CN111168248A - Light guide plate mesh point processing device and method based on arc reflection - Google Patents
Light guide plate mesh point processing device and method based on arc reflectionDownload PDFInfo
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- CN111168248A CN111168248ACN202010049945.8ACN202010049945ACN111168248ACN 111168248 ACN111168248 ACN 111168248ACN 202010049945 ACN202010049945 ACN 202010049945ACN 111168248 ACN111168248 ACN 111168248A
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- 238000001259photo etchingMethods0.000description3
- 238000000206photolithographyMethods0.000description3
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/36—Removing material
- B23K26/362—Laser etching
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/02—Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
- B23K26/06—Shaping the laser beam, e.g. by masks or multi-focusing
- B23K26/064—Shaping the laser beam, e.g. by masks or multi-focusing by means of optical elements, e.g. lenses, mirrors or prisms
- B23K26/0643—Shaping the laser beam, e.g. by masks or multi-focusing by means of optical elements, e.g. lenses, mirrors or prisms comprising mirrors
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
- G02B6/004—Scattering dots or dot-like elements, e.g. microbeads, scattering particles, nanoparticles
- G02B6/0043—Scattering dots or dot-like elements, e.g. microbeads, scattering particles, nanoparticles provided on the surface of the light guide
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0065—Manufacturing aspects; Material aspects
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Abstract
Description
Technical Field
The invention relates to the technical field of light guide plate processing, in particular to a light guide plate mesh point processing device and method based on arc reflection.
Background
The lcd does not emit light, so the backlight module is required to emit light, and the quality of the lcd is closely related to the performance of the backlight. The backlight quality determines important parameters such as brightness, picture uniformity, color gradation and the like of the liquid crystal display screen, and determines the luminous effect of the liquid crystal display screen to a great extent. The high quality of the lcd means a high quality backlight module, and the function of the light guide plate in the backlight module is very important, and the size and density of the scattering dots in the light guide plate determine the brightness and uniformity of the output light, so that the stable distribution of the dots on the light guide plate is one of the key technologies of the backlight module.
At present, when a laser method is used for processing mesh points traditionally, a laser head moves relative to a substrate so as to process the mesh points at different positions of the substrate, and at the moment, the path of a laser beam from a laser light source to a light guide plate is changed.
Disclosure of Invention
Based on the technical problems in the prior art, the invention provides a light guide plate mesh point processing device and method based on arc reflection, and the processing efficiency and quality of a light guide plate are improved.
The invention provides a light guide plate mesh point processing device based on arc reflection, which comprises a rack and a processing platform for fixing a light guide plate, wherein the processing platform is arranged on the rack and movably connected with the rack;
the reflecting mechanism comprises a first reflecting mirror group used for reflecting laser emitted by the laser and a second reflecting mirror group used for reflecting the laser reflected by the first reflecting mirror group, the output end of the driving mechanism is in driving connection with the first reflecting mirror group, and the second reflecting mirror group is fixed on the rack.
Furthermore, the first reflecting mirror group comprises a rotating disc and a plurality of first reflecting mirrors, the plurality of first reflecting mirrors are sequentially connected and annularly fixed on the rotating disc, and one surface of the rotating disc, which is far away from the first reflecting mirrors, is connected with the output end of the driving mechanism.
Further, the second reflector group comprises a focusing lens and a second reflector, and both the focusing lens and the second reflector can be adjustably fixed on the rack;
the light inlet end of the focusing lens is fixedly connected with the light outlet end of the second reflector, and the light outlet end of the focusing lens is arranged above the light guide plate.
Furthermore, the driving mechanism comprises a first servo motor and an eccentric coupling, the first servo motor is arranged below the rotating disc, the output end of the first servo motor is fixedly connected with the center of the rotating disc, and the first reflector group is fixedly connected with the rotating disc through the eccentric coupling.
Furthermore, the focusing lens and the second reflecting lens are both arc-shaped lenses, the axes of the focusing lens, the second reflecting lens and the first servo motor are overlapped, and the light inlet end of the focusing lens is arranged right below the light outlet end of the second reflecting lens.
Furthermore, a laser adjusting mechanism is arranged between the laser and the reflecting mechanism, the laser input end of the laser adjusting mechanism is arranged corresponding to the laser output end of the laser, and the laser output end of the laser adjusting mechanism is arranged corresponding to the laser input end of the reflecting mechanism.
Furthermore, the laser adjusting mechanism comprises an acousto-optic modulator and a third reflector group which reflects the laser passing through the acousto-optic modulator to the first reflector group, the laser input end of the acousto-optic modulator is arranged corresponding to the laser output end of the laser, and the laser output end of the acousto-optic modulator is arranged corresponding to the laser input end of the third reflector group.
Furthermore, the third mirror group includes a third mirror, a fourth mirror, a fifth mirror, a sixth mirror and a beam dissipator, a laser input end of the third mirror corresponds to a laser output end of the acousto-optic modulator, a laser output end of the third mirror corresponds to a laser input end of the fourth mirror and a laser input end of the fifth mirror, a laser output end of the fourth mirror corresponds to a laser input end of the beam dissipator, a laser output end of the fifth mirror corresponds to a laser input end of the sixth mirror, and a laser output end of the sixth mirror is connected to a laser input end of the first mirror.
Furthermore, the number of the first reflection lenses is four, and the four first reflection lenses are sequentially connected to form an annular first reflection lens group.
A backlight module comprises a light guide plate processed by the processing device.
A light guide plate mesh point processing method based on arc reflection comprises the following steps:
presetting a starting processing coordinate and an ending processing coordinate of each mesh point of the light guide plate, and presetting a set distance for the light guide plate to move forwards when the first reflector group rotates a set angle;
the driving mechanism drives the rotating disc to rotate to a set rotating speed;
the light guide plate moves to a first initial processing coordinate along with the processing platform;
the first reflector group rotates to a set angle, laser emitted by the laser is reflected to the light guide plate through the first reflector group and the second reflector group, and the laser stops emitting the laser until the light guide plate moves to the coordinate processing end;
and circularly rotating the rotating disc, and after the mesh points on the light guide plate are processed, resetting the processing platform to the original set position to complete the processing of the mesh points on the light guide plate.
The light guide plate mesh point processing device and method based on arc reflection provided by the invention have the advantages that: according to the light guide plate mesh point processing device and method based on arc reflection, provided by the structure, the traditional linear acceleration and deceleration motion is converted into the rotation motion, so that the uniform speed operation of the rotation direction of the reflection mechanism can be ensured, the energy loss defect of the acceleration and deceleration motion during the traditional linear processing is overcome, and the processing efficiency and quality of the light guide plate are improved; the first reflector group rotates, the second reflector group is fixed, and the debugging process is simplified, so that the processing time of each dot on the light guide plate is consistent, and the processing quality of each dot is similar; the laser is reflected to the light guide plate through the first reflector and the second reflector, so that the optical path corresponding to each mesh point processing on the light guide plate is basically consistent, the energy consumption is basically consistent, the quality areas of the mesh point processing on the light guide plate are consistent, and the processing quality of the mesh points on the light guide plate is improved; only the first reflector group is positioned on the rotating shaft center to rotate, and the second reflector group is fixed, so that the defect that laser cannot be emitted according to a set light path due to centrifugal force is overcome, the weight of the rotating part of the whole device is reduced, the movement load is reduced, the requirement of operating parts is reduced, and the equipment cost and the processing cost of the light guide plate are finally reduced.
Drawings
FIG. 1 is a schematic structural diagram of a light guide plate mesh point processing device based on arc reflection according to the present invention;
FIG. 2 is a schematic structural view of a reflection mechanism;
FIG. 3 is a schematic view of a first mirror group;
FIG. 4 is a schematic view illustrating the processing of a first row of dots on a light guide plate;
FIG. 5 is a schematic view of a plurality of rows of dots on a light guide plate;
the system comprises a processing platform 1, a laser 2, areflection mechanism 3, a driving mechanism 4, alaser adjusting mechanism 5, afirst light path 6, aframe 7, asecond light path 9, afirst reflector group 32, asecond reflector group 33, a rotating shaft 34, afirst servo motor 41, aneccentric coupling 42, an acousto-optic modulator 51, athird reflector group 52, arotating disc 321, afirst reflector 322, a focusinglens 331, a second reflector, athird reflector 521, afourth reflector 522, afifth reflector 523, asixth reflector 524 and abeam dissipater 525.
Detailed Description
The present invention is described in detail below with reference to specific embodiments, and in the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, but rather should be construed as broadly as the present invention is capable of modification in various respects, all without departing from the spirit and scope of the present invention.
Referring to fig. 1 to 5, the light guide plate mesh point processing device based on arc reflection provided by the invention comprises aframe 7 and a processing platform 1 for fixing a light guide plate, wherein the processing platform 1 is arranged on theframe 7 and movably connected with theframe 7, theframe 7 is also provided with a laser 2, areflection mechanism 3 for reflecting laser emitted by the laser 2 onto the light guide plate and a driving mechanism 4 for driving thereflection mechanism 3 to rotate, and the driving mechanism 4 is fixed on theframe 7; thereflecting mechanism 3 comprises a first reflectingmirror group 32 for reflecting laser light emitted by the laser 2 and a second reflectingmirror group 33 for reflecting the laser light reflected by the first reflectingmirror group 32, the output end of the driving mechanism 4 is in driving connection with the first reflectingmirror group 32, and the second reflectingmirror group 33 is fixed on theframe 7.
The processing platform 1 can be movably fixed on theframe 7, meanwhile, devices for processing the mesh points are fixed on theframe 7, a second servo motor is arranged on theframe 7, the second servo motor drives the processing platform 1 to move on theframe 7 so as to realize movable connection of the processing platform 1 and theframe 7, and the processing platform 1 is driven by the second servo motor to realize linear motion so as to realize processing of the mesh points of the light guide plate.First speculum group 32 passes through actuating mechanism 4 drive and rotates, andsecond speculum group 33 is fixed, has improved and has set up a plurality of speculums and correspond withfirst speculum group 32 to reflect the laser thatfirst speculum group 32 reflects to the defect on the light guide plate, because when setting up a plurality of speculums, the angle that needs to guarantee every mirror piece is close, need debug the focus of the focus lens of being connected with every mirror piece simultaneously, and the whole debugging degree of difficulty is big.
According to the invention, a fixedsecond reflector group 33 is adopted to replace a plurality of traditional reflectors and a plurality of traditional focusing lenses, and the processing effect of the light guide plate at each angle of thefirst reflector group 32 can be ensured to be similar only by adjusting the states of the reflectors in thesecond reflector group 33 to be consistent, so that the debugging process is simplified; meanwhile, in the device, only thefirst reflector group 32 is positioned on the rotating axis to rotate, and thesecond reflector group 33 is fixed, so that the defect that laser cannot be emitted according to a given light path due to centrifugal force is overcome.
Thesecond reflector set 33 is fixed on theframe 7, and thesecond reflector set 33 can be adjusted according to the reflection state of the first reflector set 32 to the laser, so that the laser can effectively reach the light guide plate. Meanwhile, thesecond reflector group 33 is fixedly arranged, so that the weight of the rotating part of the whole device is reduced, the movement load is reduced, the requirement of operating parts is further reduced, and the equipment cost and the processing cost of the light guide plate are finally reduced.
On the other hand, when the light guide plate rotates for a certain angle, the light guide plate moves for a set distance in a certain direction; the traditional linear processing is optimized to be rotary processing, the energy loss defect of acceleration and deceleration movement during the traditional linear processing is overcome, the path of a laser beam from a laser light source to the light guide plate is basically unchanged, the size and depth of mesh points processed at different positions of the light guide plate are basically consistent, and the processing efficiency and quality of the light guide plate are improved.
Preferably, in order to enable thefirst mirror group 32 to reflect the laser light emitted from the laser 2 onto the light guide plate during the rotation process, thefirst mirror group 32 includes arotating disc 321 and a plurality offirst mirror pieces 322, the plurality offirst mirror pieces 322 are sequentially connected and annularly fixed on therotating disc 321, and therotating disc 321 is connected with the output end of the driving mechanism 4 on a surface far away from thefirst mirror pieces 322. The plurality of firstreflective mirrors 322 are annularly formed, so that no matter what angle the firstreflective mirror 32 rotates to, the firstreflective mirror 32 can reflect the laser emitted by the laser 2 to the light guide plate, and the processing quality and efficiency of the light guide plate are improved.
As an embodiment of the first reflectingmirror group 32, as shown in fig. 2 and 3, the number of the first reflectingmirror pieces 322 is four, the four first reflectingmirror pieces 322 are sequentially connected to form an annular first reflectingmirror group 32, and the second reflectingmirror pieces 332 are disposed corresponding to the first reflectingmirror pieces 322.
The four first reflectingmirror plates 322 are arranged in a ring shape with a certain inclination angle, so that the reflecting surface of the next first reflectingmirror plate 322 is changed every time the first reflectingmirror plate 322 rotates 90 degrees; for the light guide plate, every time the firstreflective mirror 322 rotates 90 degrees, the light guide plate advances a set distance in a certain direction to complete the processing of a row of mesh points on the light guide plate.
The number of the firstreflective mirrors 322 is not limited to four, and may be one, two or more, and therotating disc 321 can process the same number of rows of dots as the firstreflective mirrors 322 every rotation.
Preferably, for the first reflectingmirror group 32 after optimization, in order to reflect the laser light reflected by the first reflectingmirror group 32 to the light guide plate, the second reflectingmirror group 33 includes a focusingmirror 331 and a secondreflecting mirror 332, and both the focusingmirror 331 and the second reflectingmirror 332 are adjustably fixed on theframe 7; the light incident end of the focusinglens 331 is fixedly connected to the light emitting end of the second reflectingmirror 332, and the light emitting end of the focusinglens 331 is disposed above the light guide plate. The focusinglens 331 and the second reflectinglens 332 may be fixed to theframe 7 by an adjustable bracket, and when the position of the focusinglens 331 or the second reflectinglens 332 needs to be changed, the focusinglens 331 or the second reflectinglens 332 may be directly pulled. Or the focusinglens 331 and the second reflectinglens 332 are slidably connected with theframe 7 through a fixed bracket, and the fixed bracket and theframe 7 can be connected through a guide rail to realize the movement of the focusinglens 331 or the second reflectinglens 332. Finally, the focusinglens 331 can be vertically height-adjustable and fixed, and the second reflectinglens 332 can be tilt-adjustable and fixed.
As an embodiment of thesecond mirror group 33, as shown in fig. 2, there are onesecond mirror 332 and one focusingmirror 331, thesecond mirror 332 and the focusingmirror 331 are both arc-shaped and their arc-shaped axes coincide with each other, the axes of thesecond mirror 332, the focusingmirror 331 and thefirst servo motor 41 coincide with each other, and the light-entering end of the focusingmirror 331 is disposed right below the light-exiting end of thesecond mirror 332; when the axis of thefirst servo motor 41 is fixed, the focusinglens 331 and the second reflectinglens 332 can move along the axis direction thereof to adjust the optical paths between the second reflectinglens 332 and the first reflectinglens 322, so that the laser can be stably transmitted from the first reflectinglens 322 to the second reflectinglens 332.
The focusinglens 331 focuses the divergent laser reflected by the second reflectingmirror 332, so that the laser is focused on the whole light guide plate, the non-uniform laser on the light guide plate is homogenized, and the capability of the edge beam of the laser to enter the light guide plate is improved.
Similarly, the secondreflecting mirror 332 and the focusingmirror 331 are not limited to one, and may be two or more, so as to mainly realize the transmission of the laser light reflected by the first reflectingmirror 322 to the dot position of the light guide plate.
Preferably, in order to realize stable rotation of the first reflectingmirror group 32, the driving mechanism 4 includes afirst servo motor 41 and aneccentric coupling 42, thefirst servo motor 41 is disposed below the rotatingdisc 321, and the output end is fixedly connected with the center of the rotatingdisc 321, and the first reflectingmirror group 32 is fixedly connected with the rotatingdisc 321 through theeccentric coupling 42.
In order to cooperate with the above-mentioned embodiment of thefirst mirror group 32 and thesecond mirror group 33, thefirst servo motor 41 is fixed on theframe 7, the output end of the first servo motor passes through the position right below the rotatingdisc 321 and is drivingly connected to theeccentric coupling 42, the rotating shaft 34 is disposed above thefirst mirror group 32, thefirst mirror group 32 rotates around the rotating shaft 34, theeccentric coupling 42 connects the output end of thefirst servo motor 41 and the rotating shaft 34 together, and thefirst servo motor 41 simultaneously drives therotating disc 321 and theeccentric coupling 42 to rotate, so that thefirst mirror group 32 realizes stable rotation.
Preferably, in order to enable the laser emitted by the laser 2 to smoothly reach thereflection mechanism 3, alaser adjustment mechanism 5 is further disposed between the laser 2 and thereflection mechanism 3, a laser input end of thelaser adjustment mechanism 5 is disposed corresponding to a laser output end of the laser 2, and a laser output end of the laser adjustment mechanism is disposed corresponding to a laser input end of thereflection mechanism 3.
Thelaser adjusting mechanism 5 includes an acousto-optic modulator 51 and athird mirror group 52 for reflecting the laser passing through the acousto-optic modulator 51 to thefirst mirror group 32, wherein the laser input end of the acousto-optic modulator 51 is arranged corresponding to the laser output end of the laser 2, and the laser output end is arranged corresponding to the laser input end of thethird mirror group 52.
After the laser emitted by the laser 2 passes through the acousto-optic modulator 51, the optical carrier of the laser is modulated to become an intensity modulation wave carrying information, so that the undistorted transmission of the laser is realized, and the accuracy of the laser entering the light guide plate is improved.
As an embodiment of thelaser adjusting mechanism 5, thethird mirror group 52 includes athird mirror 521, afourth mirror 522, afifth mirror 523, asixth mirror 524, and abeam dissipator 525, a laser input end of thethird mirror 521 is disposed corresponding to a laser output end of the acousto-optic modulator 51, a laser output end of thethird mirror 521 is disposed corresponding to a laser input end of thefourth mirror 522 and thefifth mirror 523, a laser output end of thefourth mirror 522 is disposed corresponding to a laser input end of thebeam dissipator 525, a laser output end of thefifth mirror 523 is disposed corresponding to a laser input end of thesixth mirror 524, and a laser output end of thesixth mirror 524 is connected to a laser input end of thefirst mirror group 32.
As shown in fig. 1, in order to cooperate with the processing of the light guide plate, not all the laser light emitted by the laser 2 is used, and when the light guide plate is processed at the processing interval in the processing process, the laser light emitted by the laser 2 passes through the modulation action of the acousto-optic modulator 52, and enters thebeam dissipater 525 through the reflection action of thethird reflector 521 and thefourth reflector 522 according to thefirst light path 6, so that the influence of the random scattering of the laser light on operators, working environment and the like is avoided; when the light guide plate is machined in the machining process, laser emitted by the laser 2 deviates a certain angle through the modulation effect of the acousto-optic modulator 52, so that the laser deviates from thefirst light path 6 and enters thefirst reflection mirror 322 of thereflection mechanism 3 along thesecond light path 9 through thethird reflection mirror 521, thefifth reflection mirror 523 and thesixth reflection mirror 524, and the machining of the light guide plate is realized.
A backlight module comprises a light guide plate processed by the processing device.
A light guide plate mesh point processing method based on arc reflection comprises the following steps:
s1: presetting a starting processing coordinate and an ending processing coordinate of each mesh point of the light guide plate, and presetting that the light guide plate moves forward a set distance when thefirst reflector group 32 rotates a set angle;
thefirst servo motor 41 drives thereflection mechanism 3 to rotate (X axis), the second servo motor drives the processing platform 1 carrying the light guide plate to move linearly (Y axis) on theframe 7, and the rotating speeds of thefirst servo motor 41 and the second servo motor and the line spacing of each dot of the light guide plate are set.
The laser 2 works, when the acousto-optic modulator 51 does not work, the laser enters thebeam dissipater 525 according to the firstlight path 6, and when the acousto-optic modulator 51 works, the laser enters the reflectingmechanism 3 according to the firstlight path 9, so that the photoetching of the lattice points on the surface of the light guide plate is realized.
S2: the driving mechanism 4 drives therotating disc 321 to rotate to a set rotating speed;
so that thefirst mirror group 32 and thesecond mirror group 33 on therotating disc 321 rotate stably at the same angular speed.
S3: the light guide plate moves to a first initial processing coordinate on the processing platform 1;
s4: when thefirst reflector group 32 rotates to a set angle, the laser emitted by the laser 2 is reflected onto the light guide plate by thefirst reflector group 32 and thesecond reflector group 33, and the laser 2 stops emitting laser until the light guide plate moves to the coordinate where processing is finished;
s5: therotating disc 321 is rotated circularly, and when the processing of the dots on the light guide plate is completed, the light guide plate is reset to the original set position, so that the processing of the dots on the light guide plate is completed.
Specifically, as shown in fig. 4, for the processing of the first row of dots on the light guide plate: starting and stopping the acousto-optic modulator 51 according to the initial processing coordinate and the end processing coordinate set by the first mesh point, namely starting the acousto-optic modulator 51 when the initial processing coordinate is set, and stopping running the acousto-optic modulator 51 when the end processing coordinate is set; during the operation of the acousto-optic modulator 51, the reflection path of the laser deviates from the original firstoptical path 6, and the secondoptical path 9 is selected to enter one of thefirst reflection lenses 322, and then reaches the light guide plate through the focusinglens 331 to perform the dot processing, until the processing coordinate is finished, the operation of the acousto-optic modulator 51 is stopped, and the first line processing of the light guide plate is realized.
As shown in fig. 5, the processing of the subsequent dots: the second servo motor drives the light guide plate to move forward on the processing platform 2 by a distance of a line spacing, the distance of the line spacing corresponds to the spacing between the dots of each line, and meanwhile, thefirst reflector group 32 rotates to a next processing angle, and processing is performed according to the processing process of the first dot until processing of all the dots is completed.
In this embodiment, therotating disc 321 rotates 90 degrees, the firstreflective mirror 322 is switched to complete the photolithography of one row of dots on the light guide plate, the light guide plate moves forward by a set distance under the driving of the second servo motor to perform the photolithography of the next row of dots on the light guide plate, and after therotating disc 321 rotates one circle, the photolithography of four rows of dots on the light guide plate is completed; therotating disc 321 is rotated circularly until the photo-etching of all the rows of the mesh points on the light guide plate is completed, the light guide plate is reset to the original set position, and the next light guide plate is replaced for photo-etching.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (10)
1. A light guide plate mesh point processing device based on arc reflection comprises a rack (7) and a processing platform (1) for fixing a light guide plate, wherein the processing platform (1) is arranged on the rack (7) and movably connected with the rack (7), and is characterized in that the rack (7) is also provided with a laser (2), a reflecting mechanism (3) for reflecting laser emitted by the laser (2) onto the light guide plate and a driving mechanism (4) for driving the reflecting mechanism (3) to rotate;
the reflecting mechanism (3) comprises a first reflecting mirror group (32) used for reflecting laser emitted by the laser (2) and a second reflecting mirror group (33) used for reflecting the laser reflected by the first reflecting mirror group (32), the output end of the driving mechanism (4) is in driving connection with the first reflecting mirror group (32), and the second reflecting mirror group (33) is fixed on the rack (7).
2. The light guide plate mesh processing device based on arc reflection as claimed in claim 1, wherein the first reflector group (32) comprises a rotating disc (321) and a plurality of first reflector plates (322), the plurality of first reflector plates (322) are sequentially connected and annularly fixed on the rotating disc (321), and the rotating disc (321) is connected with the output end of the driving mechanism (4) on a surface far away from the first reflector plates (322).
3. The light guide plate mesh processing device based on arc reflection of claim 2, wherein the second reflector set (33) comprises a focusing lens (331) and a second reflector (332), and both the focusing lens (331) and the second reflector (332) are adjustably fixed on the frame (7);
the light inlet end of the focusing lens (331) is fixedly connected with the light outlet end of the second reflector (332), and the light outlet end of the focusing lens (331) is arranged above the light guide plate.
4. The light guide plate mesh processing device based on arc reflection of claim 2, wherein the driving mechanism (4) comprises a first servo motor (41) and an eccentric coupling (42), the first servo motor (41) is arranged below the rotating disc (321), and the output end is fixedly connected with the center of the rotating disc (321), the first reflecting mirror group (32) is fixedly connected with the rotating disc (321) through the eccentric coupling (42);
the focusing lens (331) and the second reflector (332) are both arc lenses, the axes of the focusing lens (331), the second reflector (332) and the first servo motor (41) are overlapped, and the light inlet end of the focusing lens (331) is arranged right below the light outlet end of the second reflector (332).
5. The light guide plate mesh point processing device based on arc reflection according to any one of claims 1-4, wherein a laser adjusting mechanism (5) is further disposed between the laser (2) and the reflecting mechanism (3), a laser input end of the laser adjusting mechanism (5) is disposed corresponding to a laser output end of the laser (2), and a laser output end is disposed corresponding to a laser input end of the reflecting mechanism (3).
6. The light guide plate mesh point processing device according to claim 5, wherein the laser adjusting mechanism (5) comprises an acousto-optic modulator (51) and a third reflector set (52) for reflecting the laser light passing through the acousto-optic modulator (51) to the first reflector set (32), the laser input end of the acousto-optic modulator (51) is arranged corresponding to the laser output end of the laser (2), and the laser output end is arranged corresponding to the laser input end of the third reflector set (52).
7. The light guide plate mesh point processing device of claim 6, wherein the third reflector set (52) comprises a third reflector (521), a fourth reflector (522), and a fifth reflector (523), the laser output end of the third reflector (521) corresponds to the laser input ends of the fourth reflector (522) and the fifth reflector (523), the laser output end of the fourth reflector (522) corresponds to the laser input end of the beam dissipater (525), the laser output end of the fifth reflector (523) corresponds to the laser input end of the sixth reflector (524), and the laser output end of the sixth reflector (524) is connected with the laser input end of the first reflector set (32).
8. The light guide plate mesh point processing device of claim 7, wherein the number of the first reflective mirrors (322) is four, and the four first reflective mirrors (322) are sequentially connected to form a ring-shaped first reflective mirror group (32).
9. A backlight module comprising a light guide plate processed by the processing apparatus of any one of claims 1 to 8.
10. A light guide plate mesh point processing method based on arc reflection is characterized by comprising the following steps:
presetting a starting processing coordinate and an ending processing coordinate of each mesh point of the light guide plate, and presetting a set distance for the light guide plate to move forwards when the first reflector group (32) rotates a set angle;
the driving mechanism (4) drives the rotating disc (321) to rotate to a set rotating speed;
the light guide plate moves to a first initial processing coordinate along with the processing platform (1);
the first reflector group (32) rotates to a set angle, laser emitted by the laser (2) is reflected to the light guide plate through the first reflector group (32) and the second reflector group (33), and the laser (2) stops emitting the laser until the light guide plate moves to the coordinate of finishing machining;
and circularly rotating the rotating disc (321), and after the mesh points on the light guide plate are processed, resetting the processing platform (1) to the original set position to complete the processing of the mesh points on the light guide plate.
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| CN111168248B (en) | 2022-04-08 |
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