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CN-122015717-A - Flatness detection jig for LED backlight source module

CN122015717ACN 122015717 ACN122015717 ACN 122015717ACN-122015717-A

Abstract

The invention belongs to the technical field of flatness detection, and particularly relates to a flatness detection jig for an LED backlight module, which comprises a detection table, a PLC (programmable logic controller), a pressurizing and smoothing mechanism, a pressure maintaining pressure compensation mechanism, four groups of side extensibility feedback mechanisms, a detection failure feedback mechanism and a pressure maintaining duration confirmation mechanism. The invention can comprehensively, accurately and efficiently detect and correct the unevenness of the LED backlight source module, can determine the pressure maintaining pressure based on the maximum bending position, automatically adjust the pressure maintaining time length according to the unevenness state to ensure the correction quality, and can rapidly feed back the detection result to remind staff of recording.

Inventors

  • PENG LINFENG

Assignees

  • 深圳市凯柏瑞电子有限公司

Dates

Publication Date
20260512
Application Date
20260128

Claims (8)

  1. 1. The utility model provides a flatness detection tool of LED backlight module, includes detection platform (1) and PLC controller, its characterized in that still includes: the pressurizing and leveling mechanism (2) is fixedly arranged at the rear side of the upper end of the detection table (1); the pressure maintaining and pressure compensating mechanism (3) is arranged on the pressurizing and smoothing mechanism (2); four groups of side extension feedback mechanisms (4) are arranged at the upper end of the detection table (1) and are respectively arranged at four sides of the detection table (1); the unqualified detection feedback mechanism (5) is fixedly arranged at the lower end of the detection table (1) and is electrically connected with the side extensibility feedback mechanism (4); and the pressure maintaining duration confirmation mechanism (6) is arranged in the unqualified detection feedback mechanism (5).
  2. 2. The flatness detection jig for the LED backlight module according to claim 1, wherein the pressurizing and leveling mechanism (2) comprises an L-shaped vertical plate (21) fixedly arranged at the rear side of the upper end of the detection table (1), two electric push rods (22) are symmetrically and fixedly sleeved on the horizontal part of the L-shaped vertical plate (21), the lower end moving ends of the two electric push rods (22) are fixedly connected with the same pressurizing plate (23), a piezoelectric sheet (24) is fixedly arranged at the lower end of the pressurizing plate (23), and a laser range finder (25) is fixedly sleeved on the horizontal part of the L-shaped vertical plate (21).
  3. 3. The flatness detection jig for an LED backlight module according to claim 2, wherein the pressure-maintaining pressure compensation mechanism (3) comprises a fixed shell (31) fixedly arranged at the lower end moving ends of two electric push rods (22), a plurality of push rods (32) are movably inserted at the lower end of the fixed shell (31), the lower ends of the push rods (32) are fixedly connected to the upper end of the pressurizing plate (23), the upper ends of the push rods (32) are fixedly connected to the same push plate (33), a plurality of retaining springs (34) sleeved outside the push rods (32) are fixedly connected to the lower ends of the push plates (33) and the inner wall bottoms of the fixed shell (31), a force-bearing permanent magnet plate (35) is fixedly arranged at the upper end of the push plates (33), and a force-bearing electromagnetic plate (36) arranged opposite to the force-bearing permanent magnet plate (35) is fixedly arranged at the top of the inner wall of the fixed shell (31).
  4. 4. The flatness detection jig for the LED backlight module according to claim 1, wherein the side extensibility feedback mechanism (4) comprises an electric sliding rail (41) embedded at the upper end of the detection table (1), a sealing shell (42) is fixedly connected to the upper end of the sliding block in the electric sliding rail (41), a piston (43) is arranged in the sealing shell (42) in a sealing sleeve manner, one side of the piston (43) is fixedly connected with a plurality of push-pull rods (44), one ends of the push-pull rods (44) far away from the piston (43) penetrate through the sealing shell (42) and are fixedly connected with the same abutting blocks (45), a plurality of return springs (46) sleeved outside the push-pull rods (44) are fixedly connected between the abutting blocks (45) and the sealing shell (42), a barometer (47) is embedded at the rear end of the sealing shell (42), and the piston (43) is connected with the sealing shell (42) through a locking mechanism (7).
  5. 5. The flatness detection jig for LED backlight modules according to claim 1, wherein the unqualified feedback mechanism (5) comprises a feedback shell (51) fixedly arranged at the lower end of the detection table (1), a plurality of guide sliding rods (52) which are arranged side by side are fixedly connected to the upper side of the inner wall of the feedback shell (51), a pressing plate (53) and a sliding plate (54) are sleeved outside the guide sliding rods (52) in a sliding manner, a plurality of reset springs (55) which are sleeved outside the guide sliding rods (52) are fixedly connected to the opposite sides of the pressing plate (53) and the sliding plate (54) and the feedback shell (51), a thrust permanent magnet plate (56) is fixedly arranged on the side wall of the pressing plate (53), a thrust electromagnetic plate (57) which is arranged opposite to the thrust permanent magnet plate (56) is fixedly arranged on the inner wall of the feedback shell (51), and an unqualified warning switch (58) is fixedly arranged on one side of the sliding plate (54) close to the pressing plate (53).
  6. 6. The flatness detection jig for an LED backlight module according to claim 5, wherein the pressure maintaining time length confirmation mechanism (6) comprises a rotating screw (61) rotatably connected to the lower side of the inner wall of the feedback housing (51), the rotating screw (61) is arranged in parallel with the guide slide rod (52), a gear motor (62) for driving the rotating screw (61) to rotate is fixedly arranged on the outer wall of the feedback housing (51), a trigger plate (63) is sleeved on the rod wall screw thread of the rotating screw (61), and an in-place switch (64) opposite to the trigger plate (63) is fixedly arranged on the side wall of the pressing plate (53).
  7. 7. The flatness detection jig for an LED backlight module according to claim 4, wherein the locking mechanism (7) comprises a rotating motor (71) fixedly arranged on the side wall of the piston (43), an output end of the rotating motor (71) is fixedly connected with a rotating shaft (72), one end of the rotating shaft (72) away from the rotating motor (71) is fixedly connected with a locking plate (73), and two L-shaped side baffles (74) symmetrically arranged about the locking plate (73) are fixedly connected with an inner wall of the sealing shell (42).
  8. 8. The flatness detection jig for an LED backlight module according to claim 6, wherein the lower end of the trigger plate (63) is fixedly connected with a limit slide block, and a limit slide groove matched with the limit slide block and sliding-connected with the limit slide block is provided at the bottom of the inner wall of the feedback shell (51).

Description

Flatness detection jig for LED backlight source module Technical Field The invention belongs to the technical field of flatness detection, and particularly relates to a flatness detection jig for an LED backlight module. Background The LED backlight source module is an optical component composed of core components such as LED lamp beads, a light guide plate, a diffusion film, a light enhancement film and the like, and has the core function of providing a uniform and stable light source for a liquid crystal display (such as a television, a computer display, a mobile phone screen, a vehicle-mounted display screen, a smart watch and the like). In the liquid crystal display technology, the liquid crystal screen does not emit light and the image display is needed to be realized by depending on the backlight source module, so that the performance of the module directly determines the display quality of the terminal equipment. The flatness is used as a key performance index of the LED backlight source module, and the importance of the flatness is shown in a plurality of aspects: Firstly, the display uniformity is affected, if the module is warped, the optical films such as the light guide plate and the diffusion film are folded or gaps due to uneven stress, so that light is refracted and scattered abnormally in the propagation process, and finally the problems of uneven brightness, light spots, bright lines and the like of the screen are caused, so that the visual experience is seriously affected. Secondly, related to the life of module, uneven module can bear stress in assembly or use, can lead to the mechanical damage such as LED lamp bead welding point drops, light guide plate fracture to perhaps, still can aggravate ageing because of the diaphragm friction simultaneously, shortens whole life. In addition, the assembly precision and stability are affected, the uneven backlight source module is difficult to accurately attach to the liquid crystal screen on the production line of the terminal equipment, assembly deviation is possibly caused, even the screen is pressed and cracked, even the screen is assembled barely, structural deformation is possibly aggravated due to factors such as vibration and temperature change in the use process, and equipment failure is caused. Therefore, the flatness is not only a core standard for measuring the production process of the LED backlight source module, but also is directly related to the display effect, reliability and user experience of the terminal product, the traditional detection mode uses the marble plane as a reference, and after the LED backlight source module is placed on the reference plane, the LED backlight source module is detected by pressing the periphery of the module or by means of a feeler gauge, so that whether the module has warpage is judged. However, the working efficiency is low, the flatness of each point position of the module is more difficult to accurately detect, and the feedback of the overall flatness of the LED backlight module is affected. Disclosure of Invention The invention aims at providing a flatness detection jig for an LED backlight module aiming at the problems. In order to achieve the purpose, the invention adopts the following technical scheme that the flatness detection jig of the LED backlight source module comprises a detection table, a PLC controller and the following components: the pressurizing and smoothing mechanism is fixedly arranged at the rear side of the upper end of the detection table; The pressure maintaining and pressure compensating mechanism is arranged on the pressurizing and smoothing mechanism; four groups of side extension feedback mechanisms are arranged at the upper end of the detection table and are respectively arranged at four sides of the detection table; the unqualified detection feedback mechanism is fixedly arranged at the lower end of the detection table and is electrically connected with the side extensibility feedback mechanism; and the pressure maintaining duration confirmation mechanism is arranged in the unqualified detection feedback mechanism. In the flatness detection jig of the LED backlight module, the pressurizing and smoothing mechanism comprises an L-shaped vertical plate fixedly arranged at the rear side of the upper end of the detection table, two electric push rods are symmetrically and fixedly sleeved on the horizontal part of the L-shaped vertical plate, the lower end moving ends of the two electric push rods are fixedly connected with the same pressurizing plate, a piezoelectric plate is fixedly arranged at the lower end of the pressurizing plate, and a laser range finder is fixedly sleeved on the horizontal part of the L-shaped vertical plate. In the above-mentioned flatness detection tool of LED backlight module, pressurize pressure compensation mechanism including the fixed casing of fixed setting at two electric putter lower extreme remove the end, the lower extreme activity pl