Light guide plate and light guide plate preparation method

Abstract

A light guide plate and a method for preparing the light guide plate. An optical microstructure that is continuous or discontinuous is provided on the light-emitting surface of the light guide plate. The optical microstructure has a shape similar to a "凵" shape. The optical microstructure is parallel to the light-emitting surface of the light guide plate. The optical microstructure protrudes and / or depresses on the light guide plate. The cross section of the optical microstructure has a V-shaped structure or a rectangular structure. The optical microstructure includes a first horizontal segment. One end of the first horizontal segment is provided with a first vertical segment. The other end of the first vertical segment is provided with a second horizontal segment. The other end of the second horizontal segment is provided with a second vertical segment. A first included angle is formed between the first horizontal segment and the first vertical segment. A second included angle is formed between the first vertical segment and the second horizontal segment. A third included angle is formed between the second horizontal segment and the second vertical segment. By forming an optical microstructure with a shape similar to a "凵" shape on the light guide plate, the light shielding and atomization effects of the light guide plate are improved, and it has strong practicality. The method for preparing the light guide plate is used for preparing the above light guide plate.

Description

Technical Field

[0001] The present invention relates to the technical field of optical thin films, and particularly to a light guide plate and a method for preparing the light guide plate. Background Art

[0002] With the evolution of the application of optical microstructures in TFT LCD displays or backlight panel technologies, TFT LCD displays or backlight modules / backlight panels with high contrast, high color rendering, and thin form factors have become the focus of research and development. At present, there are the following problems in the production of TFT LCD displays or backlight modules / backlight panels: dot-like or line-like defects appear on the screen of the TFT LCD display or backlight panel. This is because during the production process of the TFT LCD display or backlight panel, due to a dirty production environment, poor equipment processing, or human factors, these adverse effects are likely to cause dot-like or line-like defects on the screen. The general improvement solution is to strengthen the cleanliness of the production environment or personnel education and training, but this method is not a direct improvement and the effect is limited. Therefore, how to correct the defects through the structural design of the light guide plate has become an urgent technical problem to be solved.

[0003] In addition, when forming an optical thin film using the currently adopted technical process, especially when forming an optical microstructure thereon, the roll forming method is usually used. This method is likely to cause deformation of the optical microstructure when separating from the roll after forming, which will have a certain impact on the performance of the light guide plate. Summary of the Invention

[0004] The present invention provides a light guide plate and a method for preparing the light guide plate to solve the above-mentioned deficiencies of the prior art. By providing an optical microstructure on the light guide plate, the concealer and atomization effects of the light guide plate are improved. In addition, a method for facilitating the formation of the optical microstructure is also provided.

[0005] In order to achieve the object of the present invention, the following technologies are proposed:

[0006] A light guide plate is provided, and a continuous or discontinuous optical microstructure is provided on the light-emitting surface of the light guide plate, and the optical microstructure has a U-shaped structure.

[0007] Further, the optical microstructure is parallel to the light-emitting surface of the light guide plate.

[0008] Further, the optical microstructure protrudes and / or depresses on the light guide plate.

[0009] Further, the cross-section of the optical microstructure has a V-shaped structure and / or a rectangular structure and / or an arc-shaped structure.

[0010] Furthermore, the optical microstructure includes a first horizontal segment, a first vertical segment is provided at one end of the first horizontal segment, a second horizontal segment is provided at the other end of the first vertical segment, a second vertical segment is provided at the other end of the second horizontal segment, a first angle is formed between the first horizontal segment and the first vertical segment, a second angle is formed between the first vertical segment and the second horizontal segment, and a third angle is formed between the second horizontal segment and the second vertical segment.

[0011] Furthermore, the length of the first vertical segment and the second vertical segment is less than or equal to 0.1 mm.

[0012] Furthermore, the lengths of the first transverse segment and the second transverse segment are greater than or equal to 10 μm.

[0013] Furthermore, the first angle, the second angle and the third angle are in the range of 88° to 92°.

[0014] In addition, a method for preparing a light guide plate is provided, which is used for preparing the light guide plate, comprising the steps of:

[0015] It uses an embossing device to press and form the optical microstructure;

[0016] An upper template is provided which moves up and down, and a lower wall of the upper template has a plurality of protrusions for forming optical microstructures;

[0017] A lower template is provided, the lower template is fixedly arranged, and the upper wall of the lower template is a plane;

[0018] During preparation, the upper template acts on the upper side of the light guide plate to form an optical microstructure on the light emitting surface of the light guide plate.

[0019] Furthermore, the embossing device comprises a supporting mechanism, a pressing mechanism is provided on the supporting mechanism, a connecting mechanism is provided at each end of the pressing mechanism, an upper template is provided at the lower end of the connecting mechanism, and a conveying mechanism is connected to the lower end of the connecting mechanism;

[0020] The supporting mechanism comprises a bottom plate, a lower template is arranged on the upper side of the bottom plate, lower through rods are arranged downwardly at the four corners of the lower template, the lower ends of the lower through rods are arranged with connecting pins, the lower through rods are all passed through the bottom plate, a pair of adjusting end seats are installed on the lower side of the bottom plate, a pair of connecting guide rods are arranged between the adjusting end seats, an adjusting screw rod is also arranged between the adjusting end seats, the threads at both ends of the adjusting screw rod are rotated in opposite directions, a concave moving part is respectively arranged at both ends of the adjusting screw rod, the lower wall of the concave moving part is an inclined surface, the inner end of the inclined surface is a small end, and a sliding block is respectively installed on both sides of each concave moving part, The sliding blocks are sleeved on the connecting guide rods, and the bottom plate is provided with two pairs of downward extension guide rods extending downward, and each pair of downward extension guide rods is sleeved with a lower top plate, and the lower top plates are connected and fixed by a concave piece, and a push-down concave piece is provided at the middle position of the upper side of the concave piece, and the two sides of the push-down concave piece are formed with a second inclined surface, and the outer ends of the second inclined surfaces are inclined downward, and the second inclined surfaces match the inclined surfaces, and rotating pins are provided at both ends of each lower top plate, and rotating plates are rotatably provided on the rotating pins, and arc-shaped slots are provided at the outer ends of the rotating plates, and the connecting pins are all inserted into the arc-shaped slots;

[0021] The pressing mechanism includes mounting convex plates mounted on both sides of the bottom plate, a door frame is mounted on the mounting convex plates, a pair of rotating seats are mounted on the upper ends of the door frames, rotating discs are eccentrically provided on the upper ends of the rotating seats through connecting shafts, outer rings are sleeved outside the rotating discs, the outer rings are connected by a connecting plate, an eccentric shaft is provided on the rotating discs, the eccentric shaft is coaxial with the connecting shaft, a swing plate is rotatably connected to the eccentric shaft, the other end of the swing plate is connected to a reciprocating plate through a rotating shaft, a reciprocating sleeve is sleeved on the reciprocating plate, a motor is connected to one of the connecting shafts, the motor is mounted on one of the rotating seats, and a middle connecting plate is installed at the lower end of the reciprocating sleeve;

[0022] The connecting mechanism includes a lifting sleeve installed at the end of the middle connecting plate. A guiding member is provided inside the lifting sleeve, and the guiding member is installed at the upper end of the gantry. A lifting plate is installed on the lifting sleeve. An installation plate is provided at the lower end of the lifting plate. A folded fixed plate is installed on the installation plate. The upper template is installed on the folded fixed plate. A lower rotating column is rotatably provided at the lower end of the lifting plate. An inner ring is installed at the inner end of the lower rotating column through a pin. A pair of adjusting protrusions are provided on the inner ring. An outer extension frame is installed on one side of the lifting plate. A movement hole runs through the outer extension frame from top to bottom. An adjusting block is provided inside the outer extension frame. Both the upper and lower ends of the adjusting block pass through the movement hole. A lead screw is provided on the adjusting block. Both ends of the lead screw are rotatably provided on the outer extension frame, and a rotating head is provided at the outer end of the lead screw. A rotating inner shaft is provided on the adjusting block. A deflecting plate is connected to the rotating inner shaft. The other end of the deflecting plate is provided with a concave deflecting plate. The adjusting protrusion passes through the concave deflecting plate. An outer disc is provided at the outer end of the lower rotating column. An inclined plate is provided on the outer wall of the outer disc. The length direction of the inclined plate is parallel to the length direction of the concave deflecting plate. A rotating turntable is sleeved at the lower end of the inclined plate. A through groove is formed at the inner end of the rotating turntable. The lower end of the inclined plate passes through the through groove. A pair of arc rings are sleeved at the outer end of the rotating turntable. Extension support plates are provided on both arc rings. A guiding sleeve is sleeved on the extension support plates. The guiding sleeve is installed on the bottom plate through an installation side plate. The other end of the extension support plate is installed with a round head convex plate;

[0023] The conveying mechanism includes a guide rail installed on the upper side of the bottom plate. A guiding groove is formed in an open manner on the inner side wall of the guide rail. A conveying guide member is provided in the guiding groove. A folded bottom plate is provided at the inner end of the conveying guide member. An upper extension side plate extends upward at the outer end of the folded bottom plate. An inner extension convex plate extends inward at the upper end of the upper extension side plate. A telescopic pin passes through the inner end of the inner extension convex plate. A spring is sleeved at the upper end of the telescopic pin. A lower convex plate is provided at the lower end of the telescopic pin. A movable side plate is provided on the lower convex plate. An upper pressing plate is provided at the lower end of the movable side plate. An inclined hole is formed in the movable side plate. A horizontal hole in a horizontal state is formed at the upper end of the upper extension side plate. The inner end of the inclined hole slopes downward. A movable rod passes through the inclined hole. The outer end of the movable rod passes through the horizontal hole and is installed on the round head convex plate.

[0024] The advantages of the above technical solutions are as follows:

[0025] Compared with the prior art, in the present invention, by forming optical microstructures in a continuous or discontinuous "U"-shaped structure on the light guide plate, the concealer and atomization effects of the light guide plate are improved. In addition, a stable and efficient method for preparing the light guide plate is specifically proposed. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the drawings.

[0027] Figure 1 The three-dimensional structure diagram of Embodiment 2 is shown.

[0028] Figure 2 A three-dimensional structural diagram of Example 3 is shown.

[0029] Figure 3 A three-dimensional structural diagram of Example 4 is shown.

[0030] Figure 4 A structural diagram of a single optical microstructure of Example 4 is shown.

[0031] Figure 5 A comparison diagram of the implementation effects of Examples 1 to 4 is shown.

[0032] Figure 6 A comparison diagram of the specific implementations in Example 3 and Example 4 is shown.

[0033] Figure 7 A comparison diagram of light path propagation in Example 3 and Example 4 is shown.

[0034] Figure 8 A three-dimensional structural diagram of the embossing device is shown.

[0035] Fig. 9 A three-dimensional structural diagram of the support mechanism is shown.

[0036] Fig.10 An enlarged view of A is shown.

[0037] Fig.11 A three-dimensional structural diagram of a portion of the support mechanism is shown.

[0038] Fig.12 A three-dimensional structural diagram of another part of the support mechanism is shown.

[0039] Fig.13 A three-dimensional structural diagram of the pressing mechanism is shown.

[0040] Fig.14 Shows the three-dimensional structure of the connection mechanism and the conveying mechanism Figure 1 .

[0041] Fig.15 Shows the three-dimensional structure of the connection mechanism and the conveying mechanism Figure 2 .

[0042] Fig.16 Shows the three-dimensional structure of the connection mechanism and the conveying mechanism Figure 3 .

[0043] Fig.17 Shows the three-dimensional structure of the conveying mechanism Figure 1 .

[0044] Fig.18 Shows the three-dimensional structure of the conveying mechanism Figure 2 . Detailed implementation manners

[0045] Example 1

[0046] A light guide plate without optical microstructures thereon.

[0047] Example 2

[0048] As Figure 1 shown, a light guide plate is provided with a plurality of linear optical microstructures 10 thereon. The optical microstructures protrude from or are recessed in the light guide plate, and the cross-section of the optical microstructures is a V-shaped structure and / or a rectangular structure and / or an arc-shaped structure.

[0049] Example 3

[0050] As Figure 2 shown, a light guide plate is provided with a plurality of wavy optical microstructures 20 thereon, and it can be understood that the wavy optical microstructures are formed by connecting a plurality of V-shaped structures end to end. The optical microstructures protrude from or are recessed in the light guide plate, and the cross-section of the optical microstructures is a V-shaped structure and / or a rectangular structure and / or an arc-shaped structure.

[0051] Example 4

[0052] As Figure 3~Figure 4 shown, a light guide plate is provided with continuous or discontinuous optical microstructures 30 on the light-emitting surface thereof. The optical microstructures are in a shape similar to a "凵" shape. The optical microstructures are parallel to the light-emitting surface of the light guide plate. The optical microstructures protrude and / or are recessed in the light guide plate. The cross-section of the optical microstructures is a V-shaped structure and / or a rectangular structure and / or an arc-shaped structure.

[0053] The optical microstructures include a first horizontal segment 1b. One end of the first horizontal segment 1b is provided with a first vertical segment 1c. The other end of the first vertical segment 1c is provided with a second horizontal segment 1d. The other end of the second horizontal segment 1d is provided with a second vertical segment 1e. A first included angle 1a is formed between the first horizontal segment 1b and the first vertical segment 1c. A second included angle 1h is formed between the first vertical segment 1c and the second horizontal segment 1d. A third included angle 1g is formed between the second horizontal segment 1d and the second vertical segment 1e. The lengths of the first vertical segment 1c and the second vertical segment 1e are less than or equal to 0.1 mm. The lengths of the first horizontal segment 1b and the second horizontal segment 1d are greater than or equal to 10 μm. The angles of the first included angle 1a, the second included angle 1h, and the third included angle 1g are 88° - 92°.

[0054] As Figure 5As shown in the figure, it is not difficult to find from the figure that the light guide plate without optical microstructure in Example 1 basically does not have the functions of concealing defects and atomization. Although the light guide plate with linear optical microstructure in Example 2 has certain effects of concealing defects and atomization, the concealing effect between the optical microstructures is poor, and at the same time, for relatively large defect points, the boundary lines are relatively clear. Therefore, its concealing effect, of course, has a certain improvement compared with the concealing effect in Example 1. For the light guide plate with wavy optical microstructure in Example 3, it has a concealing effect to a certain extent, and it can be seen that smaller defect points are atomized. For relatively large defect points, although it has a certain atomization and blurring effect on the boundary of the defect points, it does not show a relatively obvious concealing effect. In Example 4, when using an optical microstructure in the shape of a "U", the defect point boundary basically disappears, showing an excellent concealing effect.

[0055] Comparing Example 3 and Example 4, and with the help of Figure 6 it can be known that if the optical microstructures in Example 3 and Example 4 are set with the same length and width. From Figure 6 it can be learned that the number of optical microstructures proposed in Example 4 is more than that of the wavy or R-shaped ones. And the more the number of optical microstructures, the more times the light is reflected and refracted, and the better the light source diffusion. And the light source diffusion helps the concealing effect.

[0056] Comparing Example 3 and Example 4, and with the help of Figure 7 it can be known that if the optical microstructures in Example 3 and Example 4 are set with the same length and width. From Figure 7 it can be concluded that the straight light path of Example 4 is better than that of the wavy or R-shaped ones, and the light is more likely to propagate from the incident end to the end of the light path, thereby improving the light utilization rate from the near light source to the far light source, and further realizing better adjustment of the light. And the optical microstructure proposed in Example 3 is significantly not conducive to the propagation of light at the circled position. To sum up, the concealing effect of the optical microstructure proposed in Example 4 is better than that of the optical microstructure proposed in Example 3.

[0057] Example 5

[0058] As Figures 8 to 18 shown, a embossing device includes a support mechanism 1, a pressing mechanism 3 is provided on the support mechanism 1, a connecting mechanism 4 is provided at each end of the pressing mechanism 3, an upper template 5 is provided at the lower end of the connecting mechanism 4, and a conveying mechanism 6 is also connected to the lower end of the connecting mechanism 4 respectively;

[0059] The supporting mechanism 1 includes a bottom plate 100, a lower template 101 is provided on the upper side of the bottom plate 100, and lower through rods 102 are provided at the four corners of the lower template 101 extending downward, and the lower ends of the lower through rods 102 are provided with connecting pins 103, and the lower through rods 102 are all passed through the bottom plate 100. A pair of adjusting end seats 104 are installed on the lower side of the bottom plate 100, and a pair of connecting guide rods 105 are provided between the adjusting end seats 104. An adjusting screw rod 106 is also provided between the adjusting end seats 104, and the threads at both ends of the adjusting screw rod 106 are rotated in opposite directions. A concave moving part 107 is respectively provided at both ends of the adjusting screw rod 106, and the lower wall of the concave moving part 107 is an inclined surface 108, and the inner end of the inclined surface 108 is a small end. A sliding block 109 is respectively installed on both sides of each concave moving part 107. The sliding blocks 109 are all sleeved on the connecting guide rods 105, and the bottom plate 100 is extended downwardly to be provided with two pairs of lower extension guide rods 110, and each pair of lower extension guide rods 110 is sleeved with a lower top plate 111, and the lower top plates 111 are connected and fixed by a concave piece 115, and a push-down concave piece 116 is provided at the middle position of the upper side of the concave piece 115, and second inclined surfaces 117 are formed on both sides of the push-down concave piece 116, and the outer ends of the second inclined surfaces 117 are inclined and extended downward, and the second inclined surfaces 117 match the inclined surfaces 108, and rotating pins 112 are extended downward at both ends of each lower top plate 111, and rotating plates 113 are rotatably provided on the rotating pins 112, and arc-shaped slots 114 are opened at the outer ends of the rotating plates 113, and the connecting pins 103 are all passed through the arc-shaped slots 114.

[0060] The lower template 101 is designed to be detachable, which is convenient for cleaning and maintenance, and avoids the influence on the preparation of the light guide plate due to the increase of its surface roughness during the long-term embossing process. This influence is mainly because the lower wall of the upper template 5 has a blade-like structure, which has an adverse effect on its upper wall during the long-term embossing process.

[0061] When replacing or disassembling, the operator rotates the adjusting screw 106, so that the adjusting screw 106 drives the two concave moving parts 107 to move outward, and the outward movement of the concave moving parts 107 will cause the inclined surface 108 to gradually cancel the effect of the second inclined surface 117, and then the operator rotates each rotating plate 113 and removes the connecting pin 103 from the slot 114, and then replaces or repairs the lower template 101. After the replacement of the lower template 101 is completed. During installation, the operator first rotates each rotating plate 113 so that the connecting pin 103 is inserted into the slot 114. Then the operator rotates the adjusting screw 106, and the concave moving part 107 moves inward under the rotation of the adjusting screw 106. When the concave moving part 107 moves inward, the concave part 115 drives each rotating plate 113 to move downward, and the rotating plate 113 pulls the lower template 101 to complete the fixing operation of the lower template 101.

[0062] The pressing mechanism 3 includes a mounting convex plate 300 mounted on both sides of the bottom plate 100, a door frame 301 is mounted on the mounting convex plate 300, a pair of rotating seats 302 are mounted on the upper end of the door frame 301, and the upper end of the rotating seat 302 is eccentrically provided with a rotating disk 303 through a connecting shaft, and the outer ring 305 is sleeved on the rotating disk 303, and the outer rings 305 are connected by a connecting plate 306, and an eccentric shaft is provided on the rotating disk 303, and the eccentric shaft is coaxial with the connecting shaft, and a swing plate 307 is rotatably connected on the eccentric shaft, and the other end of the swing plate 307 is connected to a reciprocating plate 308 through a rotating shaft, and a reciprocating sleeve 309 is sleeved on the reciprocating plate 308, and a motor 304 is connected to one of the connecting shafts, and the motor 304 is mounted on one of the rotating seats 302, and a middle connecting plate 310 is installed on the lower end of the reciprocating sleeve 309. This method can efficiently complete the embossing operation of the original film.

[0063] The connection mechanism 4 includes a lifting sleeve 401 installed at the end of the middle connecting plate 310, a guide member 400 is arranged in the lifting sleeve 401, and the guide member 400 is installed at the upper end of the door frame 301. A lifting plate 402 is installed on the lifting sleeve 401, and a mounting plate 403 is arranged at the lower end of the lifting plate 402. A folding fixed plate 404 is installed on the mounting plate 403, and the upper template 5 is installed on the folding fixed plate 404. A lower rotating column 415 is rotatably arranged at the lower end of the lifting plate 402, and the lower rotating column 415 is rotatably arranged at the lower end of the lifting plate 402. 5 is provided with an inner ring 414 through a pin, and a pair of adjusting protrusions 413 are provided on the inner ring 414. An outrigger frame 405 is provided on one side of the lifting plate 402, and a movement hole 406 is passed through the outrigger frame 405 from top to bottom. An adjusting block 409 is provided in the outrigger frame 405, and the upper and lower ends of the adjusting block 409 are both passed through the movement hole 406. A screw rod 407 is provided on the adjusting block 409, and both ends of the screw rod 407 are rotatably provided on the outrigger frame 405, and the screw rod 407 The outer end of the lower rotating column 415 is provided with an outer disk 416, and the outer wall of the outer disk 416 is provided with an inclined plate 417, and the length direction of the inclined plate 417 is parallel to the length direction of the concave deflection plate 412. The lower end of the rotating table 418 is sleeved with a rotating table 418, the inner end of the rotating table 418 is provided with a through groove, the lower end of the inclined plate 417 is inserted into the through groove, and the outer end of the rotating table 418 is sleeved with a pair of arc circles 419, and the arc circles 419 are provided with extended support plates 420, the extended support plates 420, and the extended support plates 420 are sleeved with guide sleeves 421, which are installed on the bottom plate 100 by installing side plates 422, and the other end of the extended support plates 420 is installed with round head convex plates 423.

[0064] Among them, in order to meet actual needs such as the density of embossing and the feed amount of the original film, the inclined plate 417 is set to be angle-adjustable. When adjusting the inclination angle of the inclined plate 417 in actual operation, the operator rotates the screw rod 407 by turning the head 408, and the rotation of the screw rod 407 will drive the adjustment block 409 to move along the motion control 406, and when the adjustment block 409 moves outward, the lower end of the inclined plate 417 rotates upward, and when the adjustment block 409 moves inward, the lower end of the inclined plate 417 will rotate downward. Of course, this rotation is transmitted through the concave deflection plate 412 and the adjustment protrusion 413.

[0065] The lower wall of the upper mold plate of the upper mold plate 5 has a plurality of protrusions for forming optical microstructures, and the cross-section of the protrusions is a V-shaped structure and / or a rectangular structure and / or an arc-shaped structure.

[0066] The conveying mechanism 6 includes a guide rail 600 installed on the upper side of the bottom plate 100, the inner side wall of the guide rail 600 is formed with a guide groove 601, a conveying guide is arranged in the guide groove 601, the inner side end of the conveying guide is provided with a folding bottom plate 602, the outer side end of the folding bottom plate 602 is extended upwardly to provide an upper extension side plate 603, the upper end of the upper extension side plate 603 is extended inwardly to provide an inwardly extending convex plate 604, the inner side end of the inwardly extending convex plate 604 is penetrated with a telescopic pin 605, and the upper end of the telescopic pin 605 is sleeved with an elastic The lower end of the telescopic pin 605 is provided with a lower convex plate 607, a movable side plate 608 is provided on the lower convex plate 607, an upper pressing plate 611 is provided at the lower end of the movable side plate 608, an oblique hole 610 is provided on the movable side plate 608, a horizontal hole 609 in a horizontal state is provided at the upper end of the upper extension side plate 603, the inner side end of the oblique hole 610 is inclined downward, a movable rod is passed through the oblique hole 610, the outer side end of the movable rod is passed through the horizontal hole 609, and the movable rod is installed on the round head convex plate 423. Among them, the setting of the spring 606 can make the upper pressing plate 611 move upward, thereby facilitating the cancellation of the clamping during transportation.

[0067] The preparation method of the light guide plate in this embodiment is as follows:

[0068] Step 1, preparing a film for preparing a light guide plate by extruding an original film, calendering the original film, cooling the original film, preheating the original film, and the like;

[0069] Step 2, the preheated original film passes through the pressing mechanism 3 and the conveying mechanism 6 in sequence, and the light guide plate is conveyed under the pulling of the conveying mechanism 6;

[0070] Step 3, when the original film passes through the pressing mechanism 3 under the pulling of the conveying mechanism 6, the pressing mechanism 3 performs an embossing operation on the original film;

[0071] During embossing, the motor 304 drives the rotating disk 303 connected thereto to rotate, and the rotating disk 303 will rotate the other rotating disk 303 through the connecting plate 306, and the rotation of the two rotating disks 303 will drive the swinging plate 307 to rotate around the eccentric axis, and the rotation of the swinging plate 307 will drive the middle connecting plate 310 to reciprocate along its length direction, and also drive the reciprocating sleeve 309 to move up and down, and when the reciprocating sleeve 309 moves up and down, it will drive the two lifting plates 402 to move up and down along the vertical direction of the guide member 400, and when the lifting plate 402 moves downward, it will drive the upper template 5 to move downward, and act on the original film directly below the upper template 5, and extrude the optical microstructure described in Example 3 on the original film.

[0072] When the lifting plate 402 moves upward, the upper template 5 is away from the original film. At this time, since the lifting plate 402 moves upward, the inclined plate 417 acts on the groove of the rotating table 418, so that the rotating table 418 moves forward, and when the rotating table 418 moves forward, it will drive the extended support plate 420 to move forward. At the same time, when the extended support plate 420 moves forward, the movable rod will first move forward along the horizontal hole 609 under the pushing action, and the movable rod will act on the inclined hole 610 when moving forward, so that the movable side is moved forward under the action of the movable rod. Plate 608 moves downward, and during the movement, the spring 606 is compressed. When the movable side plate 608 moves downward, the upper pressure plate 611 moves downward and completes the clamping of the original film. After that, it will move forward under the continuous push of the extension support plate 420, and make the original film move forward a predetermined distance. Then the upper template 5 moves downward and embosses the original film again. At the same time, during the film pressing process, the extension support plate 420 moves backward, and makes the upper pressure plate 611 cancel the clamping of the original film. At the same time, the upper pressure plate 611 moves to the initial position driven by the extension support plate 420.

[0073] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A method for preparing a light guide plate, wherein a continuous or discontinuous optical microstructure is provided on the light-emitting surface of the light guide plate, and the optical microstructure has a shape similar to a "凵" shape, characterized in that, Includes steps: It uses an embossing device to press and form the optical microstructure; An upper template is provided which moves up and down, and a lower wall of the upper template has a plurality of protrusions for forming optical microstructures; A lower template is provided, the lower template is fixedly arranged, and the upper wall of the lower template is a plane; During preparation, the upper template acts on the upper side of the light guide plate to form an optical microstructure on the light emitting surface of the light guide plate; The embossing device comprises a supporting mechanism (1), a pressing mechanism (3) is provided on the supporting mechanism (1), a connecting mechanism (4) is provided at each end of the pressing mechanism (3), an upper template (5) is provided at the lower end of the connecting mechanism (4), and a conveying mechanism (6) is further connected to the lower end of the connecting mechanism (4); The support mechanism (1) comprises a bottom plate (100), a bottom template (101) is provided on the upper side of the bottom plate (100), bottom through rods (102) are provided at four corners of the bottom template (101) extending downward, the bottom through rods (102) are provided with connecting pins (103) at the lower ends, the bottom through rods (102) are all passed through the bottom plate (100), a pair of adjustment end seats (104) are installed on the lower side of the bottom plate (100), a pair of connecting guide rods (105) are provided between the adjustment end seats (104), an adjustment screw rod (106) is also provided between the adjustment end seats (104), the screw threads at both ends of the adjustment screw rod (106) are in opposite directions, a concave moving part (107) is provided at each end of the adjustment screw rod (106), the lower wall of the concave moving part (107) is an inclined surface (108), the inner end of the inclined surface (108) is a small end, and a sliding block (109) is installed at both sides of each concave moving part (107) The sliding blocks (109) are sleeved on the connecting guide rods (105), the bottom plate (100) is provided with two pairs of lower extension guide rods (110) extending downward, each pair of lower extension guide rods (110) is sleeved with a lower top plate (111), the lower top plates (111) are connected and fixed by a concave member (115), a push-down concave member (116) is provided at the middle position of the upper side of the concave member (115), and a second push-down concave member (116) is formed on both sides of the push-down concave member (116). The outer ends of the second inclined surface (117) and the second inclined surface (117) are both inclined and extended downward, the second inclined surface (117) matches the inclined surface (108), both ends of each lower top plate (111) are provided with rotating pins (112) extending downward, a rotating plate (113) is rotatably provided on the rotating pin (112), the outer ends of the rotating plates (113) are each provided with an arc-shaped slot (114), and the connecting pins (103) are each inserted into the arc-shaped slot (114); The pressing mechanism (3) comprises mounting convex plates (300) mounted on both sides of the bottom plate (100), a door frame (301) being mounted on the mounting convex plates (300), a pair of rotating seats (302) being mounted on the upper ends of the door frames (301), a rotating disk (303) being eccentrically provided at the upper ends of the rotating seats (302) via a connecting shaft, an outer ring (305) being sleeved on the outer sides of the rotating disks (303), the outer rings (305) being connected via a connecting plate (306), and the rotating disks ( An eccentric shaft is provided on each of the two connecting shafts (303), the eccentric shaft is coaxial with the connecting shaft, a swing plate (307) is rotatably connected to each of the two connecting shafts, the other end of the swing plate (307) is connected to a reciprocating plate (308) via a rotating shaft, a reciprocating sleeve (309) is sleeved on the reciprocating plate (308), a motor (304) is connected to one of the connecting shafts, the motor (304) is mounted on one of the rotating seats (302), and a middle connecting plate (310) is mounted on the lower end of the reciprocating sleeve (309); The connection mechanism (4) comprises a lifting sleeve (401) mounted on the end of the middle connecting plate (310), a guide member (400) is arranged in the lifting sleeve (401), the guide member (400) is mounted on the upper end of the door frame (301), a lifting plate (402) is mounted on the lifting sleeve (401), a mounting plate (403) is arranged at the lower end of the lifting plate (402), a folding fixing plate (404) is mounted on the mounting plate (403), an upper template (5) is mounted on the folding fixing plate (404), a lower rotating column (415) is rotatably arranged at the lower end of the lifting plate (402), and the lower rotating column ( An inner ring (414) is installed at the inner side end of the lifting plate (402) through a pin, and a pair of adjusting protrusions (413) are provided on the inner ring (414). An extension frame (405) is installed on one side of the lifting plate (402). A movement hole (406) is passed through the extension frame (405) from top to bottom. An adjusting block (409) is provided in the extension frame (405). The upper and lower ends of the adjusting block (409) are both passed through the movement hole (406). A screw rod (407) is provided on the adjusting block (409). Both ends of the screw rod (407) are rotatably arranged on the extension frame (405), and the screw rod (409) is provided on the outer side end of the lifting plate (402). 07) is provided with a rotating head (408) at the outer end, an adjusting block (409) is provided with a rotating inner shaft (410), a deflection plate (411) is connected to the rotating inner shaft (410), a concave deflection plate (412) is provided at the other end of the deflection plate (411), an adjusting protrusion (413) is inserted into the concave deflection plate (412), an outer plate (416) is provided at the outer end of the lower rotating column (415), an inclined plate (417) is provided on the outer wall of the outer plate (416), a length direction of the inclined plate (417) is parallel to a length direction of the concave deflection plate (412), and the inclined plate (417) is parallel to the length direction of the concave deflection plate (412). 7) is sleeved with a rotating truncated table (418), the inner end of the rotating truncated table (418) is provided with a through groove, the lower end of the inclined plate (417) is inserted into the through groove, the outer end of the rotating truncated table (418) is sleeved with a pair of arc circles (419), and the arc circles (419) are each provided with an extended support plate (420), the extended support plate (420), the extended support plate (420) is sleeved with a guide sleeve (421), the guide sleeve (421) is installed on the bottom plate (100) through the installation side plate (422), and the other end of the extended support plate (420) is installed with a round head convex plate (423); The conveying mechanism (6) comprises a guide rail (600) mounted on the upper side of the bottom plate (100), the inner side wall of the guide rail (600) is formed with a guide groove (601) in an open manner, a conveying guide is arranged in the guide groove (601), the inner side end of the conveying guide is provided with a folding bottom plate (602), the outer side end of the folding bottom plate (602) is provided with an upper extension side plate (603) extending upward, the upper end of the upper extension side plate (603) is provided with an inwardly extending convex plate (604), the inner side end of the inwardly extending convex plate (604) is penetrated with a telescopic pin (605), and the upper end of the telescopic pin (605) is sleeved with a spring (606), a lower convex plate (607) is provided at the lower end of the telescopic pin (605), a movable side plate (608) is provided on the lower convex plate (607), an upper pressure plate (611) is provided at the lower end of the movable side plate (608), an oblique hole (610) is provided on the movable side plate (608), a horizontal hole (609) in a horizontal state is provided at the upper end of the upper extended side plate (603), the inner end of the oblique hole (610) is inclined downward, a movable rod is passed through the oblique hole (610), the outer end of the movable rod is passed through the horizontal hole (609), and the movable rod is installed on the round head convex plate (423).

2. The method for preparing a light guide plate according to claim 1, characterized in that: The optical microstructure is parallel to the light emitting surface of the light guide plate.

3. The method for preparing a light guide plate according to claim 2, characterized in that: The optical microstructure is protruding and / or recessed on the light guide plate.

4. The method for preparing a light guide plate according to claim 3, characterized in that: The cross section of the optical microstructure is a V-shaped structure and / or a rectangular structure and / or an arc-shaped structure.

5. The method for preparing a light guide plate according to claim 3, characterized in that: The optical microstructure comprises a first transverse section (1b), a first vertical section (1c) is provided at one end of the first transverse section (1b), a second transverse section (1d) is provided at the other end of the first vertical section (1c), a second vertical section (1e) is provided at the other end of the second transverse section (1d), a first angle (1a) is formed between the first transverse section (1b) and the first vertical section (1c), a second angle (1h) is formed between the first vertical section (1c) and the second transverse section (1d), and a third angle (1g) is formed between the second transverse section (1d) and the second vertical section (1e).

6. The method for preparing a light guide plate according to claim 5, characterized in that: The length of the first vertical section (1c) and the second vertical section (1e) is less than or equal to 0.1 mm.

7. The method for preparing a light guide plate according to claim 5, characterized in that: The lengths of the first transverse section (1b) and the second transverse section (1d) are greater than or equal to 10 μm.

8. The method for preparing a light guide plate according to claim 5, characterized in that: The first angle (1a), the second angle (1h) and the third angle (1g) are in the range of 88° to 92°.

Images