guide plate through a narrow light-transmitting opening, which can reduce light dispersion.

[0017] 2. The present invention can adjust the distance between the light guide plate and the light source and switch light sources of different colors and intensities for detection, and can test the light guiding performance of the light guide plate in a diversified manner. The operation is convenient and the practicability is strong.

[0018] 3. The present invention has a simple structure, can adjust the color and intensity of the light source and the distance between the light guide plate and the light source in a variety of ways, works in a sealed cavity, is easy to operate and has strong practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 FIG. 1 is a schematic diagram of the overall structure of the detection device in one embodiment of the present invention.

[0020] Figure 2 It is a schematic diagram of the structure of a detection device in which the detection outer shell is removed in one embodiment of the present invention.

[0021] Figure 3 The figure is a schematic diagram of the structure of the detection body in one embodiment of the present invention.

[0022] Figure 4 It is a schematic diagram of the structure of the clamping part in one embodiment of the present invention.

[0023] Figure 5 FIG. 1 is a schematic diagram of the structure of a light emitting mechanism in an embodiment of the present invention.

[0024] Figure 6 It is a schematic diagram of the structure of a light source switching component in one embodiment of the present invention.

[0025] Reference numerals: detection housing 100, first sealing strip 110, display panel 120, upper cover assembly 200, upper cover body 210, handle portion 220, connecting shaft portion 230, first storage cylinder groove 240, first ball bearing 241, detection body 300, rectangular frame 310, groove portion 311, central rod shaft 320, rotating plate 330, upper limiting frame 340, photosensitive detection plate 350, clamping portion 360, support shaft body 361, sleeve portion 3 62, clamping strip 363, clamping spring 364, upper lever 370, second accommodating tube groove 380, second ball 381, lower frame 390, movable shielding plate 400, light-transmitting port 410, CCD camera unit 420, upper radial frame 430, second sealing strip 440, light source switching assembly 500, switching column 510, light source accommodating groove 520, upper radial slot 530, rotating vertical axis portion 540, connecting rod 600, light guide plate 700, light source unit 800. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments; in the drawings or descriptions, similar or identical parts use the same reference numerals, and in practical applications, the shape, thickness or height of each component can be enlarged or reduced. The various embodiments listed in the present invention are only used to illustrate the present invention and are not used to limit the scope of the present invention. Any obvious modifications or changes made to the present invention do not depart from the spirit and scope of the present invention.

[0027] In one embodiment, Figure 1-Figure 3As shown, a device for detecting performance of an LED light guide plate includes a detection outer shell 100, an upper cover plate assembly 200 and a detection body 300. The upper side and both ends of the detection outer shell 100 are both opened. The detection body 300 is arranged in the middle position inside the detection outer shell 100 and the detection body 300 divides the inside of the detection outer shell 100 into two detection cavities. The detection body 300 includes a rectangular frame 310, a rotating plate 330 and a mounting unit. Both sides of the rectangular frame 310 are vertically slidably matched with the inner wall of the detection outer shell 100. The rectangular frame 310 is provided with a central rod shaft 320 rotatably connected thereto in the middle position thereof, and the top of the central rod shaft 320 extends to the upper side of the rectangular frame 310, and the rotating plate 330 is provided on the central rod shaft 320. When the two end surfaces of the rotating plate 330 are respectively in a relative state with the two detection cavities, the outer edge of the rotating plate 330 can be in sealing contact with the inner side of the rectangular frame 310, and the two end surfaces of the rotating plate 330 are provided with a photosensitive detection plate 350 and an installation unit, and the installation unit is used to detachably fix the light guide plate 700 and make the light guide plate 700 is located between the photosensitive detection plate 350 and the detection cavity; the upper cover plate assembly 200 is two and the two upper cover plate assemblies 200 are symmetrically arranged on the top of the detection outer shell 100, and the two upper cover plate assemblies 200 cooperate with each other and cover the top port of the detection outer shell 100; it also includes two light emitting mechanisms symmetrically arranged at the two ends of the detection outer shell 100, and the light emitting mechanism includes a movable shielding plate 400 and a light source switching assembly 500, and the movable shielding plate 400 is arranged in the detection cavity and the movable shielding plate 400 can be in the detection cavity Move in a manner of approaching the detection body 300 or moving away from the detection body 300; the light source switching component 500 is arranged on the side of the movable baffle plate 400 away from the detection body 300 and the upper and lower ends of the light source switching component 500 are rotatably connected to the movable baffle plate 400, a plurality of light source parts 800 are arranged on the outer wall of the light source switching component 500 and a light-transmitting port 410 is opened in the middle part of the movable baffle plate 400, one of the light source parts 800 corresponds to the light-transmitting port 410 and the light generated by the light source part 800 passes through the light-transmitting port 410 into the detection cavity.

[0028] In the embodiment of the present invention, before starting the detection, the two light guide plates 700 are respectively installed on the two mounting units, and the end faces of the light guide plates 700 correspond to the light-transmitting openings 410 on the movable shielding plate 400; the two upper cover plate assemblies 200 cover the top ports of the detection outer shell 100, and make the two detection cavities in a closed state, the interiors of the two detection cavities are in darkness and there is no external light, and the light source part 800 corresponding to the light-transmitting opening 410 on the outer wall of the light source switching assembly 500 is turned on; the light generated by the light source part 800 passes through the light-transmitting opening 410 and directly hits the light guide plate 700, and the photosensitive detection plate 350 is used to detect the intensity of the light passing through the light guide plate 700, so as to detect the optical performance of the light guide plate 700; the rotating light source switching assembly The component 500 makes the multiple light source parts 800 on the outer wall of the light source switching component 500 correspond to the light-transmitting port 410 in turn, and the multiple light source parts 800 respectively emit light of different colors, thereby detecting the optical performance of the light guide plate 700 for light of different colors; secondly, by adjusting the positions of the movable shielding plate 400 and the light source switching component 500 relative to the detection body 300, the distance between the light source part 800 and the light guide plate 700 can be adjusted; at the same time, the top of the central rod shaft 320 is screwed and the central rod shaft 320 drives the rotating plate 330 to rotate, thereby rotating the light guide plate 700 and the photosensitive detection plate 350 into another detection cavity, so as to perform optical performance detection on the light emitted by another group of light source parts 800 on the light source switching component 500.

[0029] In one embodiment, Figure 1-Figure 3 As shown, the upper cover assembly 200 includes an upper cover body 210, a handle portion 220 and a connecting shaft portion 230, the connecting shaft portion 230 is rotatably connected to the end of the detection outer shell 100 and one side of the upper cover body 210 is fixedly sleeved on the connecting shaft portion 230, the handle portion 220 is arranged on the end surface of the upper cover body 210, and the upper cover body 210 is connected to the rectangular frame 310 through at least one connecting rod 600; the two ends of the connecting rod 600 are respectively hinged to the end surface of the upper cover body 210 and the side of the rectangular frame 310; in the embodiment of the present invention, since the rectangular frame 310 and the detection outer shell 100 is vertically slidably matched with the inner wall of the detection outer shell 100. When the detection personnel holds the handle part 220 and drives the upper cover body 210 to rotate around the center line of the connecting shaft part 230, the handle part 220 can push and pull the rectangular frame 310 through the connecting rod 600, so that the entire detection body 300 moves up or down; when the upper cover body 210 is flipped up, the detection body 300 moves upward, so as to facilitate the replacement of the light guide plate 700; when the upper cover assembly 200 is rotated downward and covers the upper end of the detection outer shell 100, the upper cover body 210 pushes the detection body 300 to move downward through the connecting rod 600 and is completely placed inside the detection outer shell 100.

[0030] In one embodiment, Figure 1 , Figure 2 , Figure 3 and Figure 5 As shown, a first sealing strip 110 is arranged on the upper edge of the detection outer shell 100 and a second sealing strip 440 is arranged on the upper edge of the movable baffle plate 400. When the upper cover plate body 210 is sealed on the top end of the detection outer shell 100, the first sealing strip 110 and the second sealing strip 440 are both in contact with the end face of the upper cover plate body 210. In the embodiment of the present invention, after the upper cover plate body 210 covers the top end of the detection outer shell 100, the first sealing strip 110 and the second sealing strip 440 are both in contact with the upper cover plate body 210, and the sealing between the upper cover plate body 210 and the upper edge of the detection outer shell 100 and the upper edge of the upper cover plate body 210 and the upper edge of the movable baffle plate 400 is improved, so as to avoid external light from entering the detection cavity through the gap between the upper cover plate body 210 and the upper edge of the detection outer shell 100 and the gap between the upper cover plate body 210 and the upper edge of the movable baffle plate 400 when detecting the optical performance of the light guide plate 700.

[0031] In one embodiment, Figure 1-Figure 4 As shown, the mounting unit includes an upper limiting frame 340, a lower frame body 390 and a clamping portion 360 arranged on the lower frame body 390, the upper limiting frame 340 is arranged at a position close to the top of the end face of the rotating plate 330 and the upper limiting frame 340 has a guide hole for the light guide plate 700 to pass through, the lower frame body 390 is arranged at a position close to the bottom of the end face of the rotating plate 330, the clamping portion 360 includes a supporting shaft body 361 and two clamping strips 363, the supporting shaft body 361 is provided with two sleeve portions 362 rotatably connected thereto, and the two clamping strips 363 are respectively connected to the upper limiting frame 340 and the lower limiting frame 340. The side walls of the two sleeve portions 362 are fixedly connected, the upper sides of the two clamping strips 363 are folded outwards and the bottoms of the two clamping strips 363 are respectively connected by a plurality of clamping springs 364; in the embodiment of the present invention, when the light guide plate 700 is installed, the light guide plate 700 passes through the guide serial port on the upper limiting frame 340 and the bottom of the light guide plate 700 is placed between the tops of the two clamping strips 363. Due to the elastic force of the clamping springs 364, the tops of the two clamping strips 363 can press the bottom of the light guide plate 700, thereby facilitating the fastening of the light guide plate 700 and ensuring its stability.

[0032] In one embodiment, Figure 1-Figure 3As shown, an upper lever 370 is provided on the top of the central rod shaft 320, and second accommodating tube grooves 380 are provided at both ends of the upper lever 370, and a second elastically retractable ball 381 is provided at the lower end of the second accommodating tube groove 380, and two groove portions 311 are provided on the upper side of the rectangular frame 310. When the second accommodating tube groove 380 is rotated to the upper side of the rectangular frame 310, the second ball 381 can be placed inside the groove portion 311; in the embodiment of the present invention, when the end face of the rotating plate 330 faces the detection cavity, the length direction of the upper lever 370 is consistent with the width direction of the rectangular frame 310; at this time, the second ball 381 is stuck in the corresponding groove portion 311; when the upper lever 370 and the central rod shaft 320 are rotated and the rotating plate 330 is rotated 180 degrees, the second ball 381 can be stuck in the other groove portion 311 and make a sound, thereby ensuring that the rotating plate 330 and the light guide plate 700 are in a relative state with the detection cavity.

[0033] In one embodiment, Figure 1 , Figure 2 and Figure 5 As shown, two symmetrical CCD camera units 420 are also provided on the surface of the movable baffle plate 400 facing the detection cavity. The CCD camera unit 420 and the photosensitive detection plate 350 are electrically connected to the display panel 120 arranged on the outer wall of the detection outer shell 100. The CCD camera unit 420 is used to photograph the state of the optical performance of the detection light guide plate 700 in the detection cavity. In the embodiment of the present invention, the light intensity detected by the photosensitive detection plate 350 passing through the light guide plate 700 and the detection state of the optical performance of the light guide plate 700 photographed by the CCD camera unit 420 are displayed by the display panel 120, so that the detection status of the optical performance of the light guide plate 700 can be observed in real time.

[0034] In one embodiment, Figure 1 , Figure 2 , Figure 5 and Figure 6As shown, the movable shielding plate 400 is in an arc shape and upper radial frames 430 are provided at the upper and lower ends of the movable shielding plate 400. The light source switching assembly 500 includes a switching cylinder 510 and a rotating vertical shaft portion 540. The two ends of the rotating vertical shaft portion 540 are respectively rotatably connected to the two upper radial frames 430. The switching cylinder 510 is arranged on the rotating vertical shaft portion 540 and the outer wall of the switching cylinder 510 is in sliding contact with the inner arc surface of the movable shielding plate 400; the outer wall of the switching cylinder 510 is opened along its axial direction. A plurality of light source accommodating grooves 520 for installing the light source unit 800 are provided; in an embodiment of the present invention, the movable shielding plate 400 closes the end port of the detection outer shell 100 and the switching column 510 can block the light-transmitting port 410 on the movable shielding plate 400. When the light source accommodating groove 520 is rotated to a position relative to the light-transmitting port 410, the light emitted by the light source unit 800 passes through the light-transmitting port 410 and enters the detection cavity, and then the light source unit 800 used for detection can be quickly switched by rotating the switching column 510.

[0035] In one embodiment, Figure 1 , Figure 2 , Figure 5 and Figure 6 As shown, the top of the switching cylinder 510 is provided with a plurality of upper radial grooves 530, and the plurality of upper radial grooves 530 correspond to the plurality of light source accommodating grooves 520 one by one, and the ends of the upper radial grooves 530 extend to the top edge of the light source accommodating groove 520, and the light source accommodating grooves 520 are an even number; the upper cover body 210 is sleeved on the middle position of the bottom of the connecting shaft portion 230 and a first retractable ball 241 is provided at the bottom end of the first retractable ball 241. When the upper cover body 210 is sealed on the top of the detection outer shell 100, the first retractable ball 241 is in a vertical state. It can be inserted into the upper radial groove 530; in the embodiment of the present invention, when the light source part 800 opposite to the light-transmitting port 410 is switched, the switching cylinder 510 rotates, and whenever one of the light source accommodating grooves 520 corresponds to the light-transmitting port 410, the first ball 241 can be inserted into one of the upper radial grooves 530, so that the inspection personnel can judge by observing the first ball 241 being inserted into the upper radial groove 530. At this time, one of the light source accommodating grooves 520 and the light-transmitting port 410 is in a relative state, so that the light emitted by the light source part 800 can accurately enter the detection cavity, avoiding being blocked due to the misalignment of the light source accommodating groove 520 and the light-transmitting port 410.

[0036] The above embodiment provides a device for detecting the performance of an LED light guide plate, wherein before starting the detection, two light guide plates 700 are respectively installed on two installation units, and the end faces of the light guide plates 700 correspond to the light-transmitting openings 410 on the movable shielding plate 400; the two upper cover plate assemblies 200 cover the top ports of the detection outer shell 100, and make the two detection cavities in a closed state, the interiors of the two detection cavities are in darkness and without external light, and the light source part 800 corresponding to the light-transmitting opening 410 on the outer wall of the light source switching assembly 500 is turned on; the light generated by the light source part 800 passes through the light-transmitting opening 410 and directly irradiates the light guide plate 700, and the photosensitive detection plate 350 is used to detect the intensity of the light passing through the light guide plate 700, so as to detect the optical performance of the light guide plate 700 ; Rotate the light source switching component 500 and make the multiple light source parts 800 on the outer wall of the light source switching component 500 correspond to the light-transmitting port 410 in turn, and the multiple light source parts 800 respectively emit light of different colors, and then detect the optical performance of the light guide plate 700 for light of different colors; secondly, by adjusting the position of the movable shielding plate 400 and the light source switching component 500 relative to the detection body 300, the distance between the light source part 800 and the light guide plate 700 can be adjusted; at the same time, the top of the central rod shaft 320 is screwed and the central rod shaft 320 drives the rotating plate 330 to rotate, and then the light guide plate 700 and the photosensitive detection plate 350 are rotated into another detection cavity to detect the optical performance of the light emitted by another group of light source parts 800 on the light source switching component 500.

[0037] The above is only a specific implementation of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any person skilled in the art who is familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present disclosure, which should be included in the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be based on the protection scope of the claims.

Claims

1. A device for detecting performance of an LED light guide plate, comprising a detection outer shell, an upper cover assembly and a detection body, wherein the upper side and both ends of the detection outer shell are both opened, the detection body is arranged in the middle position of the detection outer shell and the detection body divides the interior of the detection outer shell into two detection cavities, characterized in that: The detection body includes a rectangular frame, a rotating plate and a mounting unit; Both sides of the rectangular frame are vertically slidably matched with the inner wall of the detection housing, and a central rod shaft rotatably connected thereto is provided in the middle of the rectangular frame, and the top of the central rod shaft extends to the upper side of the rectangular frame; The rotating plate is arranged on the central rod shaft, and when the two end surfaces of the rotating plate are respectively in a relative state with the two detection cavities, the outer edge of the rotating plate can be in sealing contact with the inner edge of the rectangular frame; Both end surfaces of the rotating plate are provided with a photosensitive detection plate and a mounting unit, and the mounting unit is used to detachably fix the light guide plate and make the light guide plate between the photosensitive detection plate and the detection cavity; the upper cover plate assembly is two and the two upper cover plate assemblies are symmetrically arranged on the top of the detection outer shell, and the two upper cover plate assemblies cooperate with each other and cover the top port of the detection outer shell; It also includes two light emitting mechanisms symmetrically arranged at both ends of the detection outer shell; The light emitting mechanism includes a movable shielding plate and a light source switching component; The movable shielding plate is arranged in the detection cavity and can move in the detection cavity in a manner close to the detection subject or away from the detection subject; The light source switching component is arranged on a side of the movable shielding plate away from the detection subject, and the upper and lower ends of the light source switching component are rotatably connected to the movable shielding plate; A plurality of light source parts are arranged on the outer wall of the light source switching assembly and a light transmission opening is opened in the middle part of the movable shielding plate, one of the light source parts corresponds to the light transmission opening and the light generated by the light source part passes through the light transmission opening into the detection cavity; The upper cover assembly comprises an upper cover body, a handle portion and a connecting shaft portion; The connecting shaft portion is rotatably connected to the end of the detection outer shell, and one side of the upper cover body is fixedly sleeved on the connecting shaft portion; The handle is arranged on the end surface of the upper cover body, and the upper cover body is connected to the rectangular frame through at least one connecting rod; The two ends of the connecting rod are respectively hinged to the end surface of the upper cover body and the side of the rectangular frame; The mounting unit comprises an upper limiting frame, a lower frame body and a clamping portion provided on the lower frame body; The upper limiting frame is arranged at a position close to the top of the end surface of the rotating plate and has a guide hole for the light guide plate to pass through. The lower frame is arranged at a position close to the bottom of the end surface of the rotating plate, and the clamping part includes a supporting shaft and two clamping strips; The support shaft body is provided with two sleeve parts rotatably connected thereto, and two clamping strips are respectively fixedly connected to the side walls of the two sleeve parts, the upper sides of the two clamping strips are folded outwards and the bottoms of the two clamping strips are respectively connected by a plurality of clamping springs; The movable shielding plate is in an arc shape and upper radial frames are provided at the upper and lower ends of the movable shielding plate; The light source switching assembly comprises a switching column and a rotating vertical shaft portion, the two ends of the rotating vertical shaft portion are respectively rotatably connected to the two upper radial frames, the switching column is arranged on the rotating vertical shaft portion, and the outer wall of the switching column is in sliding contact with the inner arc surface of the movable shielding plate; The outer wall of the switching column is provided with a plurality of light source accommodating grooves for installing the light source part along the axial direction thereof.

2. The LED light guide plate performance detection device according to claim 1, characterized in that: A first sealing strip is arranged on the upper edge of the detection outer shell and a second sealing strip is arranged on the upper edge of the movable shielding plate. When the upper cover plate body is sealed on the top end of the detection outer shell, the first sealing strip and the second sealing strip are in contact with the end surface of the upper cover plate body.

3. The LED light guide plate performance detection device according to claim 1, characterized in that: An upper lever is provided at the top of the central rod shaft, and second accommodating tube grooves are provided at both ends of the upper lever, and a second ball capable of elastic expansion and contraction is provided at the lower end of the second accommodating tube groove; Two grooves are arranged on the upper side of the rectangular frame. When the second accommodating tube groove is rotated to the upper side of the rectangular frame, the second ball can be placed inside the groove.

4. The LED light guide plate performance detection device according to claim 1, characterized in that: The surface of the movable shielding plate facing the detection cavity is also provided with two symmetrical CCD camera parts; The CCD camera unit and the photosensitive detection plate are both electrically connected to a display panel disposed on the outer wall of the detection housing. The CCD camera unit is used to photograph the state of the optical performance of the detection light guide plate in the detection cavity.

5. The LED light guide plate performance detection device according to claim 1, characterized in that: A plurality of upper radial slots are provided on the top of the switching cylinder, the plurality of upper radial slots correspond to the plurality of light source receiving slots one by one, and the ends of the upper radial slots extend to the top edge of the light source receiving slot; The light source receiving grooves are in an even number; the upper cover body is sleeved on the middle position of the bottom of the connecting shaft portion to provide a first receiving tube groove and a retractable first ball bearing is provided at the bottom end of the first receiving tube groove; When the upper cover plate body is sealed on the top of the detection outer shell, the first storage cylinder groove is in a vertical state, and the first ball can be inserted into the upper radial groove.

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