TW201420247A - Laser processing method and its device - Google Patents

Abstract

The present invention is mainly to provide an optical plate laser processing method with simplified manufacturing process and high-volume productivity. The laser processing method and its device are used to perform processing on mold block, where the laser processing unit receives graphic files of the machining patterns, sets the orientation parameters according to the graphic file, and then the processing parameters are inputted manually. The processing parameters include a predetermined depth and laser energy parameter, enabling the mold block to form with a plurality of network points. After that, the mold block is used to replicate an optical plate.

Description

Laser processing method and device thereof

The invention relates to a laser processing method and a device thereof, in particular to a laser processing method and a device thereof for fabricating an optical plate member with simplified process and high mass production.

Since the liquid crystal of the liquid crystal display panel itself has no illuminating property, in order to achieve the display effect, the liquid crystal display panel needs to provide a light source device, such as a backlight system, for supplying a surface light source with sufficient brightness and uniform distribution to the liquid crystal display panel.

The backlight system of the prior art is mainly composed of a light source, a light guide plate, a reflection plate, a diffusion plate and a seesaw. The light source may be disposed on one side or opposite sides of the light guide plate and emit light to the light guide plate. The light guide plate is configured to guide the light transmission direction so that the light is uniformly emitted from the light exit surface of the light guide plate, and the reflector is disposed opposite to the bottom surface of the light guide plate to reflect the light emitted from the bottom surface of the light guide plate into the light guide plate to improve the light. Utilization rate. The light-emitting surface of the diffuser plate and the fascia plate opposite to the light guide plate are sequentially arranged to make the light distribution from the light guide plate more uniform, thereby improving the brightness and uniformity of the liquid crystal display panel; therefore, the design and manufacture of the light guide plate are related to the backlight module optical Design and control of brightness and average fineness are the most important technologies and costs for backlight module manufacturers.

In general, the conventional light guide plate is manufactured as follows:

1. Screen printing method, using a material with "high reflectivity" and "no light absorption" on an acrylic plate, and printing a circular or square pattern on the bottom surface of the light guide plate.

2. Using a mold, direct injection molding to form a light guide plate with a pattern, wherein the pattern can be formed on the light exit surface or the light incident surface of the light guide plate. First, a sheet metal having a light guide plate pattern is flatly attached to one of the female molds (or mirror mold cores) of the injection molding mold, and then the mold is closed to form a male mold and the female mold. At this time, the raw material (usually propylene, commonly known as acrylic) is injected into the cavity from the injection port of the male mold in the direction of the arrow, and is matched with the copying machine such as the injection machine and the hot press to complete the light guide plate with the pattern. The production of the light guide plate can be formed on the sheet metal by using cutting tools, lathes, wire cutting, etching, sand blasting and the like.

However, in the prior art light guide plate manufacturing technology, since the mold for manufacturing the light guide plate is formed by sandblasting or tool engraving, etc., if the tool engraving processing technology is adopted, the tool cost is large, the manufacturing time is long, and the precision is poor. And the lack of diversity of the light guide plate pattern; in addition, the reproducibility of the sandblasting and etching process is not good, so the repeatability of the mold making cannot be effectively improved, and the light distribution is often generated when the mold is produced.

In addition, in the control of the dense distribution of the light guide plate pattern, if the blasting surface is to be used to adjust the distribution of the light guide plate with different roughness distribution, thereby adjusting the uniformity of the illumination of the backlight module, it is unfortunate that the current sandblasting process The technology cannot accurately control the density of processing points in different areas on the light guide plate. However, if only the same surface roughness of the same surface is applied, the uniformity of the backlight module is not easily adjusted. The bottleneck faced by today's light guide panels.

In view of this, the present invention provides a process simplification and high mass productivity. The laser processing method and apparatus for fabricating the optical plate member are the main objects thereof.

In order to achieve the above object, the laser processing method of the present invention is used for processing on a module, wherein the laser processing unit receives a graphic pattern of a processing pattern, sets an orientation parameter according to the graphic file, and manually inputs a processing parameter, The processing parameters include a predetermined depth and a laser energy parameter, such that the module forms a corresponding plurality of dots, and the module is retreaded to form an optical plate.

By using the above technical features, a module of an optical plate (which may be a light guide plate) is fabricated by using a laser processing technology, so that a light-emitting surface of the light guide plate forms a laser processing pattern, thereby greatly improving the light-emitting efficiency of the light guide plate, and effectively Shorten the processing time, reduce the production cost, make diversified pattern design, have high precision, use laser processing, and do not contact with the module. Therefore, there is no such phenomenon as tool wear and can improve the light guide plate. The light arc phenomenon on the light side achieves the light mixing effect and shortens the light mixing distance. In addition, due to its high precision, the module using laser processing has good reproducibility of the module, which can improve the repeatability of module production.

In summary, the present invention can effectively increase the luminous efficiency and quality of the light guide plate and reduce the manufacturing cost of the light guide plate, thereby contributing to market competitiveness and product profit.

According to the above main technical features, the laser energy parameters include a design pulse power, a design pulse frequency, and a design processing time.

According to the above main technical features, the predetermined depth can be achieved by controlling the repetition frequency of the laser processing unit.

According to the above main technical features, the optical plate member may be a light guide plate, and each dot of the module is correspondingly written on the light incident surface of the light guide plate.

According to the above main technical features, the laser energy parameter is set to be small in the processing parameter, and the predetermined depth is deep, and the corner point is formed in the module.

According to the above main technical features, the module can be embossed by injection molding.

In order to achieve the above object, the present invention also provides a laser processing apparatus for processing on a module, comprising at least: a graphic design unit, a laser processing unit, and a manual setting unit; wherein the graphic design unit is used for Designing a processing pattern and forming a graphic file; the laser processing unit can receive the graphic file and set an orientation parameter according to the graphic file; and the manual setting unit can manually input the processing parameter and transmit the processing parameter to the lightning The laser processing unit processes the module according to the orientation parameter and the processing parameter, and finally uses the module to reticle to form an optical plate.

According to the above main technical features, the image design unit and the laser processing unit can be connected in a wired or wireless manner.

According to the above main technical features, the manual setting unit is further provided with input buttons and a screen connected to each other.

The features of the present invention can be clearly understood by referring to the drawings and the detailed description of the embodiments.

As shown in the first schematic diagram of the laser processing apparatus of the present invention, the laser processing apparatus 1 of the present invention comprises at least: an image designing unit 11, a laser processing unit 12, and a manual setting unit 13; The unit 11 is used to design a processing pattern and is formed with a graphic file; the laser processing unit 12 is connected to the image design unit 11, and the two can be connected by wire or wirelessly, and the laser is connected. The processing unit 12 can receive the graphic file and set the orientation parameter according to the graphic file; and the manual setting unit 13 is connected to the laser processing unit 12, can manually input the processing parameter, and transmit the processing parameter to the laser processing unit, The laser processing unit processes the module according to the orientation parameters and the processing parameters described above.

For the overall laser processing method, please refer to the second figure. The laser processing apparatus 1 of the present invention is used for processing on the module 2, and is transmitted to the laser processing by the graphic file designed by the graphic design unit 11. The unit 12, the laser processing unit can set the azimuth parameter according to the graphic file (which can include the orientation parameters of the X and Y axes), and manually input the machining parameters by the manual setting unit 13, the processing parameters including a predetermined depth and the laser The energy parameter; of course, the manual setting unit 13 may further be provided with an input button 131 and a screen 131 connected to each other to facilitate inputting and displaying the processing parameters.

Wherein, the azimuth parameter may include a coordinate position of the X and Y axes, and the predetermined depth may be achieved by controlling a repetition frequency of the laser processing unit, and the laser energy parameter includes a design pulse power, a design pulse frequency, and a design process. The laser processing unit emits a laser beam corresponding to the azimuth parameter, the predetermined depth and the laser energy parameter set by the above, so that the module 2 forms a corresponding plurality of dots 21, and then the module 2 remakes to form an optical plate.

The module can be placed in the mold to complete the production of the optical plate by embossing by injection molding; of course, the optical plate member can be a light guide plate, and the dots of the module are correspondingly written on the light incident surface of the light guide plate, The light incident surface of the light guide plate is formed into a laser processing pattern, thereby greatly improving the light emitting efficiency of the light guide plate.

Furthermore, the laser beam emitted by the laser processing unit can form different shapes of dots in the module, such as a circular or pyramidal shape, wherein the processing parameters The laser energy parameter is set to be small, and the predetermined depth is deep, the corner point of the module may be formed; of course, the orientation parameter may be used to control the formation of the mesh point at the predetermined position, or the repetition frequency of the laser processing unit may be controlled. To form dots of different depths, and to control the size and shape of the dots formed by the laser energy parameters to achieve a diversified design.

It is worth mentioning that the laser processing method of the invention can effectively shorten the processing time of the process, reduce the manufacturing cost, can carry out diversified pattern design and has high precision, and is not in contact with the module due to the use of laser processing. The processing is not like the tool wear phenomenon, and the light arc phenomenon on the light-incident side of the light guide plate can be improved, the light mixing effect can be achieved, and the light mixing distance can be shortened. In addition, due to its high precision, the module using laser processing has good reproducibility of the module, which can improve the repeatability of module production.

As described above, the present invention provides a preferred and feasible laser processing method and apparatus thereof, and an application for an invention patent according to law; the technical content and technical features of the present invention are disclosed above, but those skilled in the art may still The various alternatives and modifications may be made without departing from the spirit and scope of the invention. Therefore, the scope of the present invention should be construed as being limited by the scope of the appended claims

1‧‧‧ Laser processing equipment

11‧‧‧ graphic design unit

12‧‧‧Laser processing unit

13‧‧‧Manual setting unit

131‧‧‧ input button

131‧‧‧ screen

The first figure is a schematic structural view of a laser processing apparatus in the present invention.

The second figure is a perspective view of the structure of the laser processing apparatus and module in the present invention.

1‧‧‧ Laser processing equipment

11‧‧‧ graphic design unit

12‧‧‧Laser processing unit

13‧‧‧Manual setting unit

Claims (10)

A laser processing method for processing on a module, the laser processing unit receiving a graphic file of a processing pattern, setting an orientation parameter according to the graphic file, and manually inputting a processing parameter, the processing parameter including a predetermined depth and a lightning The energy parameter is such that the module forms a corresponding plurality of dots, and the module is retreaded to form an optical plate. The laser processing method of claim 1, wherein the laser energy parameter comprises a design pulse power, a design pulse frequency, and a design processing time. The laser processing method of claim 1, wherein the predetermined depth is achieved by controlling a repetition frequency of the laser processing unit. The laser processing method according to any one of the preceding claims, wherein the optical plate member can be a light guide plate, and each dot of the module is correspondingly written on the light guide plate. Into the glossy surface. The laser processing method according to any one of claims 1 to 3, wherein the processing parameter has a small laser energy parameter and a predetermined depth is deep, and the pyramid is shaped to form a pyramid. The outlets. The laser processing method according to any one of claims 1 to 3, wherein the module is rewritable by injection molding. A laser processing device for processing on a module, comprising at least: a graphic design unit for designing a processing pattern and forming a graphic file; a laser processing unit connected to the graphic design unit to receive the graphic And set the orientation parameter according to the graphic file; and manually setting the unit, connecting the laser processing unit, and manually inputting the processing The parameter is transmitted to the laser processing unit, and the laser processing unit processes the module according to the orientation parameter and the processing parameter. The laser processing method of claim 7, wherein the image design unit and the laser processing unit are connectable in a wired or wireless manner. The laser processing method of claim 7, wherein the manual setting unit is further provided with an input button and a screen connected to each other. The laser processing apparatus of any one of clauses 7 to 9, wherein the laser energy parameter comprises a design pulse power, a design pulse frequency, and a design processing time, and the predetermined depth This can be achieved by controlling the repetition frequency of the laser processing unit.