CN117012123A - Liquid crystal display dead pixel detection equipment and detection method - Google Patents
Liquid crystal display dead pixel detection equipment and detection method Download PDFInfo
- Publication number
- CN117012123A CN117012123A CN202310788395.5A CN202310788395A CN117012123A CN 117012123 A CN117012123 A CN 117012123A CN 202310788395 A CN202310788395 A CN 202310788395A CN 117012123 A CN117012123 A CN 117012123A
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- crystal display
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- conveying belt
- clamping
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- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 107
- 238000001514 detection method Methods 0.000 title claims abstract description 41
- 239000002184 metal Substances 0.000 claims abstract description 71
- 238000007789 sealing Methods 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 9
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 230000002950 deficient Effects 0.000 claims 6
- 238000010586 diagram Methods 0.000 description 5
- 238000004880 explosion Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
Classifications
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/006—Electronic inspection or testing of displays and display drivers, e.g. of LED or LCD displays
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G23/00—Driving gear for endless conveyors; Belt- or chain-tensioning arrangements
- B65G23/22—Arrangements or mountings of driving motors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G23/00—Driving gear for endless conveyors; Belt- or chain-tensioning arrangements
- B65G23/38—Driving gear for endless conveyors; Belt- or chain-tensioning arrangements for effecting intermittent movement of belts or chains
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/54—Testing for continuity
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
Abstract
The invention relates to the technical field of product detection, in particular to a liquid crystal display dead pixel detection device and a detection method, comprising a conveying belt, wherein the conveying belt is used for conveying a liquid crystal display to be detected, a plurality of square grooves are uniformly and penetratingly formed in the conveying belt, the liquid crystal display corresponds to the square grooves in position, and an avoidance groove is formed in the middle of the bottom surface of the conveying belt along the conveying direction; the clamping mechanism is arranged at two sides of the conveying belt and comprises fixing frames which are symmetrically arranged at two sides of the conveying belt, a cavity is formed in the fixing frames, a plurality of strip-shaped grooves are uniformly formed in the top surface of the cavity, clamping pieces are fixed at the inner ends of the bottom surfaces of the fixing frames, and metal sheets are fixedly arranged in the middle of the clamping pieces; the movable piece is movably connected in the cavity. Through the moving part that sets up to and swing joint at the movable plate in the moving part, combine the metal column of fixed mounting on the movable plate, can high-efficient realization detect the bad point of LCD screen.
Description
Technical Field
The invention relates to the technical field of product detection, in particular to a liquid crystal display dead pixel detection device and a detection method.
Background
The LCD is an active matrix LCD driven by thin film transistors, which mainly uses current to stimulate liquid crystal molecules to generate points, lines and surfaces to be matched with back lamps to form a picture.
The production of LCD usually goes on with the assembly line mode, when LCD screen assembly is accomplished the back, need detect the circuit part in the LCD after the assembly to guarantee the quality of product, when LCD appears breaking the circuit problem, because LCD's circuit connected node is more, need the manual work to carry out multiple spot break-make and detect, efficiency is lower.
Disclosure of Invention
Aiming at the defects existing in the prior art, the invention provides the liquid crystal display dead spot detection equipment and the detection method, which can effectively solve the problems that after the assembly of the existing liquid crystal display screen is completed, circuit parts in the assembled liquid crystal display are required to be detected so as to ensure the quality of products, and when the liquid crystal display has the problem of disconnection, the circuit connection nodes of the liquid crystal display are more, the manual multipoint on-off detection is required, and the efficiency is lower.
In order to achieve the above purpose, the invention is realized by the following technical scheme:
the invention provides liquid crystal display dead pixel detection equipment, which comprises a conveying belt, wherein the conveying belt is used for conveying a liquid crystal screen to be detected, a plurality of square grooves are uniformly formed in the conveying belt in a penetrating mode, the liquid crystal screen corresponds to the square grooves in position, and avoidance grooves are formed in the middle of the bottom surface of the conveying belt along the conveying direction; the clamping mechanism is arranged at two sides of the conveying belt and comprises fixing frames which are symmetrically arranged at two sides of the conveying belt, a cavity is formed in the fixing frames, a plurality of strip-shaped grooves are uniformly formed in the top surfaces of the cavities, clamping pieces are fixed at the inner ends of the bottom surfaces of the fixing frames, metal sheets are fixedly arranged in the middle of the clamping pieces, and the lower ends of the fixing frames are connected with first piston rods through connecting plates; the movable part is movably connected in the cavity, and is fixedly connected with the output end of the external cylinder through a connecting rod fixedly arranged on the movable part, and a sealing cavity is formed in the movable part and is movably connected in the sealing cavity.
Further, the liquid crystal display panel further comprises an adjusting mechanism, wherein the adjusting mechanism is used for adjusting the distance between the two fixed frames in the clamping mechanism, so that the metal sheet fixedly arranged on the clamping piece can be electrically connected with the metal groove at the side edge of the liquid crystal display panel; the device comprises a rotating shaft, wherein two groups of threads with opposite directions are formed on the rotating shaft in a symmetrical structure, and a connecting plate is meshed with the threads on the rotating shaft; when the metal sheet is positioned in the metal groove, the liquid crystal screen can be electrified, and the liquid crystal screen is electrified and detected.
Further, the liquid crystal display device also comprises an auxiliary positioning mechanism for carrying out auxiliary positioning on the liquid crystal display; the auxiliary positioning mechanism comprises two clamping plates which are symmetrically arranged, the top ends of the clamping plates are fixedly provided with lapping plates, the top surfaces of the clamping plates are provided with arc surfaces, the bottom surfaces of the clamping plates are fixedly provided with second piston rods, and second piston tubes which are movably connected with the second piston rods; still include the mounting bracket of fixed mounting in the holder bottom surface, fixed mounting has first piston tube on the mounting bracket, first piston rod and first piston tube sliding fit to keep communicating in first piston tube and the second piston tube.
Further, the outer wall of the clamping plate is in sliding fit with the inner wall of the avoidance groove; when the conveyer belt is transmitted, the clamping plate is arranged at the lower side of the conveyer belt, and when the conveyer belt is used for conveying the liquid crystal display, the outer wall of the clamping plate and the inner wall of the avoidance groove slide relatively.
Further, the device also comprises a third piston rod fixedly arranged at two sides of the moving piece; the third piston rod is in sliding fit with a third piston tube fixedly arranged on the outer wall of the fixed frame; and the inside of the third piston tube is communicated with the inside of the sealing cavity through a communicating tube.
Further, the device also comprises a through groove arranged on the bottom surface of the moving part; the metal posts correspond to the locations of the through slots and are capable of maintaining electrical connection with the metal contacts on the top surface of the liquid crystal panel when the metal posts extend from within the through slots.
A method for detecting bad pixels of a liquid crystal display comprises the following steps:
s100: the liquid crystal display screen placed on the conveyor belt is conveyed through the conveyor belt, and the conveyor belt is driven by an external servo motor to intermittently convey the liquid crystal display screen;
s200: when the liquid crystal screen is positioned between the middle parts of the two fixed frames, the two connecting plates meshed and connected on the rotating shafts are driven to adjust the positions by utilizing the rotation of the rotating shafts through the arranged adjusting mechanism, so that the metal sheets fixedly arranged on the clamping pieces can be electrically connected with the metal grooves on the side edges of the liquid crystal screen, the liquid crystal screen is electrified and detected, and the two arranged metal sheets are respectively connected with the anode and the cathode of a power supply;
s300: in the power-on detection process in step S200, when the liquid crystal screen is not powered on, power-on detection is required for each liquid crystal group in the liquid crystal screen, at this time, an external cylinder is arranged to drive a moving part movably connected in the fixed frame to extend out from the cavity, and a moving plate extends out from the sealed cavity, so that stable contact between the metal column and a metal contact on the liquid crystal screen is ensured, and re-power-on detection is performed;
s400: the detection of dead pixels on the liquid crystal screen is realized by controlling the on-off state of each metal column.
Advantageous effects
Compared with the known public technology, the technical scheme provided by the invention has the following beneficial effects:
according to the invention, through the moving part and the moving plate movably connected in the moving part, and the metal column fixedly arranged on the moving plate, the dead pixel detection of the liquid crystal display can be efficiently realized.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It is evident that the drawings in the following description are only some embodiments of the present invention and that other drawings may be obtained from these drawings without inventive effort for a person of ordinary skill in the art.
FIG. 1 is a schematic diagram of the overall structure of a detection device according to the present invention;
FIG. 2 is a schematic diagram of the overall explosion structure of the detection device of the present invention;
FIG. 3 is a schematic view of an exploded construction of the conveyor belt of the present invention;
FIG. 4 is an enlarged schematic view of the structure of FIG. 3A according to the present invention;
FIG. 5 is a schematic view of an explosion structure at a fixed frame and a moving member according to the present invention;
FIG. 6 is a schematic view of the structure of the fixed frame and the moving member separated from each other;
FIG. 7 is a schematic diagram of the structure of the moving plate and the moving member when the moving plate and the moving member are separated;
FIG. 8 is a schematic view of a cross-sectional structure of a moving member according to the present invention;
FIG. 9 is a schematic diagram showing the front view of the detecting device of the present invention;
FIG. 10 is a schematic top view of the detection apparatus of the present invention;
fig. 11 is a schematic diagram of a detection method of the detection apparatus of the present invention.
1. A liquid crystal panel; 11. a metal contact; 12. a metal groove;
100. a conveyor belt; 101. a square groove; 102. an avoidance groove;
200. a fixed frame; 201. a cavity; 202. a bar-shaped groove;
210. a clamping member; 211. a metal sheet; 220. a connecting plate; 230. a first piston rod;
300. a moving member; 301. sealing the cavity; 302. a through groove;
310. a connecting rod; 320. a communicating pipe; 330. a third piston rod;
400. a third piston tube;
500. a moving plate; 510. a metal column;
600. a rotating shaft; 601. a thread;
700. a mounting frame; 710. a first piston tube;
800. a clamping plate; 801. an arc surface;
810. a lapping plate; 820. a second piston rod; 830. and a second piston tube.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It will be apparent that the described embodiments are some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The invention is further described below with reference to examples.
Examples:
referring to fig. 1-10, a device for detecting a dead pixel of a liquid crystal display, including a conveyor belt 100, for conveying a liquid crystal display 1 to be detected, a plurality of square grooves 101 are uniformly formed in the conveyor belt 100 in a penetrating manner, the liquid crystal display 1 corresponds to the square grooves 101, and an avoiding groove 102 is formed in the middle of the bottom surface of the conveyor belt 100 along the conveying direction, it is worth noting that the conveyor belt 100 is provided, and the conveyor belt 100 is driven by an external servo motor, so that the conveyor belt 100 can intermittently convey the liquid crystal display 1 placed on the upper side of the conveyor belt 100, and it is worth noting that when the conveyor belt 100 stops conveying the liquid crystal display 1, the provided detection clamping mechanism can perform power-on detection on the liquid crystal display 1.
It should be noted that, in order to ensure that when the liquid crystal display 1 is electrically tested, the position of the liquid crystal display 1 can be determined, in this case, a clamping mechanism is further provided, specifically, the clamping mechanism is disposed at two sides of the conveyor belt 100, and includes fixing frames 200 disposed at two sides of the conveyor belt 100 in a symmetrical structure, and further includes an adjusting mechanism for adjusting a distance between the two fixing frames 200 in the clamping mechanism, including a rotating shaft 600, two groups of threads 601 in opposite directions are disposed on the rotating shaft 600 in a symmetrical structure, and the connecting plates 220 are engaged with the threads 601 on the rotating shaft 600, the disposed rotating shaft 600 is fixedly connected with an output end of an external motor, when the rotating shaft 600 rotates, the two connecting plates 220 are combined with a relationship of engaged connection between the threads 601 which can be disposed on the rotating shaft 600, and because the two threads 601 are disposed in opposite directions, when the rotating shaft 600 rotates, the two connecting plates 220 are adjacent to each other, and further drive the fixing frames 200 which are fixedly connected with the rotating shaft 200 to each other, the inner ends of the fixing frames 200 are fixedly provided with clamping pieces 210, and the middle part of the clamping pieces 210 is fixedly mounted with metal pieces 211, and when the two fixing frames 200 are fixedly connected with the metal pieces 211 on the side edges of the metal display 12; and then the liquid crystal panel 1 is electrically detected.
In order to ensure the accurate position fixing of the liquid crystal screen 1, the liquid crystal screen further comprises an auxiliary positioning mechanism in the vertical direction, wherein the auxiliary positioning mechanism is used for carrying out auxiliary positioning on the liquid crystal screen 1; the auxiliary positioning mechanism comprises two clamping plates 800 which are symmetrically arranged, wherein a lapping plate 810 is fixedly arranged at the top end of each clamping plate 800, an arc-shaped surface 801 is arranged on the top surface of each clamping plate 800, a second piston rod 820 is fixedly arranged on the bottom surface of each clamping plate 800, and a second piston tube 830 which is movably connected with the second piston rod 820; the liquid crystal display device further comprises a mounting frame 700 fixedly mounted on the bottom surface of the clamping piece 210, a first piston tube 710 is fixedly mounted on the mounting frame 700, the first piston rod 230 is in sliding fit with the first piston tube 710, the first piston tube 710 is communicated with the second piston tube 830, when the two fixing frames 200 are close to each other, the first piston rod 230 which is fixedly kept by the connecting plate 220 and the fixing frames 200 can synchronously move, in the process, the first piston rod 230 can slide on the first piston tube 710, gas which is originally positioned in the first piston tube 710 enters the second piston tube 830, the second piston rod 820 which is movably connected in the second piston tube 830 moves upwards, the fixed connection relation between the first piston rod 820 and the fixing plates 800 is combined, the clamping plates 800 can be driven to move upwards, and the outer wall of the clamping plates 800 can be in sliding fit with the inner wall of the square groove 101 which is formed in the conveying belt 100, and the outer wall of the clamping plates 800 is worth of the liquid crystal display device is provided with an arc-shaped outer wall 801, the outer wall 801 which is worth of the clamping plates 800 can be positioned with the arc-shaped liquid crystal display device 1, and the liquid crystal display device can be positioned in the arc-shaped metal display device 1, and the liquid crystal display device can be positioned in the arc-shaped display device 1, and the liquid crystal display device can be positioned in the liquid crystal display device 1, and the metal display device can be detected, after the liquid crystal display device is positioned in the metal display device is 1, and the liquid crystal display device can be detected.
And it should be noted that, the outer wall of the clamping plate 800 is in sliding fit with the inner wall of the avoiding groove 102; when the conveyor belt 100 drives, the clamping plate 800 is arranged at the lower side of the conveyor belt 100, and when the conveyor belt 100 conveys the liquid crystal display 1, the outer wall of the clamping plate 800 and the inner wall of the avoidance groove 102 slide relatively.
A cavity 201 is formed in the fixing frame 200, and a plurality of strip-shaped grooves 202 are uniformly formed in the top surface of the cavity 201; the moving member 300 is movably connected inside the cavity 201, and is fixedly connected with the output end of the external cylinder through a connecting rod 310 fixedly installed on the moving member 300, and a sealing cavity 301 is formed inside the moving member 300, and the sealing cavity 301 is movably connected. And a third piston rod 330 fixedly installed at both sides of the moving member 300; the third piston rod 330 is slidably engaged with the third piston tube 400 fixedly installed on the outer wall of the fixed frame 200; and the inside of the third piston tube 400 communicates with the inside of the hermetic chamber 301 through the communicating tube 320. Also comprises a through groove 302 arranged on the bottom surface of the moving piece 300; the metal posts 510 correspond to the locations of the through slots 302 and are capable of maintaining electrical connection with the metal contacts 11 on the top surface of the liquid crystal panel 1 when the metal posts 510 extend from within the through slots 302.
Through the overlap connection between the metal sheet 211 and the metal groove 12, the first current detection of the liquid crystal screen 1 can be achieved, if the line is not through as a result of the first current detection, then the specific dead point in the liquid crystal screen 1 needs to be detected, specifically, through an external air cylinder, the moving member 300 movably connected in the fixed frame 200 is driven to adjust the position, so that the moving member 300 extends out of the cavity 301 formed in the fixed frame 200, when the moving member 300 moves, the third piston rod 330 fixedly connected with the moving member moves synchronously, at this time, the third piston rod 330 extrudes the gas in the third piston tube 400, and the combined third piston tube 400 maintains a communication relationship with the sealing cavity 301 through the communicating pipe 320, so that the moving plate 500 movably connected in the sealing cavity 301 moves downwards, at this time, the metal column 510 fixedly installed under the moving plate 500 extends out of the through groove 302 and finally contacts with the metal contact 11 on the liquid crystal screen 1, and the metal column 510 is reasonably controlled by an external control mechanism, so that whether the liquid crystal column is detected by a plurality of dead points is reasonably controlled.
It should be noted that, when the liquid crystal display 1 is electrically detected for the first time, the two metal sheets 21 are respectively communicated with the positive electrode and the negative electrode of the external power supply, so as to detect the on-off state of the liquid crystal display 1, and when the metal column 510 is subsequently used for electrically detecting the metal contact 11 on the liquid crystal display 1, the metal column 510 is completely attached to the metal contact 11 to keep stable contact at first, and in the detection process, in a plurality of groups of detection links, only two metal columns 510 are respectively communicated with the positive electrode and the negative electrode of the external power supply, so as to detect the liquid crystal group between the two metal contacts 11 until the position of a dead pixel in the liquid crystal display 1 is found.
A method for detecting bad pixels of a liquid crystal display comprises the following steps:
s100: the a driving device and a control device, wherein the liquid crystal display device is arranged on a conveyor belt 100, the liquid crystal display device 1 placed on the conveyor belt 100 is conveyed through the conveyor belt 100, and the conveyor belt 100 is driven by an external servo motor to intermittently convey the liquid crystal display device 1;
s200: when the liquid crystal screen 1 is positioned between the middle parts of the two fixed frames 200, the two connecting plates 220 which are meshed and connected on the rotating shaft 600 are driven to adjust the positions by utilizing the rotation of the rotating shaft 600 through the arranged adjusting mechanism, so that the metal sheets 211 fixedly arranged on the clamping piece 210 can be electrically connected with the metal grooves 12 on the side edges of the liquid crystal screen 1, the liquid crystal screen 1 is electrified and detected, and the two arranged metal sheets 211 are respectively connected with the positive electrode and the negative electrode of a power supply;
s300: in the power-on detection process in step S200, when the lcd 1 is not powered on, then power-on detection is required for each lcd group in the lcd 1, and at this time, by setting an external cylinder, the moving member 300 movably connected in the fixed frame 200 is driven to extend out of the cavity 201, and the moving plate 500 extends out of the sealed cavity 301, so as to ensure stable contact between the metal column 510 and the metal contact 11 on the lcd 1, and perform power-on detection again;
s400: the detection of the dead pixel on the liquid crystal display 1 is realized by controlling the on-off state of each metal column 510.
Specifically, in step S400, a control method is further included for reasonably controlling whether the metal column 510 is on or off, firstly, the metal column 510 which is in lap joint with the metal contacts 11 closest to the two metal grooves 12 is powered on, then the power-on state of the metal column 510 is continuously changed gradually from the power-on ends to the middle part, when the power-off is detected, one corresponding liquid crystal group of the two metal contacts 11 which are communicated with the metal column 510 is a dead point position, and the determination of the dead point position is realized by respectively powering on the two metal contacts 11 adjacent to the dead point position, as shown in fig. 11.
The above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; these modifications or substitutions do not depart from the essence of the corresponding technical solutions from the protection scope of the technical solutions of the embodiments of the present invention.
Claims (7)
1. A liquid crystal display dead pixel detection apparatus, comprising:
the liquid crystal display device comprises a conveying belt (100) and a detection device, wherein the conveying belt (100) is used for conveying a liquid crystal display (1) to be detected, a plurality of square grooves (101) are uniformly formed in the conveying belt (100) in a penetrating mode, the liquid crystal display (1) corresponds to the square grooves (101), and an avoidance groove (102) is formed in the middle of the bottom surface of the conveying belt (100) along the conveying direction;
the clamping mechanism is arranged at two sides of the conveying belt (100), and comprises fixing frames (200) which are symmetrically arranged at two sides of the conveying belt (100), a cavity (201) is formed in the fixing frames (200), a plurality of strip-shaped grooves (202) are uniformly formed in the top surface of the cavity (201), clamping pieces (210) are fixed at the inner ends of the bottom surfaces of the fixing frames (200), metal sheets (211) are fixedly arranged in the middle of the clamping pieces (210), and the lower ends of the fixing frames (200) are connected with first piston rods (230) through connecting plates (220);
the movable part (300) is movably connected inside the cavity (201), the movable part is fixedly connected with the output end of the external cylinder through a connecting rod (310) fixedly installed on the movable part (300), a sealing cavity (301) is formed in the movable part (300), a movable plate (500) is movably connected in the sealing cavity (301), and metal columns (510) are uniformly connected on the inner wall of the movable plate (500).
2. The apparatus for detecting a defective pixel of a liquid crystal display according to claim 1, wherein,
the liquid crystal display device further comprises an adjusting mechanism, wherein the adjusting mechanism is used for adjusting the distance between two fixing frames (200) in the clamping mechanism, so that a metal sheet (211) fixedly arranged on the clamping piece (210) can be electrically connected with a metal groove (12) at the side edge of the liquid crystal display screen (1);
the device comprises a rotating shaft (600), wherein two groups of threads (601) with opposite directions are formed on the rotating shaft (600) in a symmetrical structure, and a connecting plate (220) is meshed and connected with the threads (601) on the rotating shaft (600);
when the metal sheet (211) is positioned in the metal groove (12), the liquid crystal screen (1) can be electrified, and the liquid crystal screen (1) is electrified and detected.
3. The apparatus for detecting a defective pixel of a liquid crystal display according to claim 2, wherein,
the auxiliary positioning mechanism is used for carrying out auxiliary positioning on the liquid crystal screen (1); the auxiliary positioning mechanism comprises two clamping plates (800) which are symmetrically arranged, a lapping plate (810) is fixedly arranged at the top end of each clamping plate (800), an arc-shaped surface (801) is formed on the top surface of each clamping plate (800), a second piston rod (820) is fixedly arranged on the bottom surface of each clamping plate (800), and a second piston tube (830) which is movably connected with the second piston rod (820);
the device further comprises a mounting frame (700) fixedly mounted on the bottom surface of the clamping piece (210), a first piston tube (710) is fixedly mounted on the mounting frame (700), the first piston rod (230) is in sliding fit with the first piston tube (710), and the first piston tube (710) is communicated with the second piston tube (830).
4. A liquid crystal display defective pixel detecting device according to claim 3, wherein,
the outer wall of the clamping plate (800) is in sliding fit with the inner wall of the avoidance groove (102);
when the conveyer belt (100) drives, the clamping plate (800) is positioned at the lower side of the conveyer belt (100), and when the conveyer belt (100) conveys the liquid crystal display screen (1), the outer wall of the clamping plate (800) and the inner wall of the avoidance groove (102) slide relatively.
5. The liquid crystal display dead pixel detection apparatus according to claim 1, further comprising:
a third piston rod (330) fixedly installed at both sides of the moving member (300);
the third piston rod (330) is in sliding fit with a third piston tube (400) fixedly arranged on the outer wall of the fixed frame (200); and the inside of the third piston tube (400) is communicated with the inside of the seal chamber (301) through the communicating tube (320).
6. The apparatus for detecting a defective pixel of a liquid crystal display according to claim 1, wherein,
the device also comprises a through groove (302) arranged on the bottom surface of the moving piece (300);
the metal posts (510) correspond to the positions of the through slots (302), and can be electrically connected with the metal contacts (11) on the top surface of the liquid crystal screen (1) when the metal posts (510) extend out of the through slots (302).
7. A method for detecting a defective pixel of a liquid crystal display using a defective pixel detecting device of a liquid crystal display according to any one of claims 1 to 6, comprising the steps of:
s100: the liquid crystal display device comprises a conveying belt (100) arranged, a liquid crystal display device and a control system, wherein the conveying belt (100) is used for conveying a liquid crystal display (1) arranged on the conveying belt (100), and an external servo motor is used for driving the conveying belt (100) to intermittently convey the liquid crystal display (1);
s200: when the liquid crystal screen (1) is positioned between the middle parts of the two fixed frames (200), the two connecting plates (220) meshed and connected to the rotating shaft (600) are driven to adjust the positions by utilizing the rotation of the rotating shaft (600) through the arranged adjusting mechanism, so that the metal sheets (211) fixedly arranged on the clamping piece (210) can be electrically connected with the metal grooves (12) on the side edges of the liquid crystal screen (1), the liquid crystal screen (1) is electrified and detected, and the two arranged metal sheets (211) are respectively connected with the anode and the cathode of a power supply;
s300: in the power-on detection process in the step S200, when the liquid crystal screen (1) displays no power-on, power-on detection is required for each liquid crystal group in the liquid crystal screen (1), at this time, an external air cylinder is arranged to drive a moving part (300) movably connected in the fixed frame (200) to extend out from the cavity (201), and a moving plate (500) extends out from the sealed cavity (301), so that stable contact between the metal column (510) and the metal contact (11) on the liquid crystal screen (1) is ensured, and power-on detection is performed again;
s400: the detection of dead pixels on the liquid crystal display (1) is realized by controlling the on-off state of each metal column (510).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310788395.5A CN117012123B (en) | 2023-06-30 | 2023-06-30 | Liquid crystal display dead pixel detection equipment and detection method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310788395.5A CN117012123B (en) | 2023-06-30 | 2023-06-30 | Liquid crystal display dead pixel detection equipment and detection method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN117012123A true CN117012123A (en) | 2023-11-07 |
| CN117012123B CN117012123B (en) | 2023-12-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202310788395.5A Active CN117012123B (en) | 2023-06-30 | 2023-06-30 | Liquid crystal display dead pixel detection equipment and detection method |
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